Question

I didn’t get the result I want from the following code:

    Private Sub tblView_SelectionChanged(ByVal sender As System.oject, ByVal e as System.EventArgs)Handles tblView.SelectionChanged
        Dim st As String = tblView.SelectedRows.ToString
        txtID.Text = st(0)
        Try
           myCommand = New SqlCommand("SELECT * FROM tblRack WHERE RackID = "& txtID.Text &"", myConnection)
           myReader = myCommand.ExecuteReader()
           While myReader.Read
               txtID.Text = myReader(0).ToString
               txtRack.Text = myReader(1).ToString
           End While
           myReader.Close()
        Catch ex As Exception
           MsgBox (ex.Message)
        End Try
 End Sub

I wanted the data I selected on the datagridview row to be display in the textbox, but it displays the error message that st(0) produces “S” which is incompatible to my RackID data type. Any idea?

Answer 1

You are converting the SelectdRows object to a string, which will probably return something like "System.Windows.Forms.DataGridViewSelectedRowCollection". Doing st(0) will take first charachter from this string, which is an ‘S’.

Perhaps you should try this:

    Dim st As String = tblView.SelectedRows[0].Cells[0].Value.ToString
    txtID.Text = st