C# / VB.NET / C++ CLI: Create, read and write MS Access (mdb, accdb), MySQL, SQL Server, SQL Server Compact and SQLite databases

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13 Nov 2014CPOL3 min read

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Both MS Access formats (mdb and new - accdb), MSSQL 2008 R2, MSSQL CE, SQLite, MySQL

Introduction

These 6 very simple examples demonstrate how to:

connect mdb, accdb, MySQL, SQL Server R2 2008, SQL Server Compact, SQLite databases in C#, VB.NET and C++/CLI languages
prevent errors if database or table isn't exists and recreate it
read data from db to DataTable and show it in DataGridView
save modified data to db by using Command Builder
prevent id field editing
prevent intrusive MessageBox when user trying to input letters into INT column cell

A bit later I will add WPF versions for C# and VB.NET sources and (may be) any etc.

Access (mdb)

Important:

(C# and VB.NET only) set the project configuration to x86: provider used to connect databases is 32-bit application
you can create table with space in it's/column's name by using [] characters (e.g [column name]), but you can't save changes in this table by using OleDbCommandBuilder
Redistribution: mdb databases aren't requires any third-party libraries or MS Access to run. Provider is pre-installed on Win2000 and higher.

Code in C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.IO; // File.Exists()
using System.Data.OleDb; // OleDbConnection, OleDbDataAdapter, OleDbCommandBuilder

namespace MS_Access__mdb__in_CSharp
{
    public partial class Form1 : Form
    {
        string DBPath;

        OleDbConnection conn;
        OleDbDataAdapter adapter;
        DataTable dtMain;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DBPath = Application.StartupPath + "\\test.mdb";

            // create DB via ADOX if not exists
            if (!File.Exists(DBPath))
            {
                ADOX.Catalog cat = new ADOX.Catalog();
                cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + DBPath);
                cat = null;
            }

            // connect to DB
            conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + DBPath);
            conn.Open();

            // create table "Table_1" if not exists
            // DO NOT USE SPACES IN TABLE AND COLUMNS NAMES TO PREVENT TROUBLES WITH SAVING, USE _
            // OLEDBCOMMANDBUILDER DON'T SUPPORT COLUMNS NAMES WITH SPACES
            try
            {
                using (OleDbCommand cmd = new OleDbCommand("CREATE TABLE [Table_1] ([id] COUNTER PRIMARY KEY, [text_column] MEMO, [int_column] INT);", conn))
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch (Exception ex) {if (ex != null) ex = null; }

            // get all tables from DB
            using (DataTable dt = conn.GetSchema("Tables"))
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_TYPE")].ToString() == "TABLE")
                    {
                        comboBoxTables.Items.Add(dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")].ToString());
                    }
                }
            }
        }

        private void buttonOK_Click(object sender, EventArgs e)
        {
            if (comboBoxTables.SelectedItem == null) return;

            adapter = new OleDbDataAdapter("SELECT * FROM [" + comboBoxTables.SelectedItem.ToString() + "]", conn);
            
            new OleDbCommandBuilder(adapter);

            dtMain = new DataTable();
            adapter.Fill(dtMain);
            dtMain.Columns["id"].ReadOnly = true; // deprecate id field edit to prevent exceptions
            dataGridView1.DataSource = dtMain;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (adapter == null) return;

            adapter.Update(dtMain);
        }

        // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (dtMain.Columns[e.ColumnIndex].DataType == typeof(Int64) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int32) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int16))
            {
                Rectangle rectColumn;
                rectColumn = dataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, false);

                Rectangle rectRow;
                rectRow = dataGridView1.GetRowDisplayRectangle(e.RowIndex, false);

                toolTip1.ToolTipTitle = "This field is for numbers only.";
                toolTip1.Show(" ",
                          dataGridView1,
                          rectColumn.Left, rectRow.Top + rectRow.Height);
            }
        }

        private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
        {
            toolTip1.Hide(dataGridView1);
        }
    }
}

Code in VB.NET:

VB.NET

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Imports System.IO
' File.Exists()
Imports System.Data.OleDb
' OleDbConnection, OleDbDataAdapter, OleDbCommandBuilder

Public Class Form1
    Private DBPath As String

    Private conn As OleDbConnection
    Private adapter As OleDbDataAdapter
    Private dtMain As DataTable

    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
        DBPath = Application.StartupPath + "\test.mdb"

        ' create DB via ADOX if not exists
        ' NOTE: to use ADOX add reference to COM Microsoft ADO Ext. 2.6 for DDL and Security!
        If Not File.Exists(DBPath) Then
            Dim cat As New ADOX.Catalog()
            cat.Create(Convert.ToString("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=") & DBPath)
            cat = Nothing
        End If

        ' connect to DB
        conn = New OleDbConnection(Convert.ToString("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=") & DBPath)
        conn.Open()

        ' create table "Table_1" if not exists
        ' DO NOT USE SPACES IN TABLE AND COLUMNS NAMES TO PREVENT TROUBLES WITH SAVING, USE _
        ' OLEDBCOMMANDBUILDER DON'T SUPPORT COLUMNS NAMES WITH SPACES
        Try
            Using cmd As New OleDbCommand("CREATE TABLE [Table_1] ([id] COUNTER PRIMARY KEY, [text_column] MEMO, [int_column] INT);", conn)
                cmd.ExecuteNonQuery()
            End Using
        Catch ex As Exception
            If ex IsNot Nothing Then
                ex = Nothing
            End If
        End Try

        ' get all tables from DB
        Using dt As DataTable = conn.GetSchema("Tables")
            For i As Integer = 0 To dt.Rows.Count - 1
                If dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_TYPE")).ToString() = "TABLE" Then
                    comboBoxTables.Items.Add(dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_NAME")).ToString())
                End If
            Next
        End Using
    End Sub

    Private Sub buttonOK_Click(ByVal sender As Object, ByVal e As EventArgs)
        If comboBoxTables.SelectedItem Is Nothing Then
            Return
        End If

        adapter = New OleDbDataAdapter("SELECT * FROM [" + comboBoxTables.SelectedItem.ToString() + "]", conn)

        Dim builder = New OleDbCommandBuilder(adapter)

        dtMain = New DataTable()
        adapter.Fill(dtMain)
        dtMain.Columns("id").[ReadOnly] = True
        ' deprecate id field edit to prevent exceptions
        dataGridView1.DataSource = dtMain
    End Sub

    Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As FormClosedEventArgs)
        If adapter Is Nothing Then
            Return
        End If

        adapter.Update(dtMain)
    End Sub

    ' show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
    Private Sub dataGridView1_DataError(ByVal sender As Object, ByVal e As DataGridViewDataErrorEventArgs)
        If dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int64) Or _
           dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int32) Or _
           dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int16) Then
            Dim rectColumn As Rectangle
            rectColumn = DataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, False)

            Dim rectRow As Rectangle
            rectRow = DataGridView1.GetRowDisplayRectangle(e.RowIndex, False)

            ToolTip1.ToolTipTitle = "This field is for numbers only."
            ToolTip1.Show(" ", DataGridView1, rectColumn.Left, rectRow.Top + rectRow.Height)
        End If
    End Sub

    Private Sub dataGridView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
        toolTip1.Hide(dataGridView1)
    End Sub

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

End Class

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Code in C++/CLI:

MC++

#pragma once

namespace MSAccessmdbinCCLI {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    using namespace System::IO; // File::Exists()
    using namespace System::Data::OleDb; // OleDbConnection, OleDbDataAdapter, OleDbCommandBuilder

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
            private: System::Windows::Forms::DataGridView^ dataGridView1;
        private: System::Windows::Forms::Label^ label1;
        private: System::Windows::Forms::ComboBox^ comboBoxTables;
        private: System::Windows::Forms::Button^ buttonOK;
        private: System::Windows::Forms::ToolTip^ toolTip1;
    private: System::ComponentModel::IContainer^  components;
    protected: 

    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        void InitializeComponent(void)
        {
            this->components = (gcnew System::ComponentModel::Container());
            this->dataGridView1 = (gcnew System::Windows::Forms::DataGridView());
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->comboBoxTables = (gcnew System::Windows::Forms::ComboBox());
            this->buttonOK = (gcnew System::Windows::Forms::Button());
            this->toolTip1 = (gcnew System::Windows::Forms::ToolTip(this->components));
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->BeginInit();
            this->SuspendLayout();
            // 
            // dataGridView1
            // 
            this->dataGridView1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) 
                | System::Windows::Forms::AnchorStyles::Left) 
                | System::Windows::Forms::AnchorStyles::Right));
            this->dataGridView1->ColumnHeadersHeightSizeMode = System::Windows::Forms::DataGridViewColumnHeadersHeightSizeMode::AutoSize;
            this->dataGridView1->Location = System::Drawing::Point(12, 44);
            this->dataGridView1->Name = L"dataGridView1";
            this->dataGridView1->ShowCellToolTips = false;
            this->dataGridView1->Size = System::Drawing::Size(493, 266);
            this->dataGridView1->TabIndex = 0;
            this->dataGridView1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::dataGridView1_MouseDown);
            this->dataGridView1->DataError += gcnew System::Windows::Forms::DataGridViewDataErrorEventHandler(this, &Form1::dataGridView1_DataError);
            // 
            // label1
            // 
            this->label1->Location = System::Drawing::Point(12, 9);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(65, 32);
            this->label1->TabIndex = 1;
            this->label1->Text = L"Select table to show:";
            // 
            // comboBoxTables
            // 
            this->comboBoxTables->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
            this->comboBoxTables->FormattingEnabled = true;
            this->comboBoxTables->Location = System::Drawing::Point(83, 12);
            this->comboBoxTables->Name = L"comboBoxTables";
            this->comboBoxTables->Size = System::Drawing::Size(165, 21);
            this->comboBoxTables->TabIndex = 2;
            // 
            // buttonOK
            // 
            this->buttonOK->Location = System::Drawing::Point(254, 12);
            this->buttonOK->Name = L"buttonOK";
            this->buttonOK->Size = System::Drawing::Size(56, 21);
            this->buttonOK->TabIndex = 3;
            this->buttonOK->Text = L"OK";
            this->buttonOK->UseVisualStyleBackColor = true;
            this->buttonOK->Click += gcnew System::EventHandler(this, &Form1::buttonOK_Click);
            // 
            // toolTip1
            // 
            this->toolTip1->AutoPopDelay = 5000;
            this->toolTip1->InitialDelay = 0;
            this->toolTip1->IsBalloon = true;
            this->toolTip1->ReshowDelay = 0;
            this->toolTip1->ToolTipIcon = System::Windows::Forms::ToolTipIcon::Warning;
            this->toolTip1->UseAnimation = false;
            this->toolTip1->UseFading = false;
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(517, 322);
            this->Controls->Add(this->buttonOK);
            this->Controls->Add(this->comboBoxTables);
            this->Controls->Add(this->label1);
            this->Controls->Add(this->dataGridView1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->FormClosed += gcnew System::Windows::Forms::FormClosedEventHandler(this, &Form1::Form1_FormClosed);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->EndInit();
            this->ResumeLayout(false);

        }
#pragma endregion
        String ^DBPath;

        OleDbConnection ^conn;
        OleDbDataAdapter ^adapter;
        DataTable ^dtMain;

    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 DBPath = Application::StartupPath + "\\test.mdb";

                 // create DB via ADOX if not exists
                 if (!File::Exists(DBPath)) {
                     ADOX::Catalog ^cat = gcnew ADOX::Catalog();
                     cat->Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + DBPath);
                     cat = nullptr;
                 }

                 // connect to DB
                 conn = gcnew OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + DBPath);
                 conn->Open();

                 // create table "Table_1" if not exists
                 // DO NOT USE SPACES IN TABLE AND COLUMNS NAMES TO PREVENT TROUBLES WITH SAVING, USE _
                 // OLEDBCOMMANDBUILDER DON'T SUPPORT COLUMNS NAMES WITH SPACES
                 try {
                    OleDbCommand ^cmd = gcnew OleDbCommand("CREATE TABLE [Table_1] ([id] COUNTER PRIMARY KEY, [text_column] MEMO, [int_column] INT);", conn);
                    cmd->ExecuteNonQuery();
                    delete cmd;
                 } catch (Exception ^ex) {if (ex != nullptr) ex = nullptr; }

                 // get all tables from DB
                 DataTable ^dt = conn->GetSchema("Tables");
                 for (int i = 0; i < dt->Rows->Count; i++) {
                    if (dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_TYPE")]->ToString() == "TABLE") {
                        comboBoxTables->Items->Add(dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_NAME")]->ToString());
                    }
                 }
                 delete dt;
             }
private: System::Void buttonOK_Click(System::Object^  sender, System::EventArgs^  e) {
             if (comboBoxTables->SelectedItem == nullptr) return;

             adapter = gcnew OleDbDataAdapter("SELECT * FROM [" + comboBoxTables->SelectedItem->ToString() + "]", conn);

             gcnew OleDbCommandBuilder(adapter);

             dtMain = gcnew DataTable();
             adapter->Fill(dtMain);
             dtMain->Columns["id"]->ReadOnly = true; // deprecate id field edit to prevent exceptions
             dataGridView1->DataSource = dtMain;
         }
private: System::Void Form1_FormClosed(System::Object^  sender, System::Windows::Forms::FormClosedEventArgs^  e) {
             if (adapter == nullptr) return;

             adapter->Update(dtMain);
         }
         // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
private: System::Void dataGridView1_DataError(System::Object^  sender, System::Windows::Forms::DataGridViewDataErrorEventArgs^  e) {
             if (dtMain->Columns[e->ColumnIndex]->DataType == Int64::typeid ||
                 dtMain->Columns[e->ColumnIndex]->DataType == Int32::typeid ||
                dtMain->Columns[e->ColumnIndex]->DataType == Int16::typeid) {
                Rectangle ^rectColumn;
                rectColumn = dataGridView1->GetColumnDisplayRectangle(e->ColumnIndex, false);

                Rectangle ^rectRow;
                rectRow = dataGridView1->GetRowDisplayRectangle(e->RowIndex, false);

                toolTip1->ToolTipTitle = "This field is for numbers only.";
                toolTip1->Show(" ",
                          dataGridView1,
                          rectColumn->Left, rectRow->Top + rectRow->Height);

                delete rectColumn;
                delete rectRow;
            }
         }
private: System::Void dataGridView1_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
             toolTip1->Hide(dataGridView1);
         }
};
}

Access (accdb)

Important:

(C# and VB.NET only) set the project configuration to x86: 32-bit provider only may be installed
you can create table with space in it's/column's name by using [] characters (e.g [column name]), but you can't save changes in this table by using OleDbCommandBuilder
Redistribution: accdb databases aren't requires MS Access to run, but are requires Microsoft Access Database Engine. Download it's 2010 (x86 and x64) version here: http://www.microsoft.com/en-us/download/details.aspx?id=13255

Code in C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.IO; // File.Exists()
using System.Data.OleDb; // OleDbConnection, OleDbDataAdapter, OleDbCommandBuilder

namespace MS_Access__accdb__in_CSharp
{
    public partial class Form1 : Form
    {
        string DBPath;

        OleDbConnection conn;
        OleDbDataAdapter adapter;
        DataTable dtMain;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DBPath = Application.StartupPath + "\\test.accdb";

            // create DB via ADOX if not exists
            if (!File.Exists(DBPath))
            {
                ADOX.Catalog cat = new ADOX.Catalog();
                try
                {
                    cat.Create("Provider=Microsoft.ACE.OLEDB.10.0;Data Source=" + DBPath);
                }
                catch
                {
                    try
                    {
                        cat.Create("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DBPath);
                    }
                    catch
                    {
                        try
                        {
                            cat.Create("Provider=Microsoft.ACE.OLEDB.14.0;Data Source=" + DBPath);
                        }
                        catch
                        {
                            cat.Create("Provider=Microsoft.ACE.OLEDB.15.0;Data Source=" + DBPath);
                        }
                    }
                }
                cat = null;
            }

            // connect to DB
            try
            {
                conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.10.0;Data Source=" + DBPath);
                conn.Open();
            }
            catch
            {
                try
                {
                    conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DBPath);
                    conn.Open();
                }
                catch
                {
                    try
                    {
                        conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.14.0;Data Source=" + DBPath);
                        conn.Open();
                    }
                    catch
                    {
                        conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.15.0;Data Source=" + DBPath);
                        conn.Open();
                    }
                }
            }

            // create table "Table_1" if not exists
            // DO NOT USE SPACES IN TABLE AND COLUMNS NAMES TO PREVENT TROUBLES WITH SAVING, USE _
            // OLEDBCOMMANDBUILDER DON'T SUPPORT COLUMNS NAMES WITH SPACES
            try
            {
                using (OleDbCommand cmd = new OleDbCommand("CREATE TABLE [Table_1] ([id] COUNTER PRIMARY KEY, [text_column] MEMO, [int_column] INT);", conn))
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch (Exception ex) {if (ex != null) ex = null; }

            // get all tables from DB
            using (DataTable dt = conn.GetSchema("Tables"))
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_TYPE")].ToString() == "TABLE")
                    {
                        comboBoxTables.Items.Add(dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")].ToString());
                    }
                }
            }
        }

        private void buttonOK_Click(object sender, EventArgs e)
        {
            if (comboBoxTables.SelectedItem == null) return;

            adapter = new OleDbDataAdapter("SELECT * FROM [" + comboBoxTables.SelectedItem.ToString() + "]", conn);
            
            new OleDbCommandBuilder(adapter);

            dtMain = new DataTable();
            adapter.Fill(dtMain);
            dtMain.Columns["id"].ReadOnly = true; // deprecate id field edit to prevent exceptions
            dataGridView1.DataSource = dtMain;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (adapter == null) return;

            adapter.Update(dtMain);
        }

        // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (dtMain.Columns[e.ColumnIndex].DataType == typeof(Int64) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int32) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int16))
            {
                Rectangle rectColumn;
                rectColumn = dataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, false);

                Rectangle rectRow;
                rectRow = dataGridView1.GetRowDisplayRectangle(e.RowIndex, false);

                toolTip1.ToolTipTitle = "This field is for numbers only.";
                toolTip1.Show(" ",
                          dataGridView1,
                          rectColumn.Left, rectRow.Top + rectRow.Height);
            }
        }

        private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
        {
            toolTip1.Hide(dataGridView1);
        }
    }
}

Code in VB.NET:

VB.NET

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Imports System.IO
' File.Exists()
Imports System.Data.OleDb
' OleDbConnection, OleDbDataAdapter, OleDbCommandBuilder

Public Class Form1
    Private DBPath As String

    Private conn As OleDbConnection
    Private adapter As OleDbDataAdapter
    Private dtMain As DataTable

    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
        DBPath = Application.StartupPath + "\test.accdb"

        ' create DB via ADOX if not exists
        ' NOTE: to use ADOX add reference to COM Microsoft ADO Ext. 6.0 for DDL and Security!
        If Not File.Exists(DBPath) Then
            Dim cat As New ADOX.Catalog()
            Try
                cat.Create("Provider=Microsoft.ACE.OLEDB.10.0;Data Source=" + DBPath)
            Catch
                Try
                    cat.Create("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DBPath)
                Catch
                    Try
                        cat.Create("Provider=Microsoft.ACE.OLEDB.14.0;Data Source=" + DBPath)
                    Catch
                        cat.Create("Provider=Microsoft.ACE.OLEDB.15.0;Data Source=" + DBPath)
                    End Try
                End Try
            End Try

            '=======================================================
            'Service provided by Telerik (www.telerik.com)
            'Conversion powered by NRefactory.
            'Twitter: @telerik
            'Facebook: facebook.com/telerik
            '=======================================================

            cat = Nothing
        End If

        ' connect to DB
        Try
            conn = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.10.0;Data Source=" + DBPath)
            conn.Open()
        Catch
            Try
                conn = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DBPath)
                conn.Open()
            Catch
                Try
                    conn = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.14.0;Data Source=" + DBPath)
                    conn.Open()
                Catch
                    conn = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.15.0;Data Source=" + DBPath)
                    conn.Open()
                End Try
            End Try
        End Try

        '=======================================================
        'Service provided by Telerik (www.telerik.com)
        'Conversion powered by NRefactory.
        'Twitter: @telerik
        'Facebook: facebook.com/telerik
        '=======================================================

        ' create table "Table_1" if not exists
        ' DO NOT USE SPACES IN TABLE AND COLUMNS NAMES TO PREVENT TROUBLES WITH SAVING, USE _
        ' OLEDBCOMMANDBUILDER DON'T SUPPORT COLUMNS NAMES WITH SPACES
        Try
            Using cmd As New OleDbCommand("CREATE TABLE [Table_1] ([id] COUNTER PRIMARY KEY, [text_column] MEMO, [int_column] INT);", conn)
                cmd.ExecuteNonQuery()
            End Using
        Catch ex As Exception
            If ex IsNot Nothing Then
                ex = Nothing
            End If
        End Try

        ' get all tables from DB
        Using dt As DataTable = conn.GetSchema("Tables")
            For i As Integer = 0 To dt.Rows.Count - 1
                If dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_TYPE")).ToString() = "TABLE" Then
                    comboBoxTables.Items.Add(dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_NAME")).ToString())
                End If
            Next
        End Using
    End Sub

    Private Sub buttonOK_Click(ByVal sender As Object, ByVal e As EventArgs)
        If comboBoxTables.SelectedItem Is Nothing Then
            Return
        End If

        adapter = New OleDbDataAdapter("SELECT * FROM [" + comboBoxTables.SelectedItem.ToString() + "]", conn)

        Dim builder = New OleDbCommandBuilder(adapter)

        dtMain = New DataTable()
        adapter.Fill(dtMain)
        dtMain.Columns("id").[ReadOnly] = True
        ' deprecate id field edit to prevent exceptions
        dataGridView1.DataSource = dtMain
    End Sub

    Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As FormClosedEventArgs)
        If adapter Is Nothing Then
            Return
        End If

        adapter.Update(dtMain)
    End Sub

    ' show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
    Private Sub dataGridView1_DataError(ByVal sender As Object, ByVal e As DataGridViewDataErrorEventArgs)
        If dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int64) Or _
           dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int32) Or _
           dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int16) Then
            Dim rectColumn As Rectangle
            rectColumn = DataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, False)

            Dim rectRow As Rectangle
            rectRow = DataGridView1.GetRowDisplayRectangle(e.RowIndex, False)

            ToolTip1.ToolTipTitle = "This field is for numbers only."
            ToolTip1.Show(" ", DataGridView1, rectColumn.Left, rectRow.Top + rectRow.Height)
        End If
    End Sub

    Private Sub dataGridView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
        toolTip1.Hide(dataGridView1)
    End Sub

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

End Class

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Code in C++/CLI:

MC++

#pragma once

namespace MSAccessaccdbinCCLI {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    using namespace System::IO; // File::Exists()
    using namespace System::Data::OleDb; // OleDbConnection, OleDbDataAdapter, OleDbCommandBuilder

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
            private: System::Windows::Forms::DataGridView^ dataGridView1;
        private: System::Windows::Forms::Label^ label1;
        private: System::Windows::Forms::ComboBox^ comboBoxTables;
        private: System::Windows::Forms::Button^ buttonOK;
        private: System::Windows::Forms::ToolTip^ toolTip1;
    private: System::ComponentModel::IContainer^  components;
    protected: 

    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        void InitializeComponent(void)
        {
            this->components = (gcnew System::ComponentModel::Container());
            this->dataGridView1 = (gcnew System::Windows::Forms::DataGridView());
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->comboBoxTables = (gcnew System::Windows::Forms::ComboBox());
            this->buttonOK = (gcnew System::Windows::Forms::Button());
            this->toolTip1 = (gcnew System::Windows::Forms::ToolTip(this->components));
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->BeginInit();
            this->SuspendLayout();
            // 
            // dataGridView1
            // 
            this->dataGridView1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) 
                | System::Windows::Forms::AnchorStyles::Left) 
                | System::Windows::Forms::AnchorStyles::Right));
            this->dataGridView1->ColumnHeadersHeightSizeMode = System::Windows::Forms::DataGridViewColumnHeadersHeightSizeMode::AutoSize;
            this->dataGridView1->Location = System::Drawing::Point(12, 44);
            this->dataGridView1->Name = L"dataGridView1";
            this->dataGridView1->ShowCellToolTips = false;
            this->dataGridView1->Size = System::Drawing::Size(493, 266);
            this->dataGridView1->TabIndex = 0;
            this->dataGridView1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::dataGridView1_MouseDown);
            this->dataGridView1->DataError += gcnew System::Windows::Forms::DataGridViewDataErrorEventHandler(this, &Form1::dataGridView1_DataError);
            // 
            // label1
            // 
            this->label1->Location = System::Drawing::Point(12, 9);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(65, 32);
            this->label1->TabIndex = 1;
            this->label1->Text = L"Select table to show:";
            // 
            // comboBoxTables
            // 
            this->comboBoxTables->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
            this->comboBoxTables->FormattingEnabled = true;
            this->comboBoxTables->Location = System::Drawing::Point(83, 12);
            this->comboBoxTables->Name = L"comboBoxTables";
            this->comboBoxTables->Size = System::Drawing::Size(165, 21);
            this->comboBoxTables->TabIndex = 2;
            // 
            // buttonOK
            // 
            this->buttonOK->Location = System::Drawing::Point(254, 12);
            this->buttonOK->Name = L"buttonOK";
            this->buttonOK->Size = System::Drawing::Size(56, 21);
            this->buttonOK->TabIndex = 3;
            this->buttonOK->Text = L"OK";
            this->buttonOK->UseVisualStyleBackColor = true;
            this->buttonOK->Click += gcnew System::EventHandler(this, &Form1::buttonOK_Click);
            // 
            // toolTip1
            // 
            this->toolTip1->AutoPopDelay = 5000;
            this->toolTip1->InitialDelay = 0;
            this->toolTip1->IsBalloon = true;
            this->toolTip1->ReshowDelay = 0;
            this->toolTip1->ToolTipIcon = System::Windows::Forms::ToolTipIcon::Warning;
            this->toolTip1->UseAnimation = false;
            this->toolTip1->UseFading = false;
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(517, 322);
            this->Controls->Add(this->buttonOK);
            this->Controls->Add(this->comboBoxTables);
            this->Controls->Add(this->label1);
            this->Controls->Add(this->dataGridView1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->FormClosed += gcnew System::Windows::Forms::FormClosedEventHandler(this, &Form1::Form1_FormClosed);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->EndInit();
            this->ResumeLayout(false);

        }
#pragma endregion
        String ^DBPath;

        OleDbConnection ^conn;
        OleDbDataAdapter ^adapter;
        DataTable ^dtMain;

    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 DBPath = Application::StartupPath + "\\test.accdb";

                 // create DB via ADOX if not exists
                 if (!File::Exists(DBPath)) {
                    ADOX::Catalog ^cat = gcnew ADOX::Catalog();
                    try {
                        cat->Create("Provider=Microsoft.ACE.OLEDB.10.0;Data Source=" + DBPath);
                    }
                    catch (Exception ^ex) {
                        try {
                            cat->Create("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DBPath);
                        }
                        catch (Exception ^ex) {
                            try {
                                cat->Create("Provider=Microsoft.ACE.OLEDB.14.0;Data Source=" + DBPath);
                            }
                            catch (Exception ^ex) {
                                cat->Create("Provider=Microsoft.ACE.OLEDB.15.0;Data Source=" + DBPath);
                            }
                        }
                    }
                    cat = nullptr;
                 }

                 // connect to DB
                 try {
                    conn = gcnew OleDbConnection("Provider=Microsoft.ACE.OLEDB.10.0;Data Source=" + DBPath);
                    conn->Open();
                 }
                 catch (Exception ^ex)
                 {
                    try {
                        conn = gcnew OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + DBPath);
                        conn->Open();
                    }
                    catch (Exception ^ex) {
                        try {
                            conn = gcnew OleDbConnection("Provider=Microsoft.ACE.OLEDB.14.0;Data Source=" + DBPath);
                            conn->Open();
                        }
                        catch (Exception ^ex) {
                            conn = gcnew OleDbConnection("Provider=Microsoft.ACE.OLEDB.15.0;Data Source=" + DBPath);
                            conn->Open();
                        }
                    }
                 }

                 // create table "Table_1" if not exists
                 // DO NOT USE SPACES IN TABLE AND COLUMNS NAMES TO PREVENT TROUBLES WITH SAVING, USE _
                 // OLEDBCOMMANDBUILDER DON'T SUPPORT COLUMNS NAMES WITH SPACES
                 try {
                    OleDbCommand ^cmd = gcnew OleDbCommand("CREATE TABLE [Table_1] ([id] COUNTER PRIMARY KEY, [text_column] MEMO, [int_column] INT);", conn);
                    cmd->ExecuteNonQuery();
                    delete cmd;
                 } catch (Exception ^ex) {if (ex != nullptr) ex = nullptr; }

                 // get all tables from DB
                 DataTable ^dt = conn->GetSchema("Tables");
                 for (int i = 0; i < dt->Rows->Count; i++) {
                    if (dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_TYPE")]->ToString() == "TABLE") {
                        comboBoxTables->Items->Add(dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_NAME")]->ToString());
                    }
                 }
                 delete dt;
             }
private: System::Void buttonOK_Click(System::Object^  sender, System::EventArgs^  e) {
             if (comboBoxTables->SelectedItem == nullptr) return;

             adapter = gcnew OleDbDataAdapter("SELECT * FROM [" + comboBoxTables->SelectedItem->ToString() + "]", conn);

             gcnew OleDbCommandBuilder(adapter);

             dtMain = gcnew DataTable();
             adapter->Fill(dtMain);
             dtMain->Columns["id"]->ReadOnly = true; // deprecate id field edit to prevent exceptions
             dataGridView1->DataSource = dtMain;
         }
private: System::Void Form1_FormClosed(System::Object^  sender, System::Windows::Forms::FormClosedEventArgs^  e) {
             if (adapter == nullptr) return;

             adapter->Update(dtMain);
         }
         // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
private: System::Void dataGridView1_DataError(System::Object^  sender, System::Windows::Forms::DataGridViewDataErrorEventArgs^  e) {
             if (dtMain->Columns[e->ColumnIndex]->DataType == Int64::typeid ||
                 dtMain->Columns[e->ColumnIndex]->DataType == Int32::typeid ||
                dtMain->Columns[e->ColumnIndex]->DataType == Int16::typeid) {
                Rectangle ^rectColumn;
                rectColumn = dataGridView1->GetColumnDisplayRectangle(e->ColumnIndex, false);

                Rectangle ^rectRow;
                rectRow = dataGridView1->GetRowDisplayRectangle(e->RowIndex, false);

                toolTip1->ToolTipTitle = "This field is for numbers only.";
                toolTip1->Show(" ",
                          dataGridView1,
                          rectColumn->Left, rectRow->Top + rectRow->Height);

                delete rectColumn;
                delete rectRow;
            }
         }
private: System::Void dataGridView1_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
             toolTip1->Hide(dataGridView1);
         }
};
}

MySQL

Important:

Redistribution: MySql.Data.dll library may be copied into folder with exe. You must add a reference to it for use it in your project.

Code in C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using MySql.Data.MySqlClient;

namespace MySQL_in_CSharp
{
    public partial class Form1 : Form
    {
        string DBName;

        MySqlConnection conn;
        MySqlDataAdapter adapter;
        DataTable dtMain;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DBName = "test";

            // connect to server
            // IF NOT WORKS: type your server name, user name (Uid) and password (Pwd)
            // and run a server
            conn = new MySqlConnection("Server=localhost;Uid=root;Pwd=;");
            conn.Open();

            // create a db if not exists
            try
            {
                using (MySqlCommand cmd = new MySqlCommand("CREATE DATABASE " + DBName, conn))
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch { }

            // select our database
            using (MySqlCommand cmd = new MySqlCommand("USE " + DBName, conn))
            {
                cmd.ExecuteNonQuery();
            }

            // create table "Table 1" if not exists
            // WARNING: you can to use tables and columns names with spaces,
            // but, you must use SPECIAL quote
            // it's "`", not "'"!!!
            using (MySqlCommand cmd = new MySqlCommand("CREATE TABLE IF NOT EXISTS `Table 1` (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, `text col` TEXT, `int col` INT);", conn))
            {
                cmd.ExecuteNonQuery();
            }

            // get all tables from DB
            using (DataTable dt = conn.GetSchema("Tables"))
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_TYPE")].ToString() == "BASE TABLE" &&
                        dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_SCHEMA")].ToString() == DBName)
                    {
                        comboBoxTables.Items.Add(dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")].ToString());
                    }
                }
            }
        }

        private void buttonOK_Click(object sender, EventArgs e)
        {
            adapter = new MySqlDataAdapter("SELECT * FROM `" + comboBoxTables.SelectedItem.ToString() + "`", conn);
            new MySqlCommandBuilder(adapter);
            dtMain = new DataTable();
            adapter.Fill(dtMain);
            dtMain.Columns["id"].ReadOnly = true; // deprecate id field edit to prevent exceptions
            dataGridView1.DataSource = dtMain;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (adapter == null) return;

            adapter.Update(dtMain);
        }

        // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (dtMain.Columns[e.ColumnIndex].DataType == typeof(Int64) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int32) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int16))
            {
                Rectangle rectColumn;
                rectColumn = dataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, false);

                Rectangle rectRow;
                rectRow = dataGridView1.GetRowDisplayRectangle(e.RowIndex, false);

                toolTip1.ToolTipTitle = "This field is for numbers only.";
                toolTip1.Show(" ",
                          dataGridView1,
                          rectColumn.Left, rectRow.Top + rectRow.Height);
            }
        }

        private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
        {
            toolTip1.Hide(dataGridView1);
        }
    }
}

Code in VB.NET:

VB.NET

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Imports MySql.Data.MySqlClient
' MySqlConnection, MySqlDataAdapter, MySqlCommandBuilder

Public Class Form1
    Private DBName As String

    Private conn As MySqlConnection
    Private adapter As MySqlDataAdapter
    Private dtMain As DataTable

    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
        DBName = "test"

        ' connect to server
        ' IF NOT WORKS: type your server name, user name (Uid) and password (Pwd)
        ' and run a server
        conn = New MySqlConnection("Server=localhost;Uid=root;Pwd=;")
        conn.Open()

        ' create a db if not exists
        Try
            Using cmd As New MySqlCommand(Convert.ToString("CREATE DATABASE ") & DBName, conn)
                cmd.ExecuteNonQuery()
            End Using
        Catch
        End Try

        ' select our database
        Using cmd As New MySqlCommand(Convert.ToString("USE ") & DBName, conn)
            cmd.ExecuteNonQuery()
        End Using

        ' create table "Table 1" if not exists
        ' WARNING: you can to use tables and columns names with spaces,
        ' but, you must use SPECIAL quote
        ' it's "`", not "'"!!!
        Using cmd As New MySqlCommand("CREATE TABLE IF NOT EXISTS `Table 1` (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, `text col` TEXT, `int col` INT);", conn)
            cmd.ExecuteNonQuery()
        End Using

        ' get all tables from DB
        Using dt As DataTable = conn.GetSchema("Tables")
            For i As Integer = 0 To dt.Rows.Count - 1
                If dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_TYPE")).ToString() = "BASE TABLE" AndAlso dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_SCHEMA")).ToString() = DBName Then
                    comboBoxTables.Items.Add(dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_NAME")).ToString())
                End If
            Next
        End Using
    End Sub

    Private Sub buttonOK_Click(ByVal sender As Object, ByVal e As EventArgs)
        adapter = New MySqlDataAdapter("SELECT * FROM `" + comboBoxTables.SelectedItem.ToString() + "`", conn)
        Dim builder = New MySqlCommandBuilder(adapter)
        dtMain = New DataTable()
        adapter.Fill(dtMain)
        dtMain.Columns("id").[ReadOnly] = True
        ' deprecate id field edit to prevent exceptions
        dataGridView1.DataSource = dtMain
    End Sub

    Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As FormClosedEventArgs)
        If adapter Is Nothing Then
            Return
        End If

        adapter.Update(dtMain)
    End Sub

    ' show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
    Private Sub dataGridView1_DataError(ByVal sender As Object, ByVal e As DataGridViewDataErrorEventArgs)
        If dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int64) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int32) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int16) Then
            Dim rectColumn As Rectangle
            rectColumn = DataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, False)

            Dim rectRow As Rectangle
            rectRow = DataGridView1.GetRowDisplayRectangle(e.RowIndex, False)

            ToolTip1.ToolTipTitle = "This field is for numbers only."
            ToolTip1.Show(" ", DataGridView1, rectColumn.Left, rectRow.Top + rectRow.Height)
        End If
    End Sub

    Private Sub dataGridView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
        toolTip1.Hide(dataGridView1)
    End Sub

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

End Class

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Code in C++/CLI:

MC++

#pragma once

namespace MySQLinCCLI {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    using namespace MySql::Data::MySqlClient;

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
            private: System::Windows::Forms::DataGridView^ dataGridView1;
        private: System::Windows::Forms::Label^ label1;
        private: System::Windows::Forms::ComboBox^ comboBoxTables;
        private: System::Windows::Forms::Button^ buttonOK;
        private: System::Windows::Forms::ToolTip^ toolTip1;
    private: System::ComponentModel::IContainer^  components;
    protected: 

    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        void InitializeComponent(void)
        {
            this->components = (gcnew System::ComponentModel::Container());
            this->dataGridView1 = (gcnew System::Windows::Forms::DataGridView());
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->comboBoxTables = (gcnew System::Windows::Forms::ComboBox());
            this->buttonOK = (gcnew System::Windows::Forms::Button());
            this->toolTip1 = (gcnew System::Windows::Forms::ToolTip(this->components));
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->BeginInit();
            this->SuspendLayout();
            // 
            // dataGridView1
            // 
            this->dataGridView1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) 
                | System::Windows::Forms::AnchorStyles::Left) 
                | System::Windows::Forms::AnchorStyles::Right));
            this->dataGridView1->ColumnHeadersHeightSizeMode = System::Windows::Forms::DataGridViewColumnHeadersHeightSizeMode::AutoSize;
            this->dataGridView1->Location = System::Drawing::Point(12, 44);
            this->dataGridView1->Name = L"dataGridView1";
            this->dataGridView1->ShowCellToolTips = false;
            this->dataGridView1->Size = System::Drawing::Size(493, 266);
            this->dataGridView1->TabIndex = 0;
            this->dataGridView1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::dataGridView1_MouseDown);
            this->dataGridView1->DataError += gcnew System::Windows::Forms::DataGridViewDataErrorEventHandler(this, &Form1::dataGridView1_DataError);
            // 
            // label1
            // 
            this->label1->Location = System::Drawing::Point(12, 9);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(65, 32);
            this->label1->TabIndex = 1;
            this->label1->Text = L"Select table to show:";
            // 
            // comboBoxTables
            // 
            this->comboBoxTables->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
            this->comboBoxTables->FormattingEnabled = true;
            this->comboBoxTables->Location = System::Drawing::Point(83, 12);
            this->comboBoxTables->Name = L"comboBoxTables";
            this->comboBoxTables->Size = System::Drawing::Size(165, 21);
            this->comboBoxTables->TabIndex = 2;
            // 
            // buttonOK
            // 
            this->buttonOK->Location = System::Drawing::Point(254, 12);
            this->buttonOK->Name = L"buttonOK";
            this->buttonOK->Size = System::Drawing::Size(56, 21);
            this->buttonOK->TabIndex = 3;
            this->buttonOK->Text = L"OK";
            this->buttonOK->UseVisualStyleBackColor = true;
            this->buttonOK->Click += gcnew System::EventHandler(this, &Form1::buttonOK_Click);
            // 
            // toolTip1
            // 
            this->toolTip1->AutoPopDelay = 5000;
            this->toolTip1->InitialDelay = 0;
            this->toolTip1->IsBalloon = true;
            this->toolTip1->ReshowDelay = 0;
            this->toolTip1->ToolTipIcon = System::Windows::Forms::ToolTipIcon::Warning;
            this->toolTip1->UseAnimation = false;
            this->toolTip1->UseFading = false;
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(517, 322);
            this->Controls->Add(this->buttonOK);
            this->Controls->Add(this->comboBoxTables);
            this->Controls->Add(this->label1);
            this->Controls->Add(this->dataGridView1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->FormClosed += gcnew System::Windows::Forms::FormClosedEventHandler(this, &Form1::Form1_FormClosed);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->EndInit();
            this->ResumeLayout(false);

        }
#pragma endregion
        String ^DBName;

        MySqlConnection ^conn;
        MySqlDataAdapter ^adapter;
        DataTable ^dtMain;

    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 DBName = "test";

                 // connect to server
                 // IF NOT WORKS: type your server name, user name (Uid) and password (Pwd)
                 // and run a server
                 conn = gcnew MySqlConnection("Server=localhost;Uid=root;Pwd=;");
                     conn->Open();

                  // create a db if not exists
                 try {
                      MySqlCommand ^cmd = gcnew MySqlCommand("CREATE DATABASE " + DBName, conn);
                      cmd->ExecuteNonQuery();
                      delete cmd;
                 }
                 catch (Exception ^ex) { }

                 // select our database
                 MySqlCommand ^cmd = gcnew MySqlCommand("USE " + DBName, conn);
                 cmd->ExecuteNonQuery();
                 delete cmd;

                 // create table "Table 1" if not exists
                 // WARNING: you can to use tables and columns names with spaces,
                 // but, you must use SPECIAL quote
                 // it's "`", not "'"!!!
                 cmd = gcnew MySqlCommand("CREATE TABLE IF NOT EXISTS `Table 1` (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, `text col` TEXT, `int col` INT);", conn);
                 cmd->ExecuteNonQuery();
                 delete cmd;

                 // get all tables from DB
                 DataTable ^dt = conn->GetSchema("Tables");
                 for (int i = 0; i < dt->Rows->Count; i++) {
                    if (dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_TYPE")]->ToString() == "BASE TABLE" &&
                        dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_SCHEMA")]->ToString() == DBName) {
                        comboBoxTables->Items->Add(dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_NAME")]->ToString());
                    }
                 }
                 delete dt;
             }
private: System::Void buttonOK_Click(System::Object^  sender, System::EventArgs^  e) {
             if (comboBoxTables->SelectedItem == nullptr) return;

             adapter = gcnew MySqlDataAdapter("SELECT * FROM `" + comboBoxTables->SelectedItem->ToString() + "`", conn);

             gcnew MySqlCommandBuilder(adapter);

             dtMain = gcnew DataTable();
             adapter->Fill(dtMain);
             dtMain->Columns["id"]->ReadOnly = true; // deprecate id field edit to prevent exceptions
             dataGridView1->DataSource = dtMain;
         }
private: System::Void Form1_FormClosed(System::Object^  sender, System::Windows::Forms::FormClosedEventArgs^  e) {
             if (adapter == nullptr) return;

             adapter->Update(dtMain);
         }
         // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
private: System::Void dataGridView1_DataError(System::Object^  sender, System::Windows::Forms::DataGridViewDataErrorEventArgs^  e) {
             if (dtMain->Columns[e->ColumnIndex]->DataType == Int64::typeid ||
                 dtMain->Columns[e->ColumnIndex]->DataType == Int32::typeid ||
                dtMain->Columns[e->ColumnIndex]->DataType == Int16::typeid) {
                Rectangle ^rectColumn;
                rectColumn = dataGridView1->GetColumnDisplayRectangle(e->ColumnIndex, false);

                Rectangle ^rectRow;
                rectRow = dataGridView1->GetRowDisplayRectangle(e->RowIndex, false);

                toolTip1->ToolTipTitle = "This field is for numbers only.";
                toolTip1->Show(" ",
                          dataGridView1,
                          rectColumn->Left, rectRow->Top + rectRow->Height);

                delete rectColumn;
                delete rectRow;
            }
         }
private: System::Void dataGridView1_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
             toolTip1->Hide(dataGridView1);
         }
};
}

SQLite

Important:

(C# and VB.NET only) set project configuration to x86.
Redistribution: System.Data.SQLite.dll and SQL.Interop.dll libraries must be copied into folder with exe. You must add a reference to it for use it in your project.

Code in C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Data.SQLite;

namespace SQLite_in_CSharp
{
    public partial class Form1 : Form
    {
        string DBPath;

        SQLiteConnection conn;
        SQLiteDataAdapter adapter;
        DataTable dtMain;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DBPath = Application.StartupPath + "\\test.db";

            // connect to DB
            // it will be created automatically if not exists
            conn = new SQLiteConnection("Data Source=" + DBPath);
            conn.Open();

            // create table "Table 1" if not exists
            // YOU CAN USE SPACES IN TABLE AND COLUMNS NAMES
            // BUT USE [] WITH TABLES AND '' WITH COLUMNS
            //
            // ALSO, SQLITE SUPPORTS "CREATE TABLE IF NOT EXISTS"
            using (SQLiteCommand cmd = new SQLiteCommand("CREATE TABLE IF NOT EXISTS [Table 1] (id INTEGER PRIMARY KEY AUTOINCREMENT, 'text column' TEXT, 'int column' INTEGER);", conn))
            {
                cmd.ExecuteNonQuery();
            }

            // get all tables from DB
            using (DataTable dt = conn.GetSchema("Tables"))
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_TYPE")].ToString() == "table")
                    {
                        comboBoxTables.Items.Add(dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")].ToString());
                    }
                }
            }
        }

        private void buttonOK_Click(object sender, EventArgs e)
        {
            if (comboBoxTables.SelectedItem == null) return;

            adapter = new SQLiteDataAdapter("SELECT * FROM [" + comboBoxTables.SelectedItem.ToString() + "]", conn);

            new SQLiteCommandBuilder(adapter);

            dtMain = new DataTable();
            adapter.Fill(dtMain);
            dtMain.Columns["id"].ReadOnly = true; // deprecate id field edit to prevent exceptions
            dataGridView1.DataSource = dtMain;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (adapter == null) return;

            adapter.Update(dtMain);
        }

        // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (dtMain.Columns[e.ColumnIndex].DataType == typeof(Int64) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int32) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int16))
            {
                Rectangle rectColumn;
                rectColumn = dataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, false);

                Rectangle rectRow;
                rectRow = dataGridView1.GetRowDisplayRectangle(e.RowIndex, false);

                toolTip1.ToolTipTitle = "This field is for numbers only.";
                toolTip1.Show(" ",
                          dataGridView1,
                          rectColumn.Left, rectRow.Top + rectRow.Height);
            }
        }

        private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
        {
            toolTip1.Hide(dataGridView1);
        }
    }
}

Code in VB.NET:

VB.NET

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Imports System.Data.SQLite ' SQLiteConnection, SQLiteDataAdapter, SQLiteCommandBuilder
' WARNING: Add a reference to System.Data.SQLite
' redistributable with System.Data.SQLite.dll and SQLite.Interop.dll

Public Class Form1

    Dim DBPath As String

    Dim conn As SQLiteConnection
    Dim adapter As SQLiteDataAdapter
    Dim dtMain As DataTable

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)

        DBPath = Application.StartupPath + "\test.db"

        ' connect to DB
        ' it will be created automatically if not exists
        conn = New SQLiteConnection("Data Source=" + DBPath)
        conn.Open()

        ' create table "Table 1" if not exists
        ' YOU CAN USE SPACES IN TABLE AND COLUMNS NAMES
        ' BUT USE [] WITH TABLES AND '' WITH COLUMNS
        '
        ' ALSO, SQLITE SUPPORTS "CREATE TABLE IF NOT EXISTS"
        Using cmd As New SQLiteCommand("CREATE TABLE IF NOT EXISTS [Table 1] (id INTEGER PRIMARY KEY AUTOINCREMENT, 'text column' TEXT, 'int column' INTEGER);", conn)
            cmd.ExecuteNonQuery()
        End Using

        ' get all tables from DB
        Using dt As DataTable = conn.GetSchema("Tables")
            For i As Integer = 0 To dt.Rows.Count - 1
                If dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_TYPE")).ToString() = "table" Then
                    ComboBoxTables.Items.Add(dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_NAME")).ToString())
                End If
            Next
        End Using

        '=======================================================
        'Service provided by Telerik (www.telerik.com)
        'Conversion powered by NRefactory.
        'Twitter: @telerik
        'Facebook: facebook.com/telerik
        '=======================================================

    End Sub

    Private Sub buttonOK_Click(ByVal sender As Object, ByVal e As EventArgs)

        If ComboBoxTables.SelectedItem Is Nothing Then
            Return
        End If

        adapter = New SQLiteDataAdapter("SELECT * FROM [" + ComboBoxTables.SelectedItem.ToString() + "]", conn)

        Dim builder = New SQLiteCommandBuilder(adapter)

        dtMain = New DataTable()
        adapter.Fill(dtMain)
        dtMain.Columns("id").[ReadOnly] = True
        ' deprecate id field edit to prevent exceptions
        DataGridView1.DataSource = dtMain

        '=======================================================
        'Service provided by Telerik (www.telerik.com)
        'Conversion powered by NRefactory.
        'Twitter: @telerik
        'Facebook: facebook.com/telerik
        '=======================================================

    End Sub

    Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As FormClosedEventArgs)
        If adapter Is Nothing Then
            Return
        End If

        adapter.Update(dtMain)
    End Sub

    ' show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
    Private Sub dataGridView1_DataError(ByVal sender As Object, ByVal e As DataGridViewDataErrorEventArgs)
        If dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int64) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int32) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int16) Then
            Dim rectColumn As Rectangle
            rectColumn = DataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, False)

            Dim rectRow As Rectangle
            rectRow = DataGridView1.GetRowDisplayRectangle(e.RowIndex, False)

            ToolTip1.ToolTipTitle = "This field is for numbers only."
            ToolTip1.Show(" ", DataGridView1, rectColumn.Left, rectRow.Top + rectRow.Height)
        End If
    End Sub

    Private Sub dataGridView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
        toolTip1.Hide(dataGridView1)
    End Sub

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

End Class

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Code in C++/CLI:

MC++

#pragma once

namespace SQLiteinCCLI {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    using namespace System::Data::SQLite;

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
            private: System::Windows::Forms::DataGridView^ dataGridView1;
        private: System::Windows::Forms::Label^ label1;
        private: System::Windows::Forms::ComboBox^ comboBoxTables;
        private: System::Windows::Forms::Button^ buttonOK;
        private: System::Windows::Forms::ToolTip^ toolTip1;
    private: System::ComponentModel::IContainer^  components;
    protected: 

    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        void InitializeComponent(void)
        {
            this->components = (gcnew System::ComponentModel::Container());
            this->dataGridView1 = (gcnew System::Windows::Forms::DataGridView());
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->comboBoxTables = (gcnew System::Windows::Forms::ComboBox());
            this->buttonOK = (gcnew System::Windows::Forms::Button());
            this->toolTip1 = (gcnew System::Windows::Forms::ToolTip(this->components));
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->BeginInit();
            this->SuspendLayout();
            // 
            // dataGridView1
            // 
            this->dataGridView1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) 
                | System::Windows::Forms::AnchorStyles::Left) 
                | System::Windows::Forms::AnchorStyles::Right));
            this->dataGridView1->ColumnHeadersHeightSizeMode = System::Windows::Forms::DataGridViewColumnHeadersHeightSizeMode::AutoSize;
            this->dataGridView1->Location = System::Drawing::Point(12, 44);
            this->dataGridView1->Name = L"dataGridView1";
            this->dataGridView1->ShowCellToolTips = false;
            this->dataGridView1->Size = System::Drawing::Size(493, 266);
            this->dataGridView1->TabIndex = 0;
            this->dataGridView1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::dataGridView1_MouseDown);
            this->dataGridView1->DataError += gcnew System::Windows::Forms::DataGridViewDataErrorEventHandler(this, &Form1::dataGridView1_DataError);
            // 
            // label1
            // 
            this->label1->Location = System::Drawing::Point(12, 9);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(65, 32);
            this->label1->TabIndex = 1;
            this->label1->Text = L"Select table to show:";
            // 
            // comboBoxTables
            // 
            this->comboBoxTables->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
            this->comboBoxTables->FormattingEnabled = true;
            this->comboBoxTables->Location = System::Drawing::Point(83, 12);
            this->comboBoxTables->Name = L"comboBoxTables";
            this->comboBoxTables->Size = System::Drawing::Size(165, 21);
            this->comboBoxTables->TabIndex = 2;
            // 
            // buttonOK
            // 
            this->buttonOK->Location = System::Drawing::Point(254, 12);
            this->buttonOK->Name = L"buttonOK";
            this->buttonOK->Size = System::Drawing::Size(56, 21);
            this->buttonOK->TabIndex = 3;
            this->buttonOK->Text = L"OK";
            this->buttonOK->UseVisualStyleBackColor = true;
            this->buttonOK->Click += gcnew System::EventHandler(this, &Form1::buttonOK_Click);
            // 
            // toolTip1
            // 
            this->toolTip1->AutoPopDelay = 5000;
            this->toolTip1->InitialDelay = 0;
            this->toolTip1->IsBalloon = true;
            this->toolTip1->ReshowDelay = 0;
            this->toolTip1->ToolTipIcon = System::Windows::Forms::ToolTipIcon::Warning;
            this->toolTip1->UseAnimation = false;
            this->toolTip1->UseFading = false;
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(517, 322);
            this->Controls->Add(this->buttonOK);
            this->Controls->Add(this->comboBoxTables);
            this->Controls->Add(this->label1);
            this->Controls->Add(this->dataGridView1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->FormClosed += gcnew System::Windows::Forms::FormClosedEventHandler(this, &Form1::Form1_FormClosed);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->EndInit();
            this->ResumeLayout(false);

        }
#pragma endregion
        String ^DBPath;

        SQLiteConnection ^conn;
        SQLiteDataAdapter ^adapter;
        DataTable ^dtMain;

    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 DBPath = Application::StartupPath + "\\test.db";

                 // connect to DB
                 // it will be created automatically if not exists
                 conn = gcnew SQLiteConnection("Data Source=" + DBPath);
                 conn->Open();

                 // create table "Table 1" if not exists
                 // YOU CAN USE SPACES IN TABLE AND COLUMNS NAMES
                 // BUT USE [] WITH TABLES AND '' WITH COLUMNS
                 //
                 // ALSO, SQLITE SUPPORTS "CREATE TABLE IF NOT EXISTS"
                 SQLiteCommand ^cmd = gcnew SQLiteCommand("CREATE TABLE IF NOT EXISTS [Table 1] (id INTEGER PRIMARY KEY AUTOINCREMENT, 'text column' TEXT, 'int column' INTEGER);", conn);
                 cmd->ExecuteNonQuery();
                 delete cmd;

                 // get all tables from DB
                 DataTable ^dt = conn->GetSchema("Tables");
                 for (int i = 0; i < dt->Rows->Count; i++)
                 {
                    if (dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_TYPE")]->ToString() == "table")
                    {
                        comboBoxTables->Items->Add(dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_NAME")]->ToString());
                    }
                 }
                 delete dt;
             }
private: System::Void buttonOK_Click(System::Object^  sender, System::EventArgs^  e) {
             if (comboBoxTables->SelectedItem == nullptr) return;

             adapter = gcnew SQLiteDataAdapter("SELECT * FROM [" + comboBoxTables->SelectedItem->ToString() + "]", conn);

             gcnew SQLiteCommandBuilder(adapter);

             dtMain = gcnew DataTable();
             adapter->Fill(dtMain);
             dtMain->Columns["id"]->ReadOnly = true; // deprecate id field edit to prevent exceptions
             dataGridView1->DataSource = dtMain;
         }
private: System::Void Form1_FormClosed(System::Object^  sender, System::Windows::Forms::FormClosedEventArgs^  e) {
             if (adapter == nullptr) return;

             adapter->Update(dtMain);
         }
         // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
private: System::Void dataGridView1_DataError(System::Object^  sender, System::Windows::Forms::DataGridViewDataErrorEventArgs^  e) {
             if (dtMain->Columns[e->ColumnIndex]->DataType == Int64::typeid ||
                 dtMain->Columns[e->ColumnIndex]->DataType == Int32::typeid ||
                dtMain->Columns[e->ColumnIndex]->DataType == Int16::typeid)
            {
                Rectangle ^rectColumn;
                rectColumn = dataGridView1->GetColumnDisplayRectangle(e->ColumnIndex, false);

                Rectangle ^rectRow;
                rectRow = dataGridView1->GetRowDisplayRectangle(e->RowIndex, false);

                toolTip1->ToolTipTitle = "This field is for numbers only.";
                toolTip1->Show(" ",
                          dataGridView1,
                          rectColumn->Left, rectRow->Top + rectRow->Height);

                delete rectColumn;
                delete rectRow;
            }
         }
private: System::Void dataGridView1_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
             toolTip1->Hide(dataGridView1);
         }
};
}

SQL Server 2008 R2

Important:

check if SQL Server services enabled, on the control panel's component Services.
Redistribution: Microsoft SQL Server 2008 Express: http://www.microsoft.com/ru-ru/download/details.aspx?id=1695

Code in C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Data.SqlClient;

namespace SQL_Server_2008_R2_in_CSharp
{
    public partial class Form1 : Form
    {
        string ServerName, DBName;

        SqlConnection conn;
        SqlDataAdapter adapter;
        DataTable dtMain;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            ServerName = @"localhost\sqlexpress";
            DBName = "test";

            // connect to server
            // to database "master" to check if our database exists
            // to create it if it isn't exists
            conn = new SqlConnection("Server=" + ServerName + ";Trusted_Connection=Yes;Database=master;");
            conn.Open();

            // create database if not exists
            try
            {
                using (SqlCommand cmd = new SqlCommand(String.Format("CREATE DATABASE [{0}] ON (" +
                                                    "    NAME = {0}, " +
                                                    "    FILENAME = '" + Application.StartupPath + "\\{0}.mdf'" +
                                                    ");",
                                                    DBName), conn))
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch { }

            // connect to db
            conn = new SqlConnection("Database=" + DBName + ";Server=" + ServerName + ";Trusted_Connection=Yes;");
            conn.Open();

            // create table "Table 1" if not exists
            using (SqlCommand cmd = new SqlCommand(String.Format(
                                      "IF NOT EXISTS (" +
                                      "    SELECT [name] " +
                                      "    FROM sys.tables " +
                                      "    WHERE [name] = '{0}'" +
                                      ") " +
                                      "CREATE TABLE [{0}] (" +
                                      "    id [INT] IDENTITY(1,1) PRIMARY KEY CLUSTERED, " +
                                      "    [text column] [TEXT] NULL, " +
                                      "    [int column] [INT] NULL " +
                                      ")",
                                      "Table 1"), conn))
            {
                cmd.ExecuteNonQuery();
            }

            // get all tables from DB
            using (DataTable dt = conn.GetSchema("Tables"))
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_TYPE")].ToString() == "BASE TABLE")
                    {
                        comboBoxTables.Items.Add(dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")].ToString());
                    }
                }
            }
        }

        private void buttonOK_Click(object sender, EventArgs e)
        {
            if (comboBoxTables.SelectedItem == null) return;

            adapter = new SqlDataAdapter("SELECT * FROM [" + comboBoxTables.SelectedItem.ToString() + "]", conn);

            new SqlCommandBuilder(adapter);

            dtMain = new DataTable();
            adapter.Fill(dtMain);
            dtMain.Columns["id"].ReadOnly = true; // deprecate id field edit to prevent exceptions
            dataGridView1.DataSource = dtMain;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (adapter == null) return;

            adapter.Update(dtMain);
        }

        // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (dtMain.Columns[e.ColumnIndex].DataType == typeof(Int64) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int32) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int16))
            {
                Rectangle rectColumn;
                rectColumn = dataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, false);

                Rectangle rectRow;
                rectRow = dataGridView1.GetRowDisplayRectangle(e.RowIndex, false);

                toolTip1.ToolTipTitle = "This field is for numbers only.";
                toolTip1.Show(" ",
                          dataGridView1,
                          rectColumn.Left, rectRow.Top + rectRow.Height);
            }
        }

        private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
        {
            toolTip1.Hide(dataGridView1);
        }
    }
}

Code in VB.NET:

VB.NET

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Imports System.Data.SqlClient ' SqlConnection, SqlDataAdapter, SqlCommandBuilder

Public Class Form1
    Private DBName, ServerName As String

    Private conn As SqlConnection
    Private adapter As SqlDataAdapter
    Private dtMain As DataTable

    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
        ServerName = "localhost\sqlexpress"
        DBName = "test"

        ' connect to server
        ' to database "master" to check if our database exists
        ' to create it if it isn't exists
        conn = New SqlConnection("Server=" + ServerName + ";Trusted_Connection=Yes;Database=master;")
        conn.Open()

        ' create database if not exists
        Try
            Using cmd As New SqlCommand([String].Format("CREATE DATABASE [{0}] ON (" + "    NAME = {0}, " + "    FILENAME = '" + Application.StartupPath + "\{0}.mdf'" + ");", DBName), conn)
                cmd.ExecuteNonQuery()
            End Using
        Catch
        End Try

        ' connect to db
        conn = New SqlConnection("Database=" + DBName + ";Server=" + ServerName + ";Trusted_Connection=Yes;")
        conn.Open()

        ' create table "Table 1" if not exists
        Using cmd As New SqlCommand([String].Format("IF NOT EXISTS (" + "    SELECT [name] " + "    FROM sys.tables " + "    WHERE [name] = '{0}'" + ") " + "CREATE TABLE [{0}] (" + "    id [INT] IDENTITY(1,1) PRIMARY KEY CLUSTERED, " + "    [text column] [TEXT] NULL, " + "    [int column] [INT] NULL " + ")", "Table 1"), conn)
            cmd.ExecuteNonQuery()
        End Using

        ' get all tables from DB
        Using dt As DataTable = conn.GetSchema("Tables")
            For i As Integer = 0 To dt.Rows.Count - 1
                If dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_TYPE")).ToString() = "BASE TABLE" Then
                    ComboBoxTables.Items.Add(dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_NAME")).ToString())
                End If
            Next
        End Using

        '=======================================================
        'Service provided by Telerik (www.telerik.com)
        'Conversion powered by NRefactory.
        'Twitter: @telerik
        'Facebook: facebook.com/telerik
        '=======================================================
    End Sub

    Private Sub buttonOK_Click(ByVal sender As Object, ByVal e As EventArgs)
        If ComboBoxTables.SelectedItem Is Nothing Then
            Return
        End If

        adapter = New SqlDataAdapter("SELECT * FROM [" + ComboBoxTables.SelectedItem.ToString() + "]", conn)

        Dim builder = New SqlCommandBuilder(adapter)

        dtMain = New DataTable()
        adapter.Fill(dtMain)
        dtMain.Columns("id").[ReadOnly] = True
        ' deprecate id field edit to prevent exceptions
        DataGridView1.DataSource = dtMain

        '=======================================================
        'Service provided by Telerik (www.telerik.com)
        'Conversion powered by NRefactory.
        'Twitter: @telerik
        'Facebook: facebook.com/telerik
        '=======================================================

    End Sub

    Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As FormClosedEventArgs)
        If adapter Is Nothing Then
            Return
        End If

        adapter.Update(dtMain)
    End Sub

    ' show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
    Private Sub dataGridView1_DataError(ByVal sender As Object, ByVal e As DataGridViewDataErrorEventArgs)
        If dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int64) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int32) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int16) Then
            Dim rectColumn As Rectangle
            rectColumn = DataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, False)

            Dim rectRow As Rectangle
            rectRow = DataGridView1.GetRowDisplayRectangle(e.RowIndex, False)

            ToolTip1.ToolTipTitle = "This field is for numbers only."
            ToolTip1.Show(" ", DataGridView1, rectColumn.Left, rectRow.Top + rectRow.Height)
        End If
    End Sub

    Private Sub dataGridView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
        toolTip1.Hide(dataGridView1)
    End Sub

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

End Class

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Code in C++/CLI:

MC++

#pragma once

namespace SQLServer2008R2inCCLI {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    using namespace System::Data::SqlClient;

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
            private: System::Windows::Forms::DataGridView^ dataGridView1;
        private: System::Windows::Forms::Label^ label1;
        private: System::Windows::Forms::ComboBox^ comboBoxTables;
        private: System::Windows::Forms::Button^ buttonOK;
        private: System::Windows::Forms::ToolTip^ toolTip1;
    private: System::ComponentModel::IContainer^  components;
    protected: 

    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        void InitializeComponent(void)
        {
            this->components = (gcnew System::ComponentModel::Container());
            this->dataGridView1 = (gcnew System::Windows::Forms::DataGridView());
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->comboBoxTables = (gcnew System::Windows::Forms::ComboBox());
            this->buttonOK = (gcnew System::Windows::Forms::Button());
            this->toolTip1 = (gcnew System::Windows::Forms::ToolTip(this->components));
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->BeginInit();
            this->SuspendLayout();
            // 
            // dataGridView1
            // 
            this->dataGridView1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) 
                | System::Windows::Forms::AnchorStyles::Left) 
                | System::Windows::Forms::AnchorStyles::Right));
            this->dataGridView1->ColumnHeadersHeightSizeMode = System::Windows::Forms::DataGridViewColumnHeadersHeightSizeMode::AutoSize;
            this->dataGridView1->Location = System::Drawing::Point(12, 44);
            this->dataGridView1->Name = L"dataGridView1";
            this->dataGridView1->ShowCellToolTips = false;
            this->dataGridView1->Size = System::Drawing::Size(493, 266);
            this->dataGridView1->TabIndex = 0;
            this->dataGridView1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::dataGridView1_MouseDown);
            this->dataGridView1->DataError += gcnew System::Windows::Forms::DataGridViewDataErrorEventHandler(this, &Form1::dataGridView1_DataError);
            // 
            // label1
            // 
            this->label1->Location = System::Drawing::Point(12, 9);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(65, 32);
            this->label1->TabIndex = 1;
            this->label1->Text = L"Select table to show:";
            // 
            // comboBoxTables
            // 
            this->comboBoxTables->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
            this->comboBoxTables->FormattingEnabled = true;
            this->comboBoxTables->Location = System::Drawing::Point(83, 12);
            this->comboBoxTables->Name = L"comboBoxTables";
            this->comboBoxTables->Size = System::Drawing::Size(165, 21);
            this->comboBoxTables->TabIndex = 2;
            // 
            // buttonOK
            // 
            this->buttonOK->Location = System::Drawing::Point(254, 12);
            this->buttonOK->Name = L"buttonOK";
            this->buttonOK->Size = System::Drawing::Size(56, 21);
            this->buttonOK->TabIndex = 3;
            this->buttonOK->Text = L"OK";
            this->buttonOK->UseVisualStyleBackColor = true;
            this->buttonOK->Click += gcnew System::EventHandler(this, &Form1::buttonOK_Click);
            // 
            // toolTip1
            // 
            this->toolTip1->AutoPopDelay = 5000;
            this->toolTip1->InitialDelay = 0;
            this->toolTip1->IsBalloon = true;
            this->toolTip1->ReshowDelay = 0;
            this->toolTip1->ToolTipIcon = System::Windows::Forms::ToolTipIcon::Warning;
            this->toolTip1->UseAnimation = false;
            this->toolTip1->UseFading = false;
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(517, 322);
            this->Controls->Add(this->buttonOK);
            this->Controls->Add(this->comboBoxTables);
            this->Controls->Add(this->label1);
            this->Controls->Add(this->dataGridView1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->FormClosed += gcnew System::Windows::Forms::FormClosedEventHandler(this, &Form1::Form1_FormClosed);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->EndInit();
            this->ResumeLayout(false);

        }
#pragma endregion
        String ^ServerName, ^DBName;

        SqlConnection ^conn;
        SqlDataAdapter ^adapter;
        DataTable ^dtMain;

    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 ServerName = "localhost\\sqlexpress";
                 DBName = "test";

                 // connect to server
                 // to database "master" to check if our database exists
                 // to create it if it isn't exists
                 conn = gcnew SqlConnection("Server=" + ServerName + ";Trusted_Connection=Yes;Database=master;");
                 conn->Open();

                 // create database if not exists
                 try {
                     SqlCommand ^cmd = gcnew SqlCommand(String::Format("CREATE DATABASE [{0}] ON (" +
                                                    "    NAME = {0}, " +
                                                    "    FILENAME = '" + Application::StartupPath + "\\{0}.mdf'" +
                                                    ");",
                                                    DBName), conn);
                     cmd->ExecuteNonQuery();
                     delete cmd;
                 }
                 catch (Exception ^ex) { }

                 // connect to db
                 conn = gcnew SqlConnection("Database=" + DBName + ";Server=" + ServerName + ";Trusted_Connection=Yes;");
                 conn->Open();

                 // create table "Table 1" if not exists
                 SqlCommand ^cmd = gcnew SqlCommand(String::Format(
                                      "IF NOT EXISTS (" +
                                      "    SELECT [name] " +
                                      "    FROM sys.tables " +
                                      "    WHERE [name] = '{0}'" +
                                      ") " +
                                      "CREATE TABLE [{0}] (" +
                                      "    id [INT] IDENTITY(1,1) PRIMARY KEY CLUSTERED, " +
                                      "    [text column] [TEXT] NULL, " +
                                      "    [int column] [INT] NULL " +
                                      ")",
                                      "Table 1"), conn);
                 cmd->ExecuteNonQuery();
                 delete cmd;

                 // get all tables from DB
                 DataTable ^dt = conn->GetSchema("Tables");
                 for (int i = 0; i < dt->Rows->Count; i++) {
                    if (dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_TYPE")]->ToString() == "BASE TABLE") {
                        comboBoxTables->Items->Add(dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_NAME")]->ToString());
                    }
                 }
                 delete dt;
             }
private: System::Void buttonOK_Click(System::Object^  sender, System::EventArgs^  e) {
             if (comboBoxTables->SelectedItem == nullptr) return;

             adapter = gcnew SqlDataAdapter("SELECT * FROM [" + comboBoxTables->SelectedItem->ToString() + "]", conn);

             gcnew SqlCommandBuilder(adapter);

             dtMain = gcnew DataTable();
             adapter->Fill(dtMain);
             dtMain->Columns["id"]->ReadOnly = true; // deprecate id field edit to prevent exceptions
             dataGridView1->DataSource = dtMain;
         }
private: System::Void Form1_FormClosed(System::Object^  sender, System::Windows::Forms::FormClosedEventArgs^  e) {
             if (adapter == nullptr) return;

             adapter->Update(dtMain);
         }
         // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
private: System::Void dataGridView1_DataError(System::Object^  sender, System::Windows::Forms::DataGridViewDataErrorEventArgs^  e) {
             if (dtMain->Columns[e->ColumnIndex]->DataType == Int64::typeid ||
                 dtMain->Columns[e->ColumnIndex]->DataType == Int32::typeid ||
                dtMain->Columns[e->ColumnIndex]->DataType == Int16::typeid)
            {
                Rectangle ^rectColumn;
                rectColumn = dataGridView1->GetColumnDisplayRectangle(e->ColumnIndex, false);

                Rectangle ^rectRow;
                rectRow = dataGridView1->GetRowDisplayRectangle(e->RowIndex, false);

                toolTip1->ToolTipTitle = "This field is for numbers only.";
                toolTip1->Show(" ",
                          dataGridView1,
                          rectColumn->Left, rectRow->Top + rectRow->Height);

                delete rectColumn;
                delete rectRow;
            }
         }
private: System::Void dataGridView1_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
             toolTip1->Hide(dataGridView1);
         }
};
}

SQL Server Compact 3.5

Important:

add a reference to System.Data.SqlServerCe (tested on its 3.5 version).

Code in C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.IO;
using System.Data.SqlServerCe;

namespace SQL_Server_CE_in_CSharp
{
    public partial class Form1 : Form
    {
        string DBPath;
        
        SqlCeConnection conn;
        SqlCeDataAdapter adapter;
        DataTable dtMain;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DBPath = Application.StartupPath + "\\test.sdf";

            // create db if not exists
            if (!File.Exists(DBPath))
            {
                using (SqlCeEngine se = new SqlCeEngine("Data Source=" + DBPath))
                {
                    se.CreateDatabase();
                }              
            }

            // connect to db
            conn = new SqlCeConnection("Data Source=" + DBPath);
            conn.Open();

            // create table "Table 1" if not exists
            try
            {
                using (SqlCeCommand cmd = new SqlCeCommand("CREATE TABLE [Table 1] (id INTEGER IDENTITY(1,1) PRIMARY KEY, [text column] NTEXT, [int column] INT);", conn))
                {
                    cmd.ExecuteNonQuery();
                }
            }
            catch { }

            // get all tables from DB
            using (DataTable dt = new DataTable())
            {
                using (SqlCeDataAdapter ad = new SqlCeDataAdapter("SELECT table_name FROM information_schema.tables WHERE TABLE_TYPE <> 'VIEW'", conn))
                {
                    ad.Fill(dt);
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        comboBoxTables.Items.Add(dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")].ToString());
                    }
                }
            }
        }

        private void buttonOK_Click(object sender, EventArgs e)
        {
            if (comboBoxTables.SelectedItem == null) return;

            adapter = new SqlCeDataAdapter("SELECT * FROM [" + comboBoxTables.SelectedItem.ToString() + "]", conn);

            new SqlCeCommandBuilder(adapter);

            dtMain = new DataTable();
            adapter.Fill(dtMain);
            dtMain.Columns["id"].ReadOnly = true; // deprecate id field edit to prevent exceptions
            dataGridView1.DataSource = dtMain;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (adapter == null) return;

            adapter.Update(dtMain);
        }

        // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)
        {
            if (dtMain.Columns[e.ColumnIndex].DataType == typeof(Int64) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int32) ||
                dtMain.Columns[e.ColumnIndex].DataType == typeof(Int16))
            {
                Rectangle rectColumn;
                rectColumn = dataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, false);

                Rectangle rectRow;
                rectRow = dataGridView1.GetRowDisplayRectangle(e.RowIndex, false);

                toolTip1.ToolTipTitle = "This field is for numbers only.";
                toolTip1.Show(" ",
                          dataGridView1,
                          rectColumn.Left, rectRow.Top + rectRow.Height);
            }
        }

        private void dataGridView1_MouseDown(object sender, MouseEventArgs e)
        {
            toolTip1.Hide(dataGridView1);
        }
    }
}

Code in VB.NET:

VB.NET

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Imports System.IO 'File.Exists()
Imports System.Data.SqlServerCe ' SqlCeConnection, SqlCeDataAdapter, SqlCeCommandBuilder
' WARNING: Add a reference to System.Data.SqlServerCe!

Public Class Form1

    Dim DBPath As String

    Dim conn As SqlCeConnection
    Dim adapter As SqlCeDataAdapter
    Dim dtMain As DataTable

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)

        DBPath = Application.StartupPath + "\test.sdf"

        ' create db if not exists
        If Not File.Exists(DBPath) Then
            Using se As New SqlCeEngine("Data Source=" + DBPath)
                se.CreateDatabase()
            End Using
        End If

        ' connect to db
        conn = New SqlCeConnection("Data Source=" + DBPath)
        conn.Open()

        ' create table "Table 1" if not exists
        Try
            Using cmd As New SqlCeCommand("CREATE TABLE [Table 1] (id INTEGER IDENTITY(1,1) PRIMARY KEY, [text column] NTEXT, [int column] INT);", conn)
                cmd.ExecuteNonQuery()
            End Using
        Catch
        End Try

        ' get all tables from DB
        Using dt As New DataTable()
            Using ad As New SqlCeDataAdapter("SELECT table_name FROM information_schema.tables WHERE TABLE_TYPE <> 'VIEW'", conn)
                ad.Fill(dt)
                For i As Integer = 0 To dt.Rows.Count - 1
                    ComboBoxTables.Items.Add(dt.Rows(i).ItemArray(dt.Columns.IndexOf("TABLE_NAME")).ToString())
                Next
            End Using
        End Using

        '=======================================================
        'Service provided by Telerik (www.telerik.com)
        'Conversion powered by NRefactory.
        'Twitter: @telerik
        'Facebook: facebook.com/telerik
        '=======================================================
    End Sub

    Private Sub buttonOK_Click(ByVal sender As Object, ByVal e As EventArgs)

        If ComboBoxTables.SelectedItem Is Nothing Then
            Return
        End If

        adapter = New SqlCeDataAdapter("SELECT * FROM [" + ComboBoxTables.SelectedItem.ToString() + "]", conn)

        Dim builder = New SqlCeCommandBuilder(adapter)

        dtMain = New DataTable()
        adapter.Fill(dtMain)
        dtMain.Columns("id").[ReadOnly] = True
        ' deprecate id field edit to prevent exceptions
        DataGridView1.DataSource = dtMain

        '=======================================================
        'Service provided by Telerik (www.telerik.com)
        'Conversion powered by NRefactory.
        'Twitter: @telerik
        'Facebook: facebook.com/telerik
        '=======================================================

    End Sub

    Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As FormClosedEventArgs)
        If adapter Is Nothing Then
            Return
        End If

        adapter.Update(dtMain)
    End Sub

    ' show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
    Private Sub dataGridView1_DataError(ByVal sender As Object, ByVal e As DataGridViewDataErrorEventArgs)
        If dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int64) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int32) Or _
        dtMain.Columns(e.ColumnIndex).DataType Is GetType(Int16) Then
            Dim rectColumn As Rectangle
            rectColumn = DataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, False)

            Dim rectRow As Rectangle
            rectRow = DataGridView1.GetRowDisplayRectangle(e.RowIndex, False)

            ToolTip1.ToolTipTitle = "This field is for numbers only."
            ToolTip1.Show(" ", DataGridView1, rectColumn.Left, rectRow.Top + rectRow.Height)
        End If
    End Sub

    Private Sub dataGridView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
        toolTip1.Hide(dataGridView1)
    End Sub

    '=======================================================
    'Service provided by Telerik (www.telerik.com)
    'Conversion powered by NRefactory.
    'Twitter: @telerik
    'Facebook: facebook.com/telerik
    '=======================================================

End Class

'=======================================================
'Service provided by Telerik (www.telerik.com)
'Conversion powered by NRefactory.
'Twitter: @telerik
'Facebook: facebook.com/telerik
'=======================================================

Code in C++/CLI:

MC++

#pragma once

namespace SQLServerCEinCCLI {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    using namespace System::IO; // File::Exists()
    using namespace System::Data::SqlServerCe;

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }

    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
            private: System::Windows::Forms::DataGridView^ dataGridView1;
        private: System::Windows::Forms::Label^ label1;
        private: System::Windows::Forms::ComboBox^ comboBoxTables;
        private: System::Windows::Forms::Button^ buttonOK;
        private: System::Windows::Forms::ToolTip^ toolTip1;
    private: System::ComponentModel::IContainer^  components;
    protected: 

    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>

#pragma region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        void InitializeComponent(void)
        {
            this->components = (gcnew System::ComponentModel::Container());
            this->dataGridView1 = (gcnew System::Windows::Forms::DataGridView());
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->comboBoxTables = (gcnew System::Windows::Forms::ComboBox());
            this->buttonOK = (gcnew System::Windows::Forms::Button());
            this->toolTip1 = (gcnew System::Windows::Forms::ToolTip(this->components));
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->BeginInit();
            this->SuspendLayout();
            // 
            // dataGridView1
            // 
            this->dataGridView1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) 
                | System::Windows::Forms::AnchorStyles::Left) 
                | System::Windows::Forms::AnchorStyles::Right));
            this->dataGridView1->ColumnHeadersHeightSizeMode = System::Windows::Forms::DataGridViewColumnHeadersHeightSizeMode::AutoSize;
            this->dataGridView1->Location = System::Drawing::Point(12, 44);
            this->dataGridView1->Name = L"dataGridView1";
            this->dataGridView1->ShowCellToolTips = false;
            this->dataGridView1->Size = System::Drawing::Size(493, 266);
            this->dataGridView1->TabIndex = 0;
            this->dataGridView1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::dataGridView1_MouseDown);
            this->dataGridView1->DataError += gcnew System::Windows::Forms::DataGridViewDataErrorEventHandler(this, &Form1::dataGridView1_DataError);
            // 
            // label1
            // 
            this->label1->Location = System::Drawing::Point(12, 9);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(65, 32);
            this->label1->TabIndex = 1;
            this->label1->Text = L"Select table to show:";
            // 
            // comboBoxTables
            // 
            this->comboBoxTables->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
            this->comboBoxTables->FormattingEnabled = true;
            this->comboBoxTables->Location = System::Drawing::Point(83, 12);
            this->comboBoxTables->Name = L"comboBoxTables";
            this->comboBoxTables->Size = System::Drawing::Size(165, 21);
            this->comboBoxTables->TabIndex = 2;
            // 
            // buttonOK
            // 
            this->buttonOK->Location = System::Drawing::Point(254, 12);
            this->buttonOK->Name = L"buttonOK";
            this->buttonOK->Size = System::Drawing::Size(56, 21);
            this->buttonOK->TabIndex = 3;
            this->buttonOK->Text = L"OK";
            this->buttonOK->UseVisualStyleBackColor = true;
            this->buttonOK->Click += gcnew System::EventHandler(this, &Form1::buttonOK_Click);
            // 
            // toolTip1
            // 
            this->toolTip1->AutoPopDelay = 5000;
            this->toolTip1->InitialDelay = 0;
            this->toolTip1->IsBalloon = true;
            this->toolTip1->ReshowDelay = 0;
            this->toolTip1->ToolTipIcon = System::Windows::Forms::ToolTipIcon::Warning;
            this->toolTip1->UseAnimation = false;
            this->toolTip1->UseFading = false;
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(517, 322);
            this->Controls->Add(this->buttonOK);
            this->Controls->Add(this->comboBoxTables);
            this->Controls->Add(this->label1);
            this->Controls->Add(this->dataGridView1);
            this->Name = L"Form1";
            this->Text = L"Form1";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->FormClosed += gcnew System::Windows::Forms::FormClosedEventHandler(this, &Form1::Form1_FormClosed);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->dataGridView1))->EndInit();
            this->ResumeLayout(false);

        }
#pragma endregion
        String ^DBPath;

        SqlCeConnection ^conn;
        SqlCeDataAdapter ^adapter;
        DataTable ^dtMain;

    private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 DBPath = Application::StartupPath + "\\test.sdf";

                 // create db if not exists
                 if (!File::Exists(DBPath)) {
                     SqlCeEngine ^se = gcnew SqlCeEngine("Data Source=" + DBPath);
                     se->CreateDatabase();
                     delete se;
                 }

                 // connect to db
                 conn = gcnew SqlCeConnection("Data Source=" + DBPath);
                 conn->Open();

                 // create table "Table 1" if not exists
                 try {
                     SqlCeCommand ^cmd = gcnew SqlCeCommand("CREATE TABLE [Table 1] (id INTEGER IDENTITY(1,1) PRIMARY KEY, [text column] NTEXT, [int column] INT);", conn);
                     cmd->ExecuteNonQuery();
                     delete cmd;
                 }
                 catch (Exception ^ex) {
                 }

                 // get all tables from DB
                 DataTable ^dt = gcnew DataTable();
                 SqlCeDataAdapter ^ad = gcnew SqlCeDataAdapter("SELECT table_name FROM information_schema.tables WHERE TABLE_TYPE <> 'VIEW'", conn);
                 ad->Fill(dt);
                 for (int i = 0; i < dt->Rows->Count; i++) {
                    comboBoxTables->Items->Add(dt->Rows[i]->ItemArray[dt->Columns->IndexOf("TABLE_NAME")]->ToString());
                 }
                 delete ad;
                 delete dt;
             }
private: System::Void buttonOK_Click(System::Object^  sender, System::EventArgs^  e) {
             if (comboBoxTables->SelectedItem == nullptr) return;

             adapter = gcnew SqlCeDataAdapter("SELECT * FROM [" + comboBoxTables->SelectedItem->ToString() + "]", conn);

             gcnew SqlCeCommandBuilder(adapter);

             dtMain = gcnew DataTable();
             adapter->Fill(dtMain);
             dtMain->Columns["id"]->ReadOnly = true; // deprecate id field edit to prevent exceptions
             dataGridView1->DataSource = dtMain;
         }
private: System::Void Form1_FormClosed(System::Object^  sender, System::Windows::Forms::FormClosedEventArgs^  e) {
             if (adapter == nullptr) return;

             adapter->Update(dtMain);
         }
         // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell
private: System::Void dataGridView1_DataError(System::Object^  sender, System::Windows::Forms::DataGridViewDataErrorEventArgs^  e) {
             if (dtMain->Columns[e->ColumnIndex]->DataType == Int64::typeid ||
                 dtMain->Columns[e->ColumnIndex]->DataType == Int32::typeid ||
                dtMain->Columns[e->ColumnIndex]->DataType == Int16::typeid)
            {
                Rectangle ^rectColumn;
                rectColumn = dataGridView1->GetColumnDisplayRectangle(e->ColumnIndex, false);

                Rectangle ^rectRow;
                rectRow = dataGridView1->GetRowDisplayRectangle(e->RowIndex, false);

                toolTip1->ToolTipTitle = "This field is for numbers only.";
                toolTip1->Show(" ",
                          dataGridView1,
                          rectColumn->Left, rectRow->Top + rectRow->Height);

                delete rectColumn;
                delete rectRow;
            }
         }
private: System::Void dataGridView1_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
             toolTip1->Hide(dataGridView1);
         }
};
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)