[.NET 2.0+] Adding a ComboBox Column to a DataGridView

[kotlet]

Nice work

But i have one problem and dont know how to solve it. I already have appplication with a lot of combos and textboxes on form (32 rows, in each row 5 combos and 5 texboxes and lot of code behind). Problem is that curent app is very slow on form load. With your sample i could make it a lot faster.

Already have gridview filled with some test data.

And the problem is:

When i click on combobox in use this code to display dropdown (to click only once to display dropdown).

Private Sub DataGridView1_CellMouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles DataGridView1.CellMouseClick
        Try
            If e.RowIndex = -1 Then Exit Sub
            Select Case e.ColumnIndex
                Case 0, 2, 4, 6, 8
                    DataGridView1.BeginEdit(True)

                    Dim controll As DataGridViewComboBoxEditingControl = DataGridView1.EditingControl
                    If controll IsNot Nothing Then
                        controll.DroppedDown = True

                    End If

            End Select
        Catch ex As Exception
            MsgBox(ex.Message & "  " & e.RowIndex & "  " & e.ColumnIndex)
        End Try

    End Sub

    Private Sub gwKupuje_DataError(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewDataErrorEventArgs) Handles DataGridView1.DataError
        If e.Context = DataGridViewDataErrorContexts.Formatting _
               Or e.Context = DataGridViewDataErrorContexts.PreferredSize Then
            e.ThrowException = False
        End If
    End Sub

When i click on item in dropdown the cell is filled with selected text. But CellValueChanged event is fired when i go out from cel in clicked on other cell. Now how i set that value is changed when i click on item in dropdown, or to catch this event?

I need this for enable or disable (ready only) next cell in gridview.

An one more thing.

I want to add one column in gridview like row number, starting with 0.