Open MediaElement in FullScreen

There is a MediaElement in my silverLight4 Application that plays videos. There are also other controls in the form (listbox, buttons etc...). When vieweing a Video, i want the option to switch to Fullscreen, but only the video and not all the form (something like y开发者_StackOverflow中文版outube), is there a way to switch just the 'MediaElement' control to fullscreen?

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Make your MediaElement the RootVisual of the app. Since you can't change the RootVisual once it's assigned you need to do something like so

private MainPage _mainPage = new MainPage();
private MediaElement _media = new MediaElement(); 

private void Application_Startup(object sender, StartupEventArgs e)
{
    Grid grid = new Grid();
    grid.Children.Add(_mainPage);
    this.RootVisual = grid;
}

public void FullscreenVideo()
{
    (this.RootVisual as Grid).Children.Clear();
    (this.RootVisual as Grid).Children.Add(_media);
    Application.Current.Host.Content.IsFullScreen = true;
}

If you call FullscreenVideo it should load your MediaElement into a fullscreen window