I found the following code and am trying to implement it in a COM module:
public Bitmap GetThumbnail()
{
ThreadStart _threadstart = new ThreadStart(GenerateThumbnail);
Thread _thread = new Thread(_threadstart);
_thread.SetApartmentState(ApartmentState.STA);
_thread.Start();
_thread.Join();
return _image;
}
private void GenerateThumbnail()
{
WebBrowser _browser = new WebBrowser();
_browser.ScrollBarsEnabled = false;
_browser.ScriptErrorsSuppressed = true;
_browser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(_browser_DocumentCompleted);
_browser.Navigate(_url);
while (_browser.ReadyState != WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
_browser.Dispose();
}
void _browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
WebBrowser _browser = (WebBrowser)sender;
_browser.ClientSize = new Size(this._pagewidth开发者_如何学运维, this._pageheight);
_browser.ScrollBarsEnabled = false;
_image = new Bitmap(_browser.Bounds.Width, _browser.Bounds.Height);
_browser.BringToFront();
_browser.DrawToBitmap(_image, _browser.Bounds);
if (_imageheight != 0 && _imagewidth != 0)
_image = (Bitmap)_image.GetThumbnailImage(_imagewidth, _imageheight, null, IntPtr.Zero);
}
However, I've discovered that the Application.DoEvents() and COM do not work together. The code works great in a C# application, but it hangs when called via COM. As you can tell, I'm trying to get a website thumbnail, and I can't seem to figure out a substitute for the DoEvents().
Any suggestions?
Thanks, Kevin
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