I would like to "copy to clipboard" what a Control
of my WPF
app draws on the screen.
Therefore, I need to build a bitmap image from my Control current display.
Is there an easy way to do that ?
Thanks in advance.
I wouldn't call it easy...but the key component is the RenderTargetBitmap, which you can use as follows:
RenderTargetBitmap rtb = new RenderTargetBitmap((int)control.ActualWidth, (int)control.ActualHeight, 96, 96, PixelFormats.Pbgra32);
rtb.Render(control);
Well, that part is easy, now the RTB has the pixels stored internally...but your next step would be putting that in a useful format to place it on the clipboard, and figuring that out can be messy...there are a lot of image related classes that all interact one or another.
Here's what we use to create a System.Drawing.Image, which i think you should be able to put on the clipboard.
PngBitmapEncoder png = new PngBitmapEncoder();
png.Frames.Add(BitmapFrame.Create(rtb));
MemoryStream stream = new MemoryStream();
png.Save(stream);
Image image = Image.FromStream(stream);
System.Drawing.Image (a forms image) cannot interact directly with the RenderTargetBitmap (a WPF class), so we use a MemoryStream to convert it.