PlayToSource.Next Property

Reference

Definition

Namespace:: Windows.Media.PlayTo

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Edit

Gets or sets the next Play To source element.

public:
 property PlayToSource ^ Next { PlayToSource ^ get(); void set(PlayToSource ^ value); };

/// [get: Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, Windows.Foundation.UniversalApiContract)]
/// [set: Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, Windows.Foundation.UniversalApiContract)]
PlayToSource Next();

void Next(PlayToSource value);

/// [get: Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, "Windows.Foundation.UniversalApiContract")]
/// [set: Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, "Windows.Foundation.UniversalApiContract")]
PlayToSource Next();

void Next(PlayToSource value);

public PlayToSource Next { [Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, typeof(Windows.Foundation.UniversalApiContract))] get; [Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, typeof(Windows.Foundation.UniversalApiContract))] set; }

public PlayToSource Next { [Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, "Windows.Foundation.UniversalApiContract")] get; [Windows.Foundation.Metadata.Deprecated("PlayToSource may be altered or unavailable for releases after Windows 10. Instead, use CastingSource.", Windows.Foundation.Metadata.DeprecationType.Deprecate, 65536, "Windows.Foundation.UniversalApiContract")] set; }

var playToSource = playToSource.next;
playToSource.next = playToSource;

Public Property Next As PlayToSource

Property Value

PlayToSource

The next Play To source element.

Attributes: DeprecatedAttribute

Examples

// Set up the Play To contract.

// Used to pass an image to Play To that will not be removed/destroyed
// by the slide show logic. For example, if the user opens the Devices
// charm and the sourcerequested event fires, but the image display timeout
// completes before the user selects a target device, then the image that
// was being displayed is removed and destroyed. initialImage is never 
// destroyed so Play To will always have a valid source to stream.
Image initialImage = null;

private async void SourceRequested(Windows.Media.PlayTo.PlayToManager sender, 
                             Windows.Media.PlayTo.PlayToSourceRequestedEventArgs e)
{
    var deferral = e.SourceRequest.GetDeferral();

    await dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
    () =>
    {
        initialImage = new Image();

        // Use the statechanged event of the image passed to Play To to determine when
        // the image is finally connected to the Play To Receiver.
        initialImage.PlayToSource.Connection.StateChanged += InitialImageConnectionStateChanged;

        // Provide Play To with the first image to stream.
        e.SourceRequest.SetSource(initialImage.PlayToSource);

        deferral.Complete();
    });
}

private async void InitialImageConnectionStateChanged(Windows.Media.PlayTo.PlayToConnection sender,
                                                      Windows.Media.PlayTo.PlayToConnectionStateChangedEventArgs e)
{
        if (e.CurrentState == Windows.Media.PlayTo.PlayToConnectionState.Connected) {

            await dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, 
                async () =>
                {
                    // Clear any existing timeout.
                    if (timer != null) { timer.Stop(); }

                    // Clear the slide show panel.
                    SlideShowPanel.Children.Clear();

                    // Set the slide show objects and values to show that we are streaming.
                    streaming = true;
                    DisconnectButton.Visibility = Visibility.Visible;
                    InstructionsBlock.Visibility = Visibility.Collapsed;

                    // Queue and display the next image.
                    var image = await QueueImage(currentImage, true);
                    initialImage.PlayToSource.Next = image.PlayToSource;
                    initialImage.PlayToSource.PlayNext();
                });
        };
}

// Update the once the user has selected a device to stream to.

private async void SourceSelected(Windows.Media.PlayTo.PlayToManager sender, 
                            Windows.Media.PlayTo.PlayToSourceSelectedEventArgs e)
{
    await dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
        () =>
        {
            DisconnectButton.Click += DisconnectButtonClick;
            MessageBlock.Text = "Streaming to " + e.FriendlyName + "...";
            DeviceBlock.Text = e.FriendlyName + ".\nClick here to disconnect.";
            var imageBitmap = new Windows.UI.Xaml.Media.Imaging.BitmapImage();
            imageBitmap.SetSource(e.Icon);
            IconImage.Source = imageBitmap;
        });
}

private void DisconnectButtonClick(object sender, RoutedEventArgs e)
{
    Windows.Media.PlayTo.PlayToManager.ShowPlayToUI();
}

' Set up the Play To contract.

' Used to pass an image to Play To that will not be removed/destroyed
' by the slide show logic. For example, if the user opens the Devices
' charm and the sourcerequested event fires, but the image display timeout
' completes before the user selects a target device, then the image that
' was being displayed is removed and destroyed. initialImage is never 
' destroyed so Play To will always have a valid source to stream.
Private initialImage As Image = Nothing

Private Async Sub SourceRequested(sender As Windows.Media.PlayTo.PlayToManager,
                             e As Windows.Media.PlayTo.PlayToSourceRequestedEventArgs)

    Dim deferral = e.SourceRequest.GetDeferral()

    Await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
    Sub()
        initialImage = New Image()

        ' Use the statechanged event of the image passed to Play To to determine when
        ' the image is finally connected to the Play To Receiver.
        AddHandler initialImage.PlayToSource.Connection.StateChanged, AddressOf InitialImageConnectionStateChanged

        ' Provide Play To with the first image to stream.
        e.SourceRequest.SetSource(initialImage.PlayToSource)

        deferral.Complete()
    End Sub)
End Sub

Private Async Sub InitialImageConnectionStateChanged(sender As Windows.Media.PlayTo.PlayToConnection,
                                                         e As Windows.Media.PlayTo.PlayToConnectionStateChangedEventArgs)

    If e.CurrentState = Windows.Media.PlayTo.PlayToConnectionState.Connected Then

        Await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
            Async Sub()
                ' Clear any existing timeout.
                If timer IsNot Nothing Then timer.Stop()

                ' Clear the slide show panel.
                SlideShowPanel.Children.Clear()

                ' Set the slide show objects and values to show that we are streaming.
                streaming = True
                DisconnectButton.Visibility = Visibility.Visible
                InstructionsBlock.Visibility = Visibility.Collapsed

                ' Queue and display the next image.
                Dim image = Await QueueImage(currentImage, True)
                initialImage.PlayToSource.Next = image.PlayToSource
                initialImage.PlayToSource.PlayNext()
            End Sub)
    End If
End Sub

' Update the once the user has selected a device to stream to.

Private Async Sub SourceSelected(sender As Windows.Media.PlayTo.PlayToManager,
                                 e As Windows.Media.PlayTo.PlayToSourceSelectedEventArgs)

    Await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
        Sub()
            AddHandler DisconnectButton.Click, AddressOf DisconnectButtonClick
            MessageBlock.Text = "Streaming to " & e.FriendlyName & "..."
            DeviceBlock.Text = e.FriendlyName & "." & vbCr & "Click here to disconnect."
            Dim imageBitmap = New Windows.UI.Xaml.Media.Imaging.BitmapImage()
            imageBitmap.SetSource(e.Icon)
            IconImage.Source = imageBitmap
        End Sub)
End Sub

Private Sub DisconnectButtonClick()
    Windows.Media.PlayTo.PlayToManager.ShowPlayToUI()
End Sub

Remarks

For an example of using the Next property, see Media casting.

Applies to

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PlayToSource.Next Property

Definition

Property Value

Examples

Remarks

Applies to

See also

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