Windows Phone Play Media Player (Video,Audio) (Local Media, Web URL Media)

Partial Public Class MainPage
    Inherits PhoneApplicationPage

    ' Constructor
    Public Sub New()
        InitializeComponent()
        ' Re-assign names already in the XAML file
        appbarRewindButton = TryCast(Me.ApplicationBar.Buttons(0), ApplicationBarIconButton)
        appbarPlayButton = TryCast(Me.ApplicationBar.Buttons(1), ApplicationBarIconButton)
        appbarPauseButton = TryCast(Me.ApplicationBar.Buttons(2), ApplicationBarIconButton)
        appbarEndButton = TryCast(Me.ApplicationBar.Buttons(3), ApplicationBarIconButton)
    End Sub

    Private Sub OnAppbarRewindClick(sender As Object, e As System.EventArgs)
        mediaElement.Position = TimeSpan.Zero
    End Sub

    Private Sub OnAppbarPlayClick(sender As Object, e As System.EventArgs)
        mediaElement.Play()
    End Sub

    Private Sub OnAppbarPauseClick(sender As Object, e As System.EventArgs)
        mediaElement.Pause()
    End Sub
 
    Private Sub OnAppbarEndClick(sender As Object, e As System.EventArgs)
        mediaElement.Position = mediaElement.NaturalDuration.TimeSpan
    End Sub

    ' MediaElement events
    Private Sub OnMediaElementMediaFailed(sender As Object, args As ExceptionRoutedEventArgs)
        errorText.Text = args.ErrorException.Message
    End Sub

    Private Sub OnMediaElementMediaOpened(sender As Object, args As RoutedEventArgs)
        appbarRewindButton.IsEnabled = True
        appbarEndButton.IsEnabled = True
    End Sub

    Private Sub OnMediaElementCurrentStateChanged(sender As Object, args As RoutedEventArgs)
        statusText.Text = mediaElement.CurrentState.ToString()

        If mediaElement.CurrentState = MediaElementState.Stopped Or mediaElement.CurrentState = MediaElementState.Paused Then
            appbarPlayButton.IsEnabled = True
            appbarPauseButton.IsEnabled = False
        ElseIf mediaElement.CurrentState = MediaElementState.Playing Then
            appbarPlayButton.IsEnabled = False
            appbarPauseButton.IsEnabled = True
        End If
    End Sub

End Class

public partial class MainPage : PhoneApplicationPage
{

	// Constructor
	public MainPage()
	{
		InitializeComponent();
		// Re-assign names already in the XAML file
		appbarRewindButton = this.ApplicationBar.Buttons(0) as ApplicationBarIconButton;
		appbarPlayButton = this.ApplicationBar.Buttons(1) as ApplicationBarIconButton;
		appbarPauseButton = this.ApplicationBar.Buttons(2) as ApplicationBarIconButton;
		appbarEndButton = this.ApplicationBar.Buttons(3) as ApplicationBarIconButton;
	}

	private void OnAppbarRewindClick(object sender, System.EventArgs e)
	{
		mediaElement.Position = TimeSpan.Zero;
	}

	private void OnAppbarPlayClick(object sender, System.EventArgs e)
	{
		mediaElement.Play();
	}

	private void OnAppbarPauseClick(object sender, System.EventArgs e)
	{
		mediaElement.Pause();
	}

	private void OnAppbarEndClick(object sender, System.EventArgs e)
	{
		mediaElement.Position = mediaElement.NaturalDuration.TimeSpan;
	}

	// MediaElement events
	private void OnMediaElementMediaFailed(object sender, ExceptionRoutedEventArgs args)
	{
		errorText.Text = args.ErrorException.Message;
	}

	private void OnMediaElementMediaOpened(object sender, RoutedEventArgs args)
	{
		appbarRewindButton.IsEnabled = true;
		appbarEndButton.IsEnabled = true;
	}

	private void OnMediaElementCurrentStateChanged(object sender, RoutedEventArgs args)
	{
		statusText.Text = mediaElement.CurrentState.ToString();

		if (mediaElement.CurrentState == MediaElementState.Stopped | mediaElement.CurrentState == MediaElementState.Paused) {
			appbarPlayButton.IsEnabled = true;
			appbarPauseButton.IsEnabled = false;
		} else if (mediaElement.CurrentState == MediaElementState.Playing) {
			appbarPlayButton.IsEnabled = false;
			appbarPauseButton.IsEnabled = true;
		}
	}

}