c# - 如何将流转换为 BitmapImage？

Question

我正在尝试使用以下代码将 MemoryStream 转换为 Image。

  Stream stream = new MemoryStream(bytes);
  BitmapImage bitmapImage = new BitmapImage();
  await bitmapImage.SetSourceAsync(stream.AsRandomAccessStream());

但是在SetSourceAsync方法中抛出异常，异常是

System.Exception was unhandled by user code HResult=-2003292336 Message=The component cannot be found. (Exception from HRESULT: 0x88982F50) Source=mscorlib StackTrace: at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotificat ion(Task task) at System.Runtime.CompilerServices.TaskAwaiter.GetResult() at ImageEditor_UWP.MainPage.d__1.MoveNext() InnerException:

如何将流转换为图像？

Answer 1

图片:

public async static System.Threading.Tasks.Task<BitmapImage> ImageFromBytes(byte[] bytes)
{
    var image = new BitmapImage();

    try
    {
        var stream = new Windows.Storage.Streams.InMemoryRandomAccessStream();
        await stream.WriteAsync(bytes.AsBuffer());
        stream.Seek(0);
        await image.SetSourceAsync(stream);
    }
    catch (Exception ex)
    {
        System.Diagnostics.Debug.WriteLine(ex.Message);
    }

    return image;
}