winform的TcpListener TcpClient问题，请高手帮忙解答，很着急，在线等，谢谢
请问：
1，下面的客户端服务器端连接，为什么只能连接一次？第二次就连接不上了
2，是多客户端连接，请指教，谢谢，在线等
ServerFrm.cs
/**********TcpListener和TcpClient研究********** * 要点一:TcpListener起动后,如果有客户请求,就会建立一个TcpClient连接. * 要点二:通过TcpClient取得NetworkStream对象 * 要点三:通过NetworkStream的Write和Read方法向连接的另一端发或接收数据 * 要点四:传输的数据只能是字符流,需要编码. **********************************************/using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.IO;using System.Net;using System.Net.Sockets;using System.Threading;namespace WinNet{ public partial class ServerFrm : Form { private Thread processor; private TcpListener tcpListener; string clientStr; public ServerFrm() { InitializeComponent(); ServerFrm_Load(); } private void ServerFrm_Load() { //需要在新的线程里监听客户端 try { processor = new Thread(new ThreadStart(StartListening)); processor.Start(); } catch (Exception ex) { } } private void StartListening() { //创建一个监听对象 tcpListener = new TcpListener(IPAddress.Any, 8081); tcpListener.Start(); //循环监听 while (true) { try { //取得客户端的连接 TcpClient tcpClient = tcpListener.AcceptTcpClient(); //取得客户端发过来的字节流 NetworkStream clientStream = tcpClient.GetStream(); //把字节流读入字节数组 byte[] buffer = new byte[51]; clientStream.Read(buffer,0,51); //不可以在此直接设置this.Text,线程问题. clientStr = System.Text.Encoding.ASCII.GetString(buffer); string strURL = "http://65.58.53.45:8088/data.aspx"; HttpWebRequest request; request = (HttpWebRequest)WebRequest.Create(strURL); //Post请求方式 request.Method = "POST"; //内容类型 request.ContentType = "application/x-www-form-urlencoded"; //参数经过URL编码 string paraUrlCoded = "value=22";//测试数据 byte[] payload; //将URL编码后的字符串转化为字节 payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded); //设置请求的ContentLength request.ContentLength = payload.Length; //获得请求流 Stream writer = request.GetRequestStream(); //将请求参数写入流 writer.Write(payload, 0, payload.Length); //关闭请求流 writer.Close(); } catch { } } } }}using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Net;using System.Net.Sockets;namespace WinNet{ public partial class ClientFrm : Form { private TcpClient tcpClient; public ClientFrm() { InitializeComponent(); tcpClient = new TcpClient(); IPHostEntry host = Dns.GetHostEntry("127.0.0.1"); tcpClient.Connect(host.AddressList[0], 8081); } private void ClientFrm_Load(object sender, EventArgs e) { //这就是服务器与客户端的一条通讯线路 //得到服务器端IP,然后建立一个连接 //取得数据流 NetworkStream clientStream = tcpClient.GetStream(); //只能向服务器发送字节流,所以要编码 byte[] response = new byte[this.textBox1.Text.Length]; response = System.Text.Encoding.ASCII.GetBytes(this.textBox1.Text.ToCharArray()); //通过Write方法把客户端数据发向服务器 clientStream.Write(response, 0, this.textBox1.Text.Length); } }}