private async void FetchDecodedImage()
{
try
{
Uri uri = MainPage.GenerateImageUri();
ImageRequestBuilder builder = ImageRequestBuilder.NewBuilderWithSource(uri);
if (GrayscaleRadioButton.IsChecked.Value)
{
builder.SetPostprocessor(GrayscalePostprocessor);
}
else if (InvertRadioButton.IsChecked.Value)
{
builder.SetPostprocessor(InvertPostprocessor);
}
ImageRequest request = builder.Build();
WriteableBitmap bitmap = await _imagePipeline.FetchDecodedBitmapImageAsync(request);
var image = new Image();
image.Width = image.Height = MainPage.VIEW_DIMENSION;
image.Source = bitmap;
ImageGrid.Items.Add(image);
}
catch (Exception)
{
// Invalid uri, try again
FetchDecodedImage();
}
}
private async void FetchDecodedImage()
{
try
{
Uri uri = MainPage.GenerateImageUri();
WriteableBitmap bitmap = await _imagePipeline.FetchDecodedBitmapImageAsync(
ImageRequest.FromUri(uri));
UpdateImageGrid(bitmap);
}
catch (Exception)
{
// Invalid uri, try again
FetchDecodedImage();
}
}
public async Task TestClearCaches()
{
var request = _requestBuilder.Build();
await _imagePipeline.FetchDecodedBitmapImageAsync(request).ConfigureAwait(false);
Assert.IsTrue(_imagePipeline.IsInBitmapMemoryCache(request));
Assert.IsTrue(await _imagePipeline.IsInDiskCacheAsync(request).ConfigureAwait(false));
await _imagePipeline.ClearCachesAsync().ConfigureAwait(false);
Assert.IsFalse(_imagePipeline.IsInBitmapMemoryCache(request));
Assert.IsFalse(await _imagePipeline.IsInDiskCacheAsync(request).ConfigureAwait(false));
}
