Question

I am looking at a source code presented on Microsoft website where a class is derived from the Adorner class and using override a new style been added to a TextBox in XAML. The code is not complete so I’m having problem on how to assign this code to the control (TextBox) on XAML.

Can an expert give me some ideas how to associated the TextBox with the inherited class?

http://msdn.microsoft.com/en-us/library/ms743737.aspx#Y1457

Regards,
Amit

Answer 1

I would claim that MSDN is clear enough:

To bind an adorner to a particular UIElement, follow these steps:

1. Call the static method GetAdornerLayer to get an AdornerLayer object for the UIElement to be adorned. GetAdornerLayer walks up the visual tree, starting at the specified UIElement, and returns the first adorner layer it finds. (If no adorner layers are found, the method returns null.)

2. Call the Add method to bind the adorner to the target UIElement.

You may not be able to do this in XAML unless you can get the methods invoked by the parser, e.g. via the IList interface. Of course you can expand XAML almost arbitrarily with markup extensions that do the necessary imperative steps for you.