CODEWITHSUNDEEP
c#xamluwpwin-universal-app
Vijay Nirmal
Vijay Nirmal

Reputation: 5837

How to seek MediaPlayerElement through C#

I am creating a CustomMediaTransportControls for MediaPlayerElement. In it, I have added a new button to Create a window with the currently playing video in CompactOverlay Mode. I have done it using below code.

//Button click event for CompactOverlayButton to Create a Frame in CompactOverlay mode
public async void CompactOverlayButton_ClickAsync(object sender, RoutedEventArgs e)
{
    int compactViewId = ApplicationView.GetForCurrentView().Id;      //Initializing compactViewId to the Current View ID
    await CoreApplication.CreateNewView().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        var frame = new Frame();
        compactViewId = ApplicationView.GetForCurrentView().Id;
        frame.Navigate(typeof(VideoPlayerPage));
        Window.Current.Content = frame;
        Window.Current.Activate();
        ApplicationView.GetForCurrentView().Title = "";
    });
    bool viewShown = await ApplicationViewSwitcher.TryShowAsViewModeAsync(compactViewId, ApplicationViewMode.CompactOverlay);
    compactOverlayButton.Visibility = Visibility.Collapsed;
}

But one problem is I want to resume the video from the point where the user clicks CompactOverlay button. How can I do it?

Upvotes: 0

Views: 683

Answers (1)

Jay Zuo
Jay Zuo

Reputation: 15758

I think one possible solution for your problem is using Navigate(TypeName, Object) method to pass the current playback position to your VideoPlayerPage and in VideoPlayerPage code-behind file, override the OnNavigatedTo method to resume the video from current playback position.

For example, let's assume there are two MediaPlayerElement named "mediaPlayerElement" in current page and VideoPlayerPage. In current page, we can pass the current playback position to pass the current playback position like the following:

//Get current playback position
var position = mediaPlayerElement.MediaPlayer.PlaybackSession.Position;

int compactViewId = 0;
await CoreApplication.CreateNewView().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
    var frame = new Frame();
    compactViewId = ApplicationView.GetForCurrentView().Id;
    frame.Navigate(typeof(VideoPlayerPage), position);
    Window.Current.Content = frame;
    Window.Current.Activate();
    ApplicationView.GetForCurrentView().Title = "";
});
bool viewShown = await ApplicationViewSwitcher.TryShowAsViewModeAsync(compactViewId, ApplicationViewMode.CompactOverlay);

However, CompactOverlayButton_ClickAsync is a function in CustomMediaTransportControls which is a derived class from MediaTransportControls. Form here we can't get the mediaPlayerElement. So we need do some modifications here.

When adding a custom command button in custom transport controls, we usually will use a public EventHandler to perform the action that occurs when the button is clicked. For more info, please see Adding a custom button in Create custom transport controls.

In this case, we can add a EventHandler like:

public event EventHandler<EventArgs> CompactOverlaid;
...
//Button click event for CompactOverlayButton to Create a Frame in CompactOverlay mode
public void CompactOverlayButton_Click(object sender, RoutedEventArgs e)
{               
    CompactOverlaid?.Invoke(this, EventArgs.Empty);
    compactOverlayButton.Visibility = Visibility.Collapsed;
}

And in current page, use the CustomMediaTransportControls like:

<local:CustomMediaTransportControls x:Name="CustomMediaControl"  CompactOverlaid="CustomMediaControl_CompactOverlaid"/>


private async void CustomMediaControl_CompactOverlaid(object sender, EventArgs e)
{
    //Get current playback position
    var position = mediaPlayerElement.MediaPlayer.PlaybackSession.Position;

    int compactViewId = 0;
    await CoreApplication.CreateNewView().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        var frame = new Frame();
        compactViewId = ApplicationView.GetForCurrentView().Id;
        frame.Navigate(typeof(VideoPlayerPage), position);
        Window.Current.Content = frame;
        Window.Current.Activate();
        ApplicationView.GetForCurrentView().Title = "";
    });
    bool viewShown = await ApplicationViewSwitcher.TryShowAsViewModeAsync(compactViewId, ApplicationViewMode.CompactOverlay);
}

And then in VideoPlayerPage code-behind file, override the OnNavigatedTo method like the following:

protected override void OnNavigatedTo(NavigationEventArgs e)
{
    /// set media source
    ...
    /// set media source

    if (e.Parameter is TimeSpan position)
    {
        mediaPlayerElement.MediaPlayer.PlaybackSession.Position = position;
    }

    mediaPlayerElement.MediaPlayer.Play();
}

After this, the video should be able to play from the position where the user clicks CompactOverlayButton.

Upvotes: 1

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