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 = 0;
//等待 页面加载完毕 并获取到参数
                while (string.IsNullOrWhiteSpace(htmlstr) && timespan < 10)
                {
                    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;

        }