Question

I have a C# custom WPF control. I have properties on the control that are based on DependencyProperty’s.

public static readonly DependencyProperty CurrentStateProperty = 
 DependencyProperty.Register( "CurrentState", typeof(ControlStateEnum),
 typeof(MyCustomControl), new PropertyMetadata(ControlStateEnum.Started));

public ControlStateEnum CurrentState
{
    get { return (ControlStateEnum) GetValue(CurrentStateProperty); }
    set { SetValue(CurrentStateProperty, value); }
}

Now, if I use the control, and try to use it, ala:

<myControls:MyCustomControl CurrentState="Loaded" />

The CurrentState never gets set to “Loaded” and remains “Started”. I want to make it capable of binding, but also capable of being set without binding… Is there something I don’t understand or am missing?

When I set a breakpoint on the setter, it doesn’t update on the window load.

Answer 1

So, in the end the value was being set on the control from the XAML after the control had been initialized and loaded. So the way to handle it was to add a PropertyChangedHandler on the DependencyProperty.

parapura had a link to the right answer (http://stackoverflow.com/questions/4225373/setters-not-run-on-dependency-properties).