title: UWP Access MediaPlayerElement from other page
body: <p>In my MainPage.xaml I have </p>
  
  <pre><code>&lt;Grid&gt;
      &lt;NavigationView x:Name="navView"&gt;
          &lt;NavigationView.MenuItems&gt;
              &lt;NavigationViewItem x:Name="music" Content="My Music"/&gt;
          &lt;/NavigationView.MenuItems&gt;
  
          &lt;Frame x:Name="myFrame"&gt;
              &lt;Frame.ContentTransitions&gt;
                  &lt;TransitionCollection&gt;
                      &lt;NavigationThemeTransition/&gt;
                  &lt;/TransitionCollection&gt;
              &lt;/Frame.ContentTransitions&gt;
          &lt;/Frame&gt;
      &lt;/NavigationView&gt;
  
      &lt;Grid Grid.Row="1"&gt;
          &lt;MediaPlayerElement x:Name="nowPlaying"
            AreTransportControlsEnabled="True" x:FieldModifier="public"&gt;
              &lt;MediaPlayerElement.TransportControls&gt;
                  ...
              &lt;/MediaPlayerElement.TransportControls&gt;
          &lt;/MediaPlayerElement&gt;
      &lt;/Grid&gt;
  &lt;/Grid&gt;
  </code></pre>
  
  <p>I want to play music (pass Uri) from other Page (MyMusic) but I can't find a way to access the MediaPlayerElement. The other Page is opened in myFrame. And I want to keep the TransportControls.</p>