Webbrowser 在web项目中的使用

         string htmlstr = string.Empty;
 [STAThread]
         public string GetHtmlByWeb(string url)
         {
             try
             {

                 RunWithSingleThread(url);
                 DateTime dtime = DateTime.Now;
                 double timespan = ;
 //等待 页面加载完毕 并获取到参数
                 while (string.IsNullOrWhiteSpace(htmlstr) && timespan < )
                 {
                     DateTime time2 = DateTime.Now;
                     timespan = (time2 - dtime).TotalSeconds;
                 }
                 // double lo = DateTime.Now.Subtract(dtime).TotalSeconds;
             }
             catch (Exception)
             {

             }
             finally
             {
                 if (t != null && t.ThreadState == ThreadState.Running)
                 {
                     t.Abort();
                 }
             }

             return htmlstr;
         }

 //线程
  private Thread t;
 //异步执行WebBrowser
         public void RunWithSingleThread(object url)
         {
             ParameterizedThreadStart ps = new ParameterizedThreadStart(GetHtmlWithBrowser);
             t = new Thread(ps);
             t.IsBackground = true;
             t.ApartmentState = ApartmentState.STA;
             t.Start(url);
         }  

 private WebBrowser wb;
         private void GetHtmlWithBrowser(object url)
         {
             htmlstr = string.Empty;

             wb = new WebBrowser();
             wb.ScriptErrorsSuppressed = true;  //防止脚本异常跳出弹窗
             wb.ScrollBarsEnabled = true;
             wb.Navigate(url.ToString());

             wb.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(DocumentCompleted);
             while (wb.ReadyState != System.Windows.Forms.WebBrowserReadyState.Complete)
             {
                 System.Windows.Forms.Application.DoEvents(); //避免假死，若去掉则可能无法触发 DocumentCompleted 事件。
             }

         }
 //获取内容
  public void DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
         {
             htmlstr = wb.Document.Body.InnerHtml;

         }