bindProxy.md

cannot-find-source-for-binding-with-reference-relativesource-findancestor

http://stackoverflow.com/questions/15494226/cannot-find-source-for-binding-with-reference-relativesource-findancestor ancestor (or any ancestor) so the RelativeSource doesn't work.

Instead you have to give the binding the source explicitly. <UserControl.Resources> <local:BindingProxy x:Key="proxy" Data="{Binding}" /> </UserControl.Resources>

And the binding proxy. public class BindingProxy : Freezable { protected override Freezable CreateInstanceCore() { return new BindingProxy(); }

public object Data
{
    get { return (object)GetValue(DataProperty); }
    set { SetValue(DataProperty, value); }
}

// Using a DependencyProperty as the backing store for Data.
// This enables animation, styling, binding, etc...
public static readonly DependencyProperty DataProperty =
    DependencyProperty.Register("Data", typeof(object), 
    typeof(BindingProxy), new UIPropertyMetadata(null));

}