Generate Screenshot From WebBrowser Control

Question

Hi Guys,

I grabbed some code from the link below to generate a screenshot from a web browser control: http://pietschsoft.com/post/2008/07/C-Generate-WebPage-Thumbmail-Screenshot-Image.aspx

Then, I modified to be an extension method like so:

public static Bitmap GetScreenshot(this WebBrowser webBrowser)
        {
            // Load the webpage into a WebBrowser control
            using (WebBrowser wb = new WebBrowser())
            {
                wb.ScrollBarsEnabled = false;
                wb.ScriptErrorsSuppressed = true;
                wb.Navigate(webBrowser.Url);
                while (wb.ReadyState != WebBrowserReadyState.Complete)
                {
                    Application.DoEvents();
                }

                // Set the size of the WebBrowser control
                wb.Width = wb.Document.Body.ScrollRectangle.Width;
                wb.Height = wb.Document.Body.ScrollRectangle.Height;

                // Get a Bitmap representation of the webpage as it's rendered in the WebBrowser control
                Bitmap bitmap = new Bitmap(wb.Width, wb.Height);
                wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height));

                return bitmap;
            }
        }

It works great for most web pages, but I am trying to use it for a SharePoint site and the image is coming out as 250x250 every time. :-s

Any geniuses here that can give me a solution?

Thanks in advance

Answer 1

Surely there must be someone out there that knows? :-(

Answer 2

Well, the reason for this seems to be that my new WebBrowser (wb) is uninitialized even after I call Navigate(). The Url property shows as null. This is weird. Does it mean I cannot create a WebBrowser in code and never display it? It would be a shame to have to display the thing. :-(