#699 – Converting an Image Control to a Bitmap

You may want to work with the image from an Image control as a standard Windows bitmap.  You can convert the System.Windows.Controls.Image to a System.Drawing.Bitmap as follows (imgLife is an Image control):

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            RenderTargetBitmap rtBmp = new RenderTargetBitmap((int)imgLife.ActualWidth, (int)imgLife.ActualHeight,
                96.0, 96.0, PixelFormats.Pbgra32);

            imgLife.Measure(new System.Windows.Size((int)imgLife.ActualWidth, (int)imgLife.ActualHeight));
            imgLife.Arrange(new Rect(new System.Windows.Size((int)imgLife.ActualWidth, (int)imgLife.ActualHeight)));

            rtBmp.Render(imgLife);

            PngBitmapEncoder encoder = new PngBitmapEncoder();
            MemoryStream stream = new MemoryStream();
            encoder.Frames.Add(BitmapFrame.Create(rtBmp));

            // Save to memory stream and create Bitamp from stream
            encoder.Save(stream);
            System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(stream);

            // Demonstrate that we can do something with the Bitmap
            bitmap.Save(@"D:\Temp\Life.png", ImageFormat.Png);

            // Optionally, if we didn't need Bitmap object, but
            // just wanted to render to file, we could:
            //encoder.Save(new FileStream(@"D:\Temp\Life-Other.png", FileMode.Create));
        }
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