How to take a screenshot with Mono C#?

Question

I'm trying to use use code get a screenshot in Mono C# but I'm getting a System.NotImplementedException when I call CopyFromScreen. My code works with .NET, so is there an alternate way of getting a screenshot using Mono?

Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
Graphics graphics = Graphics.FromImage(bitmap as Image);
graphics.CopyFromScreen(0, 0, 0, 0, bitmap.Size);
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();
bitmap.Save(memoryStream, imageFormat);
bitmap.Save(@"\tmp\screenshot.png", ImageFormat.Png);

I am using Mono JIT compiler version 2.4.2.3 (Debian 2.4.2.3+dfsg-2)

UPDATE: Mono cannot take screenshots. Sad. Lame.

Answer 1

I guess an alternative would be using gtk# to get a screenshot. You would need to create a mono project with GTK# support, after that following code should execute:

Gdk.Window window = Gdk.Global.DefaultRootWindow;
if (window!=null)
{           
    Gdk.Pixbuf pixBuf = new Gdk.Pixbuf(Gdk.Colorspace.Rgb, false, 8, 
                                       window.Screen.Width, window.Screen.Height);          
    pixBuf.GetFromDrawable(window, Gdk.Colormap.System, 0, 0, 0, 0, 
                           window.Screen.Width, window.Screen.Height);          
    pixBuf.ScaleSimple(400, 300, Gdk.InterpType.Bilinear);
    pixBuf.Save("screenshot0.jpeg", "jpeg");
}

you could also use P\Invoke and call GTK functions directly.

hope this helps, regards