Silverlight 4 Nested Navigation Frame Communication

Hey everyone, this one is really stumping us and we can't find anyone els开发者_如何学Pythone having the same issue.

We have a Silverlight business application, with nested Navigation Frames. Within the nested frame we have some User Controls which we want to use to make the outer Navigation Frame navigate to a new page.

How do get access up to the outermost Navigation Frame, from the lowest level user controls?

Thanks for any help you can give.

Martyn.

We eventually came across the Prism framework and have utilised the DelegateCommand functionaltiy to achieve our goal.