C# 多线程 HTTP request

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Net;

 //by  wgscd

//2011-8-25

namespace TesMutiRequest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            delDisplay = new deldisp(display);
        }


        delegate void deldisp(string strInput);
       
        deldisp delDisplay;

        Util tool = new Util();

        private void button1_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 100; i++)
            {
                Thread th = new Thread(new ThreadStart(doLoadpage));
                th.Start();

            }

 

        }


        int icount = 0;

        void doLoadpage() {


            Random rnd = new Random();
    
            while  (true)
            {

               icount++;
                string strResult = tool.getPage("http://www.112.com/?t=" + rnd.Next(12222, 45555).ToString(),"get",null );
                if (strResult.StartsWith("err"))
                {
                    display(icount.ToString()+" : "+strResult);

                }

                else
                {

                    display(icount.ToString() + " : ok");
                }

                Thread.Sleep(122);
            

            }

        
        
        
        }

 

        void display(string strInput)
        {

            if (InvokeRequired)
            {

                Invoke(delDisplay, strInput);


            }
            else
            {
                txtReport.AppendText("[" + DateTime.Now.ToString() + "]" + strInput + "\r\n");
            }


        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {


            Application.ExitThread();

           
        }

 

    }
}



-----------------------------------



using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Threading;


namespace TesMutiRequest
{
    class Util


    {

        public Util() {

            proxy.Credentials = new NetworkCredential("wgscd","32423432");

        }

        WebProxy proxy = new WebProxy("proxy.cd.ncsi.com.cn",8080);

        public string getPage(string strUrl, string strMethod, byte[] strData)
        {

            try
            {
                WebClient wc = new WebClient();

//使用代理
                wc.Proxy = proxy;   
                //wc.Headers.Add("Set-Cookie", Common.cookie);

                wc.Headers.Add("Method", strMethod);
                wc.Encoding = Encoding.GetEncoding("gb2312");
                wc.Headers.Add("ContentType", "application/x-www-form-urlencoded");

                // wc.Headers.Add("AcceptEncoding", "gzip,deflate,sdch");

                if (strMethod.ToUpper() == "POST")
                {
                    return Encoding.UTF8.GetString(wc.UploadData(strUrl, strData));

                }
                else {

                    return wc.DownloadString(strUrl);
                
                }

            }
            catch (Exception ex)
            {

                return "err:" + ex.Message;



            }


        }

 

    }
}