EventHandler In XAML

Hi guys,

I have a problem defining an EventHandler in XAML

Please take a look at the code and you will understand what I am trying to do and how I am trying to assign a method to the attached handler.

This is code of attached property representing the handler ( in this question its called attached handler):

    public static EventHandler<EventArgs> GetResetValue(DependencyObject obj)
    { 
       return (EventHandler<EventArgs>)obj.GetValue(ResetValueProperty);
    }

    public static void SetResetValue(DependencyObject obj, EventHandler<EventArgs> value)
    {
        obj.SetValue(ResetValueProperty, value);
    }

    // Using a DependencyProperty as the backing store for ResetValue.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty ResetValueProperty =
        DependencyProperty.RegisterAttached("ResetValue", typeof(EventHandler<EventArgs>), typeof(Extension), new UIPropertyMetadata(null, OnResetValue));

    private static void OnResetValue(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
    {
        DependencyObject obj = dependencyObject;
        for (; obj != null && !(obj is TextBox); obj = VisualTreeHelper.GetParent(obj)) ;

        TextBoxtbx = obj as TextBox;
        if (tbx != null)
        {
            tbx.TextChanged += (EventHandler<EventArgs>)dependencyPropertyChangedEventArgs.NewValue;
        }
    }

XAML looks like this:

<TextBox><Button><Label ext:Extension.ResetValue=".. here i want to assign the handler, as examle DoSomething" ></Button></TextBox>

The method which i wish to assign to attachedhandler is inside Window.cs looks like this as example:

public void DoSomething(object sender, EventArgs e)
{
  ....
}

As you can seeI am trying to assign method to attached handler ( look above, attached handler is once again attachedproperty of type EventHandler).

OnResetValue method I travel up the VisualTree till i find the TextBox and I add the handler to TextBox.TextChanged event.

When TextChanged then the attached handler method will be called and assigned method will be called. Its like a chain.

How do I do this? I would like to do this with events.