BitmapImage转为byte_array，byte_array转为Image控件画到界面中

http://www.devdiv.com/Windows_Phone-Windows_Phone中BitmapImage转为byte_array，byte_array转为Image控件画到界面中-thread-144736-1-1.html

C#代码

public static byte[] ImageToByteArray(BitmapImage imageSource)

{

    using(MemoryStream ms = new MemoryStream())

    {

        WriteableBitmap btmMap = new WriteableBitmap(imageSource);

        // write an image into the stream

        Extensions.SaveJpeg(btmMap,ms,imageSource.PixelWidth, imageSource.PixelHeight, 0, 100);

         return ms.ToArray();

    }

}

public static Image ByteArrayToImage(byte[] bits)
{
    BitmapImage btmMap = new BitmapImage();
    using (MemoryStream sm = new MemoryStream(bits))
    {
        btmMap.CreateOptions = BitmapCreateOptions.DelayCreation;
        btmMap.SetSource(sm);
        Image img = new Image();
        img.Source = btmMap;
        return img;
    }
}

private void button_Click(object sender, RoutedEventArgs e)
{
    BitmapImage img = new BitmapImage(new Uri("/Image/a.jpg", UriKind.RelativeOrAbsolute));
    img.CreateOptions = BitmapCreateOptions.None;
    byte[] bits = ImageToByteArray(img);
    Image image1 = ByteArrayToImage(bits);
    StackPanel1.Children.Add(image1);
}