int seconds;
            using (var reader = new SpeechSynthesizer())
            {

                if (int.TryParse(After_Second.Text, out seconds))
                {
                    using (Process myProcess = new Process())
                    {
                        myProcess.StartInfo.FileName = "cmd.exe";
                        myProcess.StartInfo.UseShellExecute = false;
                        myProcess.StartInfo.RedirectStandardInput = true;
                        myProcess.StartInfo.RedirectStandardOutput = true;
                        myProcess.StartInfo.RedirectStandardError = true;
                        myProcess.StartInfo.CreateNoWindow = true;
                        myProcess.Start();
                        reader.Speak(string.Format("计算机将在{0}秒后关机", seconds));
                        myProcess.StandardInput.WriteLine(string.Format("shutdown -s -t {0}", seconds));
                        var webClient = new WebClient() { Encoding = Encoding.UTF8 };

                        var location = webClient.DownloadString("http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json");
                        var json = new JavaScriptSerializer().Deserialize<dynamic>(location);

                        json["city"] = json["city"] ?? HttpUtility.UrlEncode("北京");

                        var city = HttpUtility.UrlDecode(json["city"], Encoding.UTF8);
                        string url = string.Format("http://php.weather.sina.com.cn/xml.php?city={0}&password=DJOYnieT8234jlsK&day=0", HttpUtility.UrlEncode(city, Encoding.GetEncoding("gb2312")));
                        string weather = webClient.DownloadString(url);
                        var xml = new XmlDocument();
                        xml.LoadXml(weather);
                        Response.Write(xml);
                        var root = xml.SelectSingleNode("/Profiles/Weather");
                        var detail = root["status1"].InnerText + "，" + root["direction1"].InnerText
                                        + root["power1"].InnerText.Replace("-", "到") + "级，"
                                        + root["gm_s"].InnerText + root["yd_s"].InnerText;
                        reader.Speak("今天是" + DateTime.Now.ToShortDateString() + "，" + city + " " + detail);
                    }

                }
                else
                {
                    reader.Speak("应该输入整数");
                }

            }

事件代码: 3005 
事件消息: 发生了未经处理的异常。 
事件时间: 2013/11/21 20:47:25 
事件时间(UTC): 2013/11/21 12:47:25 
事件 ID: 08881300a16a4e1fb2a56ed1747c5ae5 
事件序列: 16 
事件匹配项: 1 
事件详细信息代码: 0 
 
应用程序信息: 
    应用程序域: /LM/W3SVC/2/ROOT-4-130295109146037174 
    信任级别: Full 
    应用程序虚拟路径: / 
    应用程序路径: D:\WebRoot\WebTest\ 
    计算机名: SUPER-PC 
 
进程信息: 
    进程 ID: 7288 
    进程名: w3wp.exe 
    帐户名: IIS APPPOOL\DefaultAppPool 
 
异常信息: 
    异常类型: HttpUnhandledException 
    异常消息: 引发类型为“System.Web.HttpUnhandledException”的异常。
   在 System.Web.UI.Page.HandleError(Exception e)
   在 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   在 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   在 System.Web.HttpContext.InvokeCancellableCallback(WaitCallback callback, Object state)
   在 System.Web.UI.Page.LegacyPageAsyncInfo.CallHandlersPossiblyUnderLock(Boolean onPageThread)

只能在执行 Render() 的过程中调用 RegisterForEventValidation；
   在 System.Web.UI.ClientScriptManager.RegisterForEventValidation(String uniqueId, String argument)
   在 System.Web.UI.WebControls.TextBox.AddAttributesToRender(HtmlTextWriter writer)
   在 System.Web.UI.WebControls.WebControl.RenderBeginTag(HtmlTextWriter writer)
   在 System.Web.UI.WebControls.TextBox.Render(HtmlTextWriter writer)
   在 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
   在 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   在 System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer)
   在 System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer)
   在 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
   在 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   在 System.Web.UI.Page.Render(HtmlTextWriter writer)
   在 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
   在 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

 
 
请求信息: 
    请求 URL: http://192.168.1.100:8888/default.aspx 
    请求路径: /default.aspx 
    用户主机地址: 192.168.1.103 
    用户:  
    是否已经过身份验证: False 
    身份验证类型:  
    线程帐户名: IIS APPPOOL\DefaultAppPool 
 
线程信息: 
    线程 ID: 7 
    线程帐户名: IIS APPPOOL\DefaultAppPool 
    是否正在模拟: False 
    堆栈跟踪:    在 System.Web.UI.Page.HandleError(Exception e)
   在 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   在 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   在 System.Web.HttpContext.InvokeCancellableCallback(WaitCallback callback, Object state)
   在 System.Web.UI.Page.LegacyPageAsyncInfo.CallHandlersPossiblyUnderLock(Boolean onPageThread)
 
 
自定义事件详细信息: