I want when I click popup not closed

[mohammad]

When I collapse or expanad popup is closed
I want when I click popup not closed

want the icon "+" clicked popup not closed
I'd click anywhere to close popup

[Stefan]

Hello Mohammad,

Do prevent the drop down from closing when the expander is clicked, you should use the DropDownClosing event as follows:

void radMultiColumnComboBox1_DropDownClosing(object sender, RadPopupClosingEventArgs args)
{
    RadElement elementUnderMouse = this.radMultiColumnComboBox1.EditorControl.ElementTree.GetElementAtPoint(
        this.radMultiColumnComboBox1.EditorControl.TableElement.PointFromScreen(MousePosition));
    if (elementUnderMouse != null)
    {
        Console.WriteLine(elementUnderMouse);
        if (args.CloseReason == RadPopupCloseReason.Mouse && elementUnderMouse is GridExpanderItem)
        {
            args.Cancel = true;
        }
    }
}

I hope this helps.
 
Kind regards,
Stefan
the Telerik team