public class WebSiteThumbnail{Bitmap m_Bitmap;string m_Url;public WebSiteThumbnail(string Url){m_Url = Url;}public static Bitmap GetWebSiteThumbnail(string Url){WebSiteThumbnail thumbnailGenerator = new WebSiteThumbnail(Url);return thumbnailGenerator.GenerateWebSiteThumbnailImage();}public Bitmap GenerateWebSiteThumbnailImage(){Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));m_thread.SetApartmentState(ApartmentState.STA);m_thread.Start();m_thread.Join();return m_Bitmap;}private void _GenerateWebSiteThumbnailImage(){WebBrowser m_WebBrowser = new WebBrowser();m_WebBrowser.ScrollBarsEnabled = false;m_WebBrowser.Navigate(m_Url);m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)Application.DoEvents();m_WebBrowser.Dispose();}private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e){WebBrowser m_WebBrowser = (WebBrowser)sender;//取得页面宽度和高度var w = m_WebBrowser.Document.Body.ScrollRectangle.Width;var h = m_WebBrowser.Document.Body.OffsetRectangle.Bottom;//执行.js出错时任执行m_WebBrowser.ScriptErrorsSuppressed = true;m_WebBrowser.ClientSize = new Size(w,h);m_WebBrowser.ScrollBarsEnabled = false;m_Bitmap = new Bitmap(w,h);m_WebBrowser.BringToFront();m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(w,h, null, IntPtr.Zero);}}

public ActionResult Index(){var url = "/home/show";var rnd=new Random();var saveurl =Path.Combine(System.AppDomain.CurrentDomain.BaseDirectory,"downpic",rnd.Next(10)+".jpg");Bitmap m_Bitmap = WebSiteThumbnail.GetWebSiteThumbnail(url);m_Bitmap.Save(saveurl, System.Drawing.Imaging.ImageFormat.Png);//JPG、GIF、PNG等均可
ViewBag.url = "/downpic/" + Path.GetFileName(saveurl);return View();}