How does a XAML definition turn into an instance of an object?

Question

XAML allows you to specify an attribute value using a string containing curly braces. Here is an example that creates an instance of Binding and assigns it the Text property of a TextBox.

<TextBox Text="{Binding ElementName=Foo, Path=Bar}"/> 

I want to extend XAML so that the developer can introduce it as valid ...

 <TextBox Text="{MyCustomObject Field1=Foo, Field2=Bar}"/> 

This will instantiate my class and set the properties of Field1 / Field2 accordingly. Is it possible? If so, how do you do it?

If possible, I have the following question. Can I take the line "{Binding ElementName = Foo, Path = Bar}" and ask the framework to process it and return the Binding instance that it specified? This should be done somewhere already in order to get the aforementioned XAML to work, and therefore there should be a way to ask the same thing to be handled.

Answer 1

take a look at markupextensions http://blogs.msdn.com/wpfsdk/archive/2007/03/22/blogpost-text-creatingasimplecustommarkupextension.aspx

Answer 2

The Binding class is a markup extension . You can write your own, inheriting from System.Windows.Markup.MarkupExtension .

ElementName and Path are just properties of the Binding object.

As for the continuation, you can create a new Binding in the code by creating an instance of the Binding object. I do not know how to process the string.