For the click on the top left most box, you cannot really implement it as it is part of the Column Manager Row. You could simulate this behavior by putting a push button of exactly the same size at exactly the same place.
Here is a code snippet of a “Select All” function:
private void button_Click( object sender, EventArgs e )
foreach( Xceed.Grid.DataRow row in gridControl1.DataRows )
gridControl1.SelectedRows.Add( row );
Imported from legacy forums. Posted by CharlesB (had 351 views)