C# Screenshot when screen is sleeping

[Mattius]

I've written an app that grabs parts of the screen from a live feed and saves them as an image. All works fine until the screen sleeps, then the live feed stops working.
If the screen saver is activated i get grabs of the screensaver.

Is there any way of grabbing the screen while the screen is asleep?

            var screen = Screen.PrimaryScreen;
            using (var bitmap = new Bitmap(200,160))
            using (var graphics = Graphics.FromImage(bitmap))
            {
                graphics.CopyFromScreen(new Point(10, 10), new Point(0, 0), screen.Bounds.Size);
                bitmap.Save("C:\\inetpub\\wwwroot\\Cam1.png", ImageFormat.Png);
            }

 

[GravyMonster]

Try using Pinvoke SetThreadExecutionState to stop the machine going into sleep.

I don't think you can capture the screen 'underneath' the sleeping state.

 

[Mattius]

yeah i know i can stop the monitor sleeping, i just didn't want to stop it.

Is there a way i can copy from underneath the screensaver? or will it stop updating the screen underneath when the screensaver is active?

 

[GravyMonster]

I'm pretty sure you can't as screen output is stopped once sleep mode starts, so there is nothing to put into the image.

 

[Mattius]

that sucks, cheers.

Looks like im gonna have to try and decode the feed.