Taking screenshot of a webpage programmatically [closed]

Answer 1

You can try calling the native PrintWindow function.

Answer 2

You could also try P/Invoking BitBlt() from gdi32.dll. Try this code:

Graphics mygraphics = webBrowser1.CreateGraphics();
Size s = new Size(1024, 768);
Bitmap memoryImage = new Bitmap(s.Width, s.Height, mygraphics);
Graphics memoryGraphics = Graphics.FromImage(memoryImage);
IntPtr dc1 = mygraphics.GetHdc();
IntPtr dc2 = memoryGraphics.GetHdc();
// P/Invoke call here
BitBlt(dc2, 0, 0, webBrowser1.ClientRectangle.Width, webBrowser1.ClientRectangle.Height, dc1, 0, 0, 13369376);
mygraphics.ReleaseHdc(dc1);
memoryGraphics.ReleaseHdc(dc2);
memoryImage.Save(filename);

The P/Invoke would be:

[DllImport("gdi32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool BitBlt(IntPtr hdc, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, uint dwRop);

Answer 3

Drawing the browser control to a bitmap is somewhat unreliable. I think it would be better to just screenscrape your window.

using (Bitmap bitmap = new Bitmap(bitmapSize.Width, bitmapSize.Height, PixelFormat.Format24bppRgb))
using (Graphics graphics = Graphics.FromImage(bitmap))
{
    graphics.CopyFromScreen(
        PointToScreen(webBrowser1.Location),
        new Point(0, 0), 
        bitmapSize);
        bitmap.Save(filename);
}

Answer 4

I searched and searched and searched and found it Webpage thumbnailer (a The Code Project article).