DataProviderRequest DataProviderRequest DataProviderRequest DataProviderRequest Class

Gets the deadline for finishing a delayed rendering operation. If execution goes beyond that deadline, the results of delayed rendering are ignored.

public : DateTime Deadline { get; }public DateTimeOffset Deadline { get; }Public ReadOnly Property Deadline As DateTimeOffset// You can use this property in JavaScript.

Specifies the format id.

public : PlatForm::String FormatId { get; }public string FormatId { get; }Public ReadOnly Property FormatId As string// You can use this property in JavaScript.

Returns a DataProviderDeferral object.

public : DataProviderDeferral GetDeferral()public DataProviderDeferral GetDeferral()Public Function GetDeferral() As DataProviderDeferral// You can use this method in JavaScript.

Examples

async void OnDeferredImageRequestedHandler(DataProviderRequest request)
{
    // Provide updated bitmap data using delayed rendering.
    if (this.imageStream != null)
    {
        DataProviderDeferral deferral = request.GetDeferral();
        InMemoryRandomAccessStream inMemoryStream = new InMemoryRandomAccessStream();

        // Decode the image.
        BitmapDecoder imageDecoder = await BitmapDecoder.CreateAsync(this.imageStream);

        // Re-encode the image at 50% width and height.
        BitmapEncoder imageEncoder = await BitmapEncoder.CreateForTranscodingAsync(inMemoryStream, imageDecoder);
        imageEncoder.BitmapTransform.ScaledWidth = (uint)(imageDecoder.OrientedPixelHeight * 0.5);
        imageEncoder.BitmapTransform.ScaledHeight = (uint)(imageDecoder.OrientedPixelHeight * 0.5);
        await imageEncoder.FlushAsync();

        request.SetData(RandomAccessStreamReference.CreateFromStream(inMemoryStream));
        deferral.Complete();
    }
}

function onDeferredImageRequested(request) {
    try {
        if (imageFile) {
            // This is to make sure deferral works even in synchronous case
            var deferral = request.getDeferral();
            var imageStreamRef = Windows.Storage.Streams.RandomAccessStreamReference.createFromFile(imageFile);
            request.setData(imageStreamRef);
            deferral.complete();
        }
    } catch (exc) {
        // Error handling goes here.
    }
}

Remarks

To learn more, check out How to produce requested data asynchronously.

Sets the content of the DataPackage to be shared with a target app.

public : void SetData(PlatForm::Object value)public void SetData(Object value)Public Function SetData(value As Object) As void// You can use this method in JavaScript.