/// <summary>
/// Convert any control to a PngBitmapEncoder
/// </summary>
/// <param name="controlToConvert">The control to convert to an ImageSource</param>
/// <returns>The returned ImageSource of the controlToConvert</returns>
private static PngBitmapEncoder getImageFromControl(Control controlToConvert)
{
// save current canvas transform
Transform transform = controlToConvert.LayoutTransform;
// get size of control
Size sizeOfControl = new Size(controlToConvert.ActualWidth, controlToConvert.ActualHeight);
// measure and arrange the control
controlToConvert.Measure(sizeOfControl);
// arrange the surface
controlToConvert.Arrange(new Rect(sizeOfControl));
// craete and render surface and push bitmap to it
RenderTargetBitmap renderBitmap = new RenderTargetBitmap((Int32)sizeOfControl.Width, (Int32)sizeOfControl.Height, 96d, 96d, PixelFormats.Pbgra32);
// now render surface to bitmap
renderBitmap.Render(controlToConvert);
// encode png data
PngBitmapEncoder pngEncoder = new PngBitmapEncoder();
// puch rendered bitmap into it
pngEncoder.Frames.Add(BitmapFrame.Create(renderBitmap));
// return encoder
return pngEncoder;
}
public static void ScreenCapture(Control control, string filename)
{
try
{
// The BitmapSource that is rendered with a Visual.
control.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
Size size = control.DesiredSize;
int width = (int)size.Width;
int height = (int)size.Height;
control.Arrange(new Rect(0, 0, width, height));
var rtb = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);
rtb.Render(control);
// Encoding the RenderBitmapTarget as a PNG file.
var png = new PngBitmapEncoder();
png.Frames.Add(BitmapFrame.Create(rtb));
using (Stream stm = File.Create(filename))
{
png.Save(stm);
}
}
finally
{
}
}
