MediaElement doesn't play after resuming app

Question

Here is my xaml code:

<MediaElement x:Name="beepSound" Source="/Sounds/beep.mp3" AutoPlay="False" Visibility="Collapsed"/>

C# code:

private void ButtonClick(object sender, RoutedEventArgs e)
{
    if (beepSound.CurrentState == System.Windows.Media.MediaElementState.Playing)
        beepSound.Pause();
    else
        beepSound.Play();
}

This code works perfectly. But after I resume the app (by pressing start button and then back again into the app) the sound doesn't play. What causes this behavior? Is there anything wrong with my code?

Answer 1

After a bit of research I found out that, after the app resumes it loses its source information. So you have to set the source again. Here is how I did it.

protected override void OnNavigatedTo(NavigationEventArgs e)
{
    beepSound.Source = new Uri("/Sounds/beep.mp3", UriKind.Relative);
}

Answer 2

There is nothing wrong in your code

Its just that, Media Element stops working in the background. CurrentState of the media elements gives a "Closed" when we get back to the app after pressing the start button.

You need to use a player that plays the sound even when the app goes in the background(start key press/lock key press). And BackgroundAudioPlayer follows over your requirement.

I am not very much aware with how it works but I can suggest you with some links at this point of time.

Please have a look at the BackgroundAudiolayer and also its namespace.

And a Sample

Enjoy!