using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Threading;using System.Runtime.Remoting.Messaging;using System.IO;namespace TestApp.ResponseHeader{    public partial class Demo : System.Web.UI.Page    {        public delegate void SendMailHandler();        protected void Page_Load(object sender, EventArgs e)        {            Response.ClearHeaders();            Response.AddHeader("Server", "nginx");            Response.AddHeader("testID", Session.SessionID);        }        protected void Button1_Click(object sender, EventArgs e)        {            string userName = this.TextBox1.Text;            Response.Write(string.Format("当前注册的用户是:{0}",userName));            SendMailHandler sendMailHandler = new SendMailHandler(SendMail);            AsyncCallback callBack = new AsyncCallback(SendMailCallBack);            sendMailHandler.BeginInvoke(callBack, userName);        }        public void SendMailCallBack(IAsyncResult re)        {            AsyncResult result = re as AsyncResult;            SendMailHandler handler = (SendMailHandler)result.AsyncDelegate;            handler.EndInvoke(re);            WriteLog(string.Format("{0},您的注册邮件已经发送...", re.AsyncState));            WriteLog(string.Format("{0}::邮件发送完毕...", DateTime.Now));        }        private void SendMail()        {            WriteLog(string.Format("{0}::开始发送邮件...", DateTime.Now));            Thread.Sleep(20000);            //ThreadStart ts = new ThreadStart(Run);            string s = "gogogo...";            ParameterizedThreadStart pts = new ParameterizedThreadStart(Run);            Thread t = new Thread(pts);            t.Start(s);        }        private void WriteLog(string log)        {           StreamWriter sw = File.AppendText(Server.MapPath("~/text.txt"));           sw.WriteLine(log);           sw.Flush();           sw.Close();        }        public void Run(object s)        {            WriteLog(s.ToString());        }    }}

结果如下图