Convert back a byte array to imagebrush

Question

I am updating an image. I create a byte[] from that picture no problem. I update (change some pixels). I want to display it back in a Canvas (context c#, UWP) I have tried the following code:

 private async void DisplayBytes(byte[] array)
        {
            var writeableBitmapSource = new WriteableBitmap((int)c_OriginalWidth, (int)c_OriginalHeight);
            using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
            {
                await stream.WriteAsync(array.AsBuffer());

                var a = stream.Size;
                var b = stream.Position;
                writeableBitmapSource.SetSource(stream);
            }
            ImageBrush localbrush = new ImageBrush
            {
                ImageSource = writeableBitmapSource,
                Stretch = Stretch.Uniform
            };
            ImagePanelTarget.Background = localbrush;
        }

I just get blank page; what am I doing wrong?

Answer 1

Hello,

Welcome to Microsoft Q&A.

Please try the following code as an approach:

private async void DisplayBytes(byte[] array)  
{  
    var writeableBitmapSource = new WriteableBitmap((int)c_OriginalWidth, (int)c_OriginalHeight);  
    using (Stream stream = writeableBitmapSource.PixelBuffer.AsStream())  
    {  
        await stream.WriteAsync(array, 0, array.Length);  
    }  
    ImageBrush localbrush = new ImageBrush  
    {  
        ImageSource = writeableBitmapSource,  
        Stretch = Stretch.Uniform  
    };  
    ImagePanelTarget.Background = localbrush;  
}  

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