search between dates

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Hi all,

I am trying to search database between 2 dates that come from datetimepicker but I have got this error ( fill:selectcommand.connection property has not been initialized ). I don't know what is wrong with my code as I am still in the VB.net nursery.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            Dim connstrg As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=M:\REGISTER.mdb;Persist Security Info=True;Jet OLEDB:Database Password=he123;"
            Dim conn As New OleDbConnection(connstrg)
            Dim DA As New OleDbDataAdapter("select* FROM reg", conn)
            Dim ds As New DataSet
            Dim com As New OleDbCommand
            Dim dd1 As Date = Me.DateTimePicker1.Value.Date

            Dim dd2 As Date = Me.DateTimePicker2.Value.Date
            conn.Open()
            com.CommandType = CommandType.Text
            com.CommandText = "select * from reg where [date] BETWEEN  & dd1 &  And  & dd2"
            DA.SelectCommand = com
            DA.Fill(ds, "reg")
            Me.DataGridView1.DataSource = ds.Tables(0)
            conn.Close()
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        Finally
        End Try
    End Sub

Posted 18-Nov-10 3:00am

edriso

Updated 18-Nov-10 3:02am

JF2015

v2

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Geoff Williams · Accepted Answer · 2010-11-18T06:25:00

The line

com.CommandText = "select * from reg where [date] BETWEEN  & dd1 &  And  & dd2"

is wrong. It should be

com.CommandText = "select * from reg where [date] BETWEEN #" & dd1.ToString("mm/dd/yyyy") & "# And #" & dd2.ToString("mm/dd/yyyy") & "#"

Dates need to be delimited with the '#' character in queries.

Even better would be to use a parameterised query

com.CommandText = "select * from reg where [date] BETWEEN ? And ?"
com.Parameters.AddWithValue("@StartDate", dd1)
com.Parameters.AddWithValue("@EndDate", dd2)

which would save all the fiddling about with getting the dates into the correct format in the query.

Sunasara Imdadhusen · Accepted Answer · 2010-11-18T03:17:00

Hi
I have added on line
com.Connection = conn

VB

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
            Dim connstrg As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=M:\REGISTER.mdb;Persist Security Info=True;Jet OLEDB:Database Password=he123;"
            Dim conn As New OleDbConnection(connstrg)
            Dim DA As New OleDbDataAdapter("select* FROM reg", conn)
            Dim ds As New DataSet
            Dim com As New OleDbCommand
            Dim dd1 As Date = Me.DateTimePicker1.Value.Date

            Dim dd2 As Date = Me.DateTimePicker2.Value.Date
            conn.Open()
            com.CommandType = CommandType.Text
            com.CommandText = "select * from reg where [date] BETWEEN  & dd1 &  And  & dd2"
            --------------------------------------------------
            --Imdad was added
            com.Connection = conn
            --end 
            --------------------------------------------------
            DA.SelectCommand = com
            DA.Fill(ds, "reg")
            Me.DataGridView1.DataSource = ds.Tables(0)
            conn.Close()
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        Finally
        End Try
    End Sub

Please do let me know, if you have any doubt.

Please provide "Vote":thumbsup: if this would be helpful, and make "Accept Answer" if this would be correct answer.:rose:

Thanks,
Imdadhusen

search between dates

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