Manually fire button click event in DataGridView

Question

I've got a DataGridView including a DataGridViewButtonColumn. The user should be able to use the button directly so I set EditMode to EditOnEnter. But, the first click didn't fire the Click event - It seems like the first click selects/focus the row/column?

So I tried to use the CellClick Event:

Private Sub dgv_CellClick(sender As Object, e As DataGridViewCellEventArgs) Handles dgv.CellClick

 Dim validClick = (e.RowIndex <> -1 And e.ColumnIndex <> -1)
 If (TypeOf dgv.Columns(e.ColumnIndex) Is DataGridViewButtonColumn And validClick) Then
     dgv.BeginEdit(True)
     CType(dgv.EditingControl, Button).PerformClick()
 End If

End Sub

But this solution didn't work either. EditingControl always throws a NullReferenceException.

Any ideas?

Answer 1

I do not think there is a specific event available to handle when a DataGridViewButtonColumn cell is clicked. The DataGridView’s Cell_Clicked and CellContentClicked events get fired.

I was not able to get the delay of clicking into the DataGridView once then having to click again to fire the button. When I clicked on the DataGridView button cell, the Cell_Clicked event was immediately fired. Changing the DataGridView’s EditMode made no difference. The code below simply identifies WHICH cell was clicked from the Cell_Clicked event. If the cell clicked was a button column (1 or 2), then I call a created method ButtonHandler to handle which button was pressed and to continue on to the correct button method. Hope this helps.

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e) {
  if (e.ColumnIndex == 1 || e.ColumnIndex == 2) {
    // one of the button columns was clicked 
    ButtonHandler(sender, e);
  }
}

private void ButtonHandler(object sender, DataGridViewCellEventArgs e) {
  if (e.ColumnIndex == 1) {
    MessageBox.Show("Column 1 button clicked at row: " + e.RowIndex + " Col: " + e.ColumnIndex + " clicked");
    // call method to handle column 1 button clicked
    // MethodToHandleCol1ButtonClicked(e.RowIndex);
  }
  else {
    MessageBox.Show("Column 2 button clicked at row: " + e.RowIndex + " Col: " + e.ColumnIndex + " clicked");
    // call method to handle column 2 button clicked
    // MethodToHandleCol2ButtonClicked(e.RowIndex);
  }
}