I'd like to turn of the context menu when the editor is not in edit mode.  Any ideas what's wrong.  Also, does anyone have any experience with templating XamDataGrid?  I didn't have any luck with the ControlHostEditor.

<igDP:Field Name="PartNumber" Label="Part">
 <igDP:Field.Settings>
  <igDP:FieldSettings>
   <igDP:FieldSettings.EditorStyle>
    <Style TargetType="igEditors:XamTextEditor">
     <Setter Property="ContextMenu">
      <Setter.Value>
       <ContextMenu ItemsSource="{Binding DataItem.PartNumbers}">
        <ContextMenu.ItemContainerStyle>
         <Style TargetType="MenuItem">
          <EventSetter Event="Click" Handler="menPartNumber_Click"/>
         </Style>
        </ContextMenu.ItemContainerStyle>
        <ContextMenu.Style>
         <Style TargetType="ContextMenu" BasedOn="{StaticResource {x:Type ContextMenu}}">
          <Style.Triggers>
           <DataTrigger Binding="{Binding IsInEditMode, RelativeSource={RelativeSource AncestorType={x:Type igEditors:XamTextEditor}}}" Value="False">
            <Setter Property="Visibility" Value="Hidden"/>
           </DataTrigger>
          </Style.Triggers>
         </Style>
        </ContextMenu.Style>
       </ContextMenu>
      </Setter.Value>
     </Setter>
    </Style>
   </igDP:FieldSettings.EditorStyle>
  </igDP:FieldSettings>
 </igDP:Field.Settings>
</igDP:Field>