The following example demonstrates how to add an item (Button with a TextBlock as its template) to the drop-down auto-filter control of the ShipCountry's associated column-manager cell. The button will handle the ClearAutoFilterValues command to clear any auto-filter values currently applied to the column. A ListBox or Selector-base control identified as the PART_DistinctValuesHost template part must be specified when redefining the auto-filter control's template.

"<GRID><CRLF>  <GRID.RESOURCES><CRLF>    <?xml:namespace prefix = xcdg /><xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                       Source="{Binding Source={x:Static Application.Current}