WebBrowser.DrawtoBitmap() generating blank images for few sites consistently

Question

I\'ve been using WebBrowser.DrawtoBitmap() in my asp.net page running in separate STA thread to capture web pages as an image. But I found that I\'m getting blank images for

Answer 1

You're not hitting pages with Flash?

I had to do this, in order to get my WebBrowser control to work:

using System;
using System.Windows.Forms;

public class WebBrowserEx : WebBrowser
{
   public WebBrowserEx()
   {
   }

   protected override void WndProc(ref Message m)
   {
      switch (m.Msg)
      {
         case 0x021:
         case 0x201:
         case 0x204:
         case 0x207:
             base.DefWndProc(ref m);
             return;
      }
      base.WndProc(ref m);
   }
}

I seriously have no idea what I was doing, I just found it somewhere and it was to enable Flash. But I think I haven't had to much problems with it since.

I use it to do screenshots. I run it on a separate STA thread (as a windows service - nothing visible).