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I'm currently working with a datagridview on a windows application. I have two specific columns which will work alongside each other. For simplicity, column 1 is used to select a license number, column 2 is used to select a licensed name (both of these columns are combo-box columns). When the end-user selects a name, I'm loading the license number combo-box with a data-set according to the ID of the person selected, for that particular row. This will load any license number(s) assigned to that specific person. While testing my code, the data-set loads correctly according to the person selected. Issue: The datagridview wants to load every row in column 1 with that specific data-set. I would like to have this data-set load column 1 only for the specific row number which the end-user is currently working with.

My code I'm currently testing with:
Private Sub grdvwDeposit_CellValueChanged(ByVal sender As Object, _
      ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) _
      Handles grdvwDeposit.CellValueChanged

    If IsComboBoxCell(e) Then
      If e.ColumnIndex = 2 Then
          Call SetLicenseComboBoxes(e)
      End If
    End If

End Sub

Private Sub SetLicenseComboBoxes(ByVal e As DataGridViewCellEventArgs)

    Dim intVal As Integer
    Dim objWork As Object = Nothing

    Dim cur_cell As DataGridViewCell = Me.grdvwDeposit.CurrentCell
    Dim row As Integer = cur_cell.RowIndex
    Dim col As Integer = cur_cell.ColumnIndex

        If Me.grdvwDeposit.CurrentCell.ColumnIndex = 2 Then
            objWork = Me.grdvwDeposit.Rows(row).Cells(col).Value
            If IsNumeric(objWork) Then
                intVal = CInt(objWork)
                Exit Sub
            End If
            Dim intRow As Integer = row
            Do Until intRow = row - 1
                Call FillDataSet(mdsLicenseSpecific,
                        "@ID_Person", intVal)
                    Call FillMassTransactionGridViewComboBoxFromDataset
                Catch ex As Exception
                          MessageBox.Show(ex.ToString, gstrAppName,
                          MessageBoxButtons.OK, MessageBoxIcon.Information)
                End Try
             intRow -= 1
            Exit Sub
        End If

End Sub

In my 'Do-Until' code, you can see that I'm loading a specific row and column, according to the current row being used. Any suggestions would be greatly appreciated.


Updated 9-May-12 8:08am
Maciej Los 9-May-12 3:50am    
On which event for DataGridView you call SetLicenseComboBoxes(ByVal e As DataGridViewCellEventArgs) procedure?
Maciej Los 9-May-12 13:10pm    
Always, use "Improve question" button to upgrade your question.

1 solution

In my opinion Do...Loop loop in your code is unneccessary.

On my form i've placed DataGridView1 with columns:
Price - DataGridViewTextBoxColumn
TotalPrice - DataGridViewTextBoxColumn
DataGridView1 allow to edit cells.

Below code shows how to update TotalPrice in a specific row:
Private Sub DataGridView1_CellValueChanged(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
    'cell in a first column was updated?
    If e.ColumnIndex = 0 Then UpdateTotalPrice(e.RowIndex)
End Sub

Sub UpdateTotalPrice(ByVal iRow As Integer)
    'if no data ;)
    If iRow = -1 Then Exit Sub
    Dim price As Double = Me.DataGridView1.Rows(iRow).Cells("Price").Value
    Me.DataGridView1.Rows(iRow).Cells("TotalPrice").Value = price * 1.22 '+ 22%
End Sub
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