Binding an Ancestor not working WPF

Question

I\'ve got a TreeView, which is modified to show Images in front of the text too. So my modified TreeViewItem is called ImagedTreeViewItem. This ImagedTreeViewItem has a Prop

Answer 1

ContextMenu is not part of the VisualTree, that's why the binding fails. You have to use some kind of relay: ContextMenu.PlacementTarget and Tag property as a cache for the second trail of binding search. I think this will work:

<StackPanel Orientation="Horizontal"
            Tag="{Binding RelativeSource={RelativeSource AncestorType={x:Type myClasses:ImagedTreeViewItem}}}">
    <StackPanel.ContextMenu>
        <ContextMenu>
            <MenuItem Command="my:ImagedTreeView.AddFolder" Header="Add Folder"
                      IsEnabled="{Binding Path=PlacementTarget.Tag.IsFolder, RelativeSource={RelativeSource AncestorType=ContextMenu}}">
                <MenuItem.Icon>
                    <Image Source="folderadd16.png" />
                </MenuItem.Icon>
            </MenuItem>
            <!-- ... -->
        </ContextMenu>
    </StackPanel.ContextMenu>