Bring element forward (Z Index) in Silverlight/WPF

Question

All the documentation and examples I\'m finding online for setting Z-Index to bring an element forward in Silverlight are using a Canvas element as a container.

My i

Answer 1

I've had to deal with this.

Say you have an ItemsControl with an ItemTemplate set to an instance of a custom control. Within that control you do Canvas.SetZIndex(this, 99). It won't work, because "this" is not the immediate child of the ItemsControl's ItemsPanel. The ItemsControl creates a ContentPresenter for each item, drops that into the ItemsPanel, and renders the ItemTemplate within the ContentPresenter.

So, if you want to change the ZIndex within your control, you have to find its ContentPresenter, and change the ZIndex on that. One way is...

        public static T FindVisualParent( this DependencyObject obj )
        where T : DependencyObject
    {
        DependencyObject parent = VisualTreeHelper.GetParent( obj );
        while ( parent != null )
        {
            T typed = parent as T;
            if ( typed != null )
            {
                return typed;
            }
            parent = VisualTreeHelper.GetParent( parent );
        }
        return null;
    }
                ContentPresenter foo = this.FindVisualParent();
            Canvas.SetZIndex( foo, 99 );