DataProviderRequest.GetDeferral Método

Definição

Namespace:

Windows.ApplicationModel.DataTransfer

Retorna um objeto DataProviderDeferral .

public:
 virtual DataProviderDeferral ^ GetDeferral() = GetDeferral;

DataProviderDeferral GetDeferral();

public DataProviderDeferral GetDeferral();

function getDeferral()

Public Function GetDeferral () As DataProviderDeferral

Retornos

DataProviderDeferral

Um objeto de adiamento do provedor de dados.

Exemplos

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();
    }
}

Comentários

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