Convert Bitmap Image to byte array (Windows phone 8)

Question

I am new to windows phone dev. My small app need a bytesarray from image (photo gallery). I tried many ways to convert, but it did not work fine.

here is my code:

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Answer 1

To anyone who finds this, this works;

Image to bytes;

public static byte[] ImageToBytes(BitmapImage img)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                WriteableBitmap btmMap = new WriteableBitmap(img);
                System.Windows.Media.Imaging.Extensions.SaveJpeg(btmMap, ms, img.PixelWidth, img.PixelHeight, 0, 100);
                img = null;
                return ms.ToArray();
            }
        }

Bytes to Image

public static BitmapImage BytesToImage(byte[] bytes)
        {
            BitmapImage bitmapImage = new BitmapImage();
            try
            {
                using (MemoryStream ms = new MemoryStream(bytes))
                {
                    bitmapImage.SetSource(ms);
                    return bitmapImage;
                }
            }
            finally { bitmapImage = null; }
        }