Question

Visibility="{Binding Path=Visibility, ElementName=btnUndo}"/>

I am trying to bind a menuitems visibility to another controls visibility (btnUndo).

That controls visibility is bound to a trigger

        <Style x:Key="undoStyle">
            <Style.Triggers>
                <DataTrigger Binding="{Binding SelectedItem.isEdited, ElementName=lvBatches}" Value="True">
                    <Setter Property="FrameworkElement.Visibility" Value="Visible"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding SelectedItem.isEdited, ElementName=lvBatches}" Value="False">
                    <Setter Property="FrameworkElement.Visibility" Value="Collapsed"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>

I tried binding the MenuItem to the same trigger, but that didn’t work either.

Any suggestions?

Answer 1

ContextMenus exist in the Adorner Layer, which is not the same Visual Tree as the UI layer.

I know you can bind something like the following in a MenuItem, which will return the Control the ContextMenu is attached to, and from there you might be able to find the data you’re looking for.

{Binding Path=PlacementTarget, RelativeSource=
     {RelativeSource FindAncestor, AncestorType={x:Type ContextMenu}}}

For example, you could create a Converter which traverses up the VisualTree from the specified control until it finds the object it’s looking for, or you could bind to the DataContext and look for a specific value within your ViewModel.