private async void MoveOutControlBlankPage_Loaded(object sender, RoutedEventArgs e)
{
RandomAccessStreamReference rass = RandomAccessStreamReference.CreateFromUri(new Uri("http://ww1.sinaimg.cn/bmiddle/643be833jw1e4nzv4dc12j20dc0hsq4g.jpg", UriKind.RelativeOrAbsolute));
IRandomAccessStreamWithContentType streamRandom = await rass.OpenReadAsync();
var cloneStream = streamRandom.CloneStream();
wb = new WriteableBitmap(1, 1);
//wb = await (new WriteableBitmap(1, 1).FromStream(streamRandom));
await wb.SetSourceAsync(streamRandom);
//this.image.Source = wb;
wbOriginal = WriteableBitmapExpansion.CopyWriteableBitmap(wb);
var bi = new BitmapImage();
await bi.SetSourceAsync(cloneStream);
this.imageOriginal.Source = bi;
this.image.Source = BlurEffect.WriteableBitmapBlur(wb, Convert.ToInt32(sliderRadius.Value), sliderSigma.Value);
}
