You can try something like this: <Grid><Grid.Resources> <xcdg:DataGridCollectionViewSource x:Key=''cvs_orders''                                    ...

Hi Dave, I should have been more specific. You need to change both the CellContentTemplate and the CellEditor in order to display a checkbox when the cell is being edited and when it is not. The CellEditorBinding markup extension can only be used within the context of a cell editor, it will do nothing when used in the CellContentTemplate. That ...