Binding to Self/'this' in XAML

Question

Simple WPF/XAML question. In XAML, how do I reference the Self/this object in a given context? In a very basic app with a main window, one control, and a coded C# property of the window, I want to bind a property of the control to the hand coded property of the window.

In code, this is very easy - in the Window's constructor, I added this:

Binding bind = new Binding(); bind.Source = this; bind.Path = new PropertyPath("ButtonWidth"); button1.SetBinding(WidthProperty, bind); 

Obviously, I have a property called ButtonWidth, and a control called button1. I can't figure out how to do this in XAML. Various attempts like the following example have not worked:

<Button x:Name="button1" Width="{Binding Source=Self Path=ButtonWidth}"/>  <Button x:Name="button1" Width="{Binding RelativeSource={RelativeSource Self} Path=ButtonWidth}"/>  

etc

Thanks

Answer 1

First use a comma between the RelativeSource and Path in your Binding:

<Button x:Name="button1" Width="{Binding RelativeSource={RelativeSource Self},                                  Path=ButtonWidth}"/>  

Secondly, the RelativeSource binds to the Button. Button has no property called ButtonWidth. I am guessing you need to Bind to your parent control.

So try this RelativeSource binding:

<Button x:Name="button1" Width="{Binding RelativeSource=     {RelativeSource FindAncestor, AncestorType={x:Type YourNamespace:YourParentControl}},      Path=ButtonWidth}"/>  

Answer 2

I think what you are looking for is this:

<Window x:Class = "blah blah all the regular stuff"  DataContext="{Binding RelativeSource={RelativeSource Self}}"  >