DataGridView with DataGridViewComboBoxColumn: How to single click for dropdown list?


I have  DGV on a form that is working perfectly well, except I want a single click on the cell to begin editing rather than clicking two times.  For example, I would like a single click on a DataGridViewComboBoxColumn's cell to cause the dropdown list to appear and a single click on a DataGridViewTextBoxColumn to permit the user to start editing the contents.  I have the written the following code, which is attached to the MouseUp event, but I am not certain what I should have it do to the cell to achieve my goals.  I've tried setting focus on mouse up, but to no avail.

Thanks in advance for the help!


        private void dataGridView_MouseUp(object sender, MouseEventArgs e)
            DataGridView.HitTestInfo hti = dataGridView.HitTest(e.X, e.Y);

                if (hti.Type == DataGridViewHitTestType.Cell)
                    //  What to do here????
            catch (Exception ex)
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nickhoggardConnect With a Mentor Commented:

I just wrote a solution for this at work today, but I dont have it here sorry.

The basic idea was to catch the DataGridView.EditControlShowing event, check the control (e.Control) and see if it can be cast to a ComboBox.  If it can then add an event handler for the GotFocus event and in that event handler call ComboBox.DroppedDown  = true

within the EditControlShowing event handler:
if gettype(combobox).IsAssignableFrom(e.Control.GetType) then
    removehandler ctype(e.Control, ComboBox).GotFocus, addressof _GotFocus
    addhandler ctype(e.Control, ComboBox).GotFocus, addressof _GotFocus
end if

private sub _GotFocus(sender as object, e as eventargs)
    ctype(e.control, combobox).DroppedDown = true
end sub

Hope this helps



mjgardneAuthor Commented:
Here is the answer that I've discovered and it works perfectly!  No extra event handling code required to achieve the results that I required...

On form_load set:

dataGridView.EditMode = DataGridViewEditMode.EditOnEnter;
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