i want to add a combo box for selecting a com port and baud rate in my program, can anyone help me ? :D Thank you for your attention

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VB

Imports System.IO
Imports System.IO.Ports
Imports System.Threading

Public Class Form1
    Shared _continue As Boolean
    Shared _serialPort As SerialPort
    Dim keysPressed As New HashSet(Of Keys)

    

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        With SerialPort1
            .Close()
            .PortName = "COM10"
            .BaudRate = 9600
            .Parity = Parity.None
            .DataBits = 8
            .StopBits = StopBits.One
            .DtrEnable = True
            .RtsEnable = True
            .ReceivedBytesThreshold = 1
            .Open()
        End With
    End Sub

    Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
        keysPressed.Add(e.KeyCode)

        If keysPressed.Contains(Keys.Left) AndAlso keysPressed.Contains(Keys.Right) Then
            SerialPort1.Write("Q")
            Label1.Text = "Мирување"
            Label1.Text = "Мирување"
        ElseIf keysPressed.Contains(Keys.Left) Then
            SerialPort1.Write("L")
            Label1.Text = "Лево"

        ElseIf keysPressed.Contains(Keys.Right) Then
            SerialPort1.Write("D")
            Label1.Text = "Десно"
        End If


        If keysPressed.Contains(Keys.Up) AndAlso keysPressed.Contains(Keys.Down) Then
            SerialPort1.Write("E")
            Label1.Text = "Мирување"
            Label1.Text = "Мирување"
        ElseIf keysPressed.Contains(Keys.Up) Then
            SerialPort1.Write("N")
            Label1.Text = "Напред"
        ElseIf keysPressed.Contains(Keys.Down) Then
            SerialPort1.Write("S")
            Label1.Text = "Назад"
        End If

        Refresh()

    End Sub

    Private Sub Form1_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyUp
        Select Case e.KeyCode
            Case Keys.Left
                SerialPort1.Write("Q")
                Label1.Text = "Мирување"
                keysPressed.Clear()
            Case Keys.Right
                SerialPort1.Write("W")
                Label1.Text = "Мирување"
                keysPressed.Clear()
            Case Keys.Up
                SerialPort1.Write("E")
                Label1.Text = "Мирување"
                keysPressed.Clear()
            Case Keys.Down
                SerialPort1.Write("R")
                Label1.Text = "Мирување"
                keysPressed.Clear()
        End Select
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub
End Class

and here are the project files
http://www.mediafire.com/download/hpc9btpsyz27y5c/Project+files.rar</a>[^]

Posted 26-Oct-13 22:51pm

Martin Ozzy Velickovski

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OriginalGriff 27-Oct-13 4:57am

And?
You haven't told us what problem you are having, or what you have tried, or where you are stuck.
What help do you need from us?

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borntrouble · Answer 1 · 2013-10-27T06:16:00

First add a combobox to your Form

In your Form Load method add

VB

ComboBox1.DataSource = SerialPort.GetPortNames()

GetPortNames() returns all the ports available on your machine.

For baud rate and other info on the port select you can find add this to your Form Load method

VB

ComboBox1.DataSource = SerialPort.GetPortNames()

Dim sport As New SerialPort(ComboBox1.Text)
TextBox1.Text = sport.BaudRate

and further to the combo box index changed event method you can add the below

VB

Private Sub ComboBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged
    Dim sport As New SerialPort(ComboBox1.Text)
    TextBox1.Text = sport.BaudRate
End Sub

hope this helps.