How do I use WPF bindings with RelativeSource?

If you want to bind to another property on the object:

{Binding Path=PathToProperty, Relativesource={Relativesource Self}} 

If you want to get a property on an ancestor:

{Binding Path=PathToProperty, Relativesource={Relativesource AncestorType={x:Type typeOfAncestor}}} 

If you want to get a property on the templated parent (so you can do 2 way bindings in a ControlTemplatE)

{Binding Path=PathToProperty, Relativesource={Relativesource TemplatedParent}} 

or,shorter (this only works for OneWay bindings):

{TemplateBinding Path=PathToProperty} 

Binding Relativesource={ 
    Relativesource @H_969_153@mode=FindAncestor, AncestorType={x:Type ItemType} 
} 
... 

The default attribute of Relativesource is the @H_945_26@mode property. A complete set of valid values is given here (from MSDN):

• PrevIoUsData Allows you to bind the prevIoUs data item (not that control that contains the data item) in the list of data items being displayed.

• TemplatedParent Refers to the element to which the template (in which the data-bound element exists) is applied. This is SIMILAR TO setTing a TemplateBindingExtension and is only applicable if the Binding is within a template.

• Self Refers to the element on which you are setTing the binding and allows you to bind one property of that element to another property on the same element.

• FindAncestor Refers to the ancestor in the parent chain of the data-bound element. You can use this to bind to an ancestor of a specific type or its subclasses. This is the mode you use if you want to specify AncestorType and/or AncestorLevel.

Here is the cheat-sheet that does Help not being confused: http://www.nbdtech.com/Free/WpfBinding.pdf

-aj

Don't forget TemplatedParent:

<Binding Relativesource=@H_323_801@"{Relativesource TemplatedParent}"/> 

or

{Binding Relativesource={Relativesource TemplatedParent}} 

It's worthy of note that for those stuR_855_11845@bling across this thinking of Silverlight:

Silverlight offers a reduced subset only,of these commands

I just posted another solution for accessing the DataContext of a parent element in Silverlight that works for me. It uses Binding ElementName.

Here's a more visual explanation in the context of a MVVM architecture:

(http://www.rootsilver.com/2009/05/wpf-relativesource-ancestor-datacontext)