InvalidateRequerySuggested on GUI Thread

I've been having issues where buttons weren't getting enabled on my WPF application, only by clicking the form would they work.

I found that I need to force the refresh using CommandManager.InvalidateRequerySuggested but that didn't work, the reason being I wasn't on the GUI Thread, I was on another thread, so here is my little helper class to do it.

public static void RaiseInvalidateRequerySuggested()

{

     Dispatcher dispatcher = null;

 

     if (Application.Current != null)

      {

         dispatcher = Application.Current.Dispatcher;

       }

 

      if (dispatcher != null && !dispatcher.CheckAccess())

       {

        dispatcher.BeginInvoke(DispatcherPriority.Normal,(Action)CommandManager.InvalidateRequerySuggested);

        }

}

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