Question

I have a TreeView setup so that each TreeViewItem has right-click context menu applied as a Style. Something like:

<Grid.Resources>
    <ContextMenu x:Key="contextMenu">
         <MenuItem Header="Save"  IsEnabled="{Binding Path=Saveable}"/>
         <MenuItem Header="Copy" IsEnabled="{Binding Path=Copyable}"/>
         <MenuItem Header="Remove" IsEnabled="{Binding Path=Removeable}"/>
    </ContextMenu>
    <Style TargetType="TreeViewItem">
        <Setter Property="ContextMenu" Value="{StaticResource contextMenu}" />
    </Style>
</Grid.Resources>

Saveable, Copyable and Removeable are properties that come from the object that’s used as the TreeViewItem.

What I’m looking for is when the user clicks on a MenuItem, it would click on the appropriate method of the selected object. So clicking on the “Save” MenuItem would call object.Save(), “Copy” calls object.Copy(), etc. But I’m not sure what the syntax would look like, or whether the idea is actually acceptable in terms of typical WPF style. I know I can just create a new event handler in the encompassing window, but I’d prefer the selected item itself to handle the event.

Thoughts?

Thanks!

Answer 1

Unfortunately, I don’t think that there is an automated way of doing this. The closest option would be to setup a RoutedUICommand for each item in the ContextMenu, and then create a CommandBinding for each in your class. If you want those to go to the TreeViewItem, you’ll probably need to subclass TreeViewItem and set up the CommandBindings there.

The one option that I thought might work would be to add an EventSetter for MenuItem.Click to the TreeViewItem style. However, that did not work – probably because the items in the ContextMenu are in a different visual tree from the TreeViewItems.