How do I get a bitmap of the WatiN image element?

Question

I have some textfields processed and other elements, but I want to get the bitmap so I can save it somewhere on disk. I need to do it directly from WatiN if this is possible

Answer 1

public Image GetImageFromElement(IHTMLElement Element)
    {
        int width = (int)Element.style.width;
        int height = (int)Element.style.height;
        IHTMLElementRender2 render = (IHTMLElementRender2)Element;

        Bitmap screenCapture = new Bitmap(width, height);
        Rectangle drawRectangle = new Rectangle(0, 0, width, height);
        this.DrawToBitmap(screenCapture, drawRectangle);
        Graphics graphics = Graphics.FromImage(screenCapture);

        IntPtr graphicshdc = graphics.GetHdc();
        render.DrawToDC(graphicshdc);
        graphics.ReleaseHdc(graphicshdc);
        graphics.Dispose();

        return screenCapture as Image;
    }

That's the Method i use for php generated images. It's implimented in my own WebBrowserClass, which extends the webbrowser control.

(so "this" = WebBrowser)

But we have to import the IHTMLElementRender2 interface, to use the method.

[Guid("3050f669-98b5-11cf-bb82-00aa00bdce0b"),
         InterfaceType(ComInterfaceType.InterfaceIsIUnknown),
         ComVisible(true),
         ComImport]
    interface IHTMLElementRender2
    {
        void DrawToDC([In] IntPtr hDC);
        void SetDocumentPrinter([In, MarshalAs(UnmanagedType.BStr)] string bstrPrinterName, [In] IntPtr hDC);
    };

I found this method in web, about 1 year ago, so if you search for it you might find more information.

Iwan