C#关于端口监听的问题，帮帮小弟吧高手大哥大姐！

Question

我的程序主要是监听一个端口，实现点对点的传输，但是这在里我只能监听自己的IP也端口，当我把IP改为另一台计算机的IP时，就会出现
“在其上下文中，该请求的地址无效。”
这样的错误原码是从网上找的，小弟我对这方面不了解，希望大哥大姐们帮帮
 /// <summary>
        /// 根据给定的服务器和端口号建立连接
        /// </summary>
        /// <param name="strHost">服务器名</param>
        /// <param name="iPort">端口号</param>
        /// <returns></returns>
        public static Socket ConnectToServer(string strHost, int iPort,TextBox getinfor)
        {
            try
            {
                GetInfor = getinfor;
                IPAddress ipAddress = Dns.Resolve(strHost).AddressList[0];
                IPEndPoint ipPoint = new IPEndPoint(ipAddress, iPort);                Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                s.Connect(ipPoint);
                return s;
            }
            catch (Exception e)
            {
                throw (new Exception("建立到服务器的连接出错" + e.Message));
            }
        }
……
……
   //下面是服务器端接受信息的代码：创建监听：
        ///<summary>
        ///再给定的主机和端口上创建监听程序
        ///</summary>
        ///<paramname="strAddress"></param>
        ///<paramname="iPort"></param>
        public void BuildingServer(string strAddress, int iPort)
        {
            IPAddress ipAddress = Dns.Resolve(strAddress).AddressList[0];
            try
            {
                listener = new TcpListener(ipAddress, iPort);
            }
            catch (Exception e)
            {
                AddInfo(e.Message);
            }
        }        private void AddInfo(string p)
        {
            throw new Exception("The method or operation is not implemented.");
        }
        //开始监听：
        ///<summary>
        ///开始监听
        ///</summary>
        private TextBox tbLog = null;
        public void StartListen()
        {
            bool done = false;
            listener.Start();//问题就是在这里出现的“**在其上下文中，该请求的地址无效**”
            while (!done)
            {
                Socket s = listener.AcceptSocket();
                if (s != null)
                {
                    DealWithSocket dws = new DealWithSocket(s, this.tbLog);
                    
                    StartThread(new ThreadStart(dws.DealWith));
                }
            }
        }下面是我这样帮定IP与端口的
……
……
CommunClass db = new CommunClass();
        string Bindhost = "192.168.0.249";//**当我把这个IP改为其他IP（192.168.0.246）时就会出现那个错误也就是说我监听不了别的计算机
        int Bindport = 8080;
        string filename = "";
        public Form1()
        {            InitializeComponent();
            db.BuildingServer(Bindhost, Bindport);
            ThreadStart threadDelegate = new ThreadStart(db.StartListen);
            Thread newThread = new Thread(threadDelegate);
            newThread.Start();        }

Answer 1

这种例子网上很多阿，google一下就有了 
http://blog.csdn.net/3cts/archive/2007/08/08/1731596.aspx
看看吧

Answer 2

http://topic.csdn.net/t/20031001/22/2320478.html

Answer 3

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.Sockets;
using System.Threading;
using System.Net;namespace File_Transfer
{
    public partial class Client : Form
    {
        //变量
        private ThreadStart start;
        private Thread listenThread;
        static private bool m_bListening = false;
        static private System.Net.IPAddress MyIP = System.Net.IPAddress.Parse("127.0.0.1");
        static private TcpListener listener = new TcpListener(MyIP, 5567);
        private String msg;
        //初始化监听器
        public Client()
        {
           InitializeComponent();
        }        private void Client_Load(object sender, EventArgs e)
        {
             
            Control.CheckForIllegalCrossThreadCalls = false;
            start = new ThreadStart(startListen);
            listenThread = new Thread(start);   
        }        private void button1_Click(object sender, EventArgs e)
        {
            String mystr = textBox1.Text;
            string ipadd = textBox4.Text;
           this.sendmymsg(ipadd);
        }
        public void sendmymsg(string IPaddress)
        {
            try
            {
                TcpClient client = new TcpClient(IPaddress, 5567);
                NetworkStream sendStream = client.GetStream();
                //StreamWriter writer = new StreamWriter(sendStream);
                String msg = textBox1.Text;
                Byte[] sendBytes = Encoding.Default.GetBytes(msg);
                sendStream.Write(sendBytes, 0, sendBytes.Length);
                //writer.Flush();
                sendStream.Close();
                client.Close();
                textBox2.Text = "发送成功！！";            }
            catch(System.Exception e)
            {
                textBox2.Text = e.ToString();
            }
        }        private void textBox1_TextChanged(object sender, EventArgs e)
        {
           
        }//****************************** Server ******************************************
        private void showmore()
        {
            textBox3.Text = msg;
        }
        private void button2_Click(object sender, EventArgs e)
        {
            if (m_bListening)
            {
                m_bListening = false;
                label4.Text = "Server Idle...";
            }
            else
            {
                m_bListening = true;
                listenThread.Start();
                label4.Text = "Server Listening...";
            }
        }
        private void startListen()
        {
            //textBox1.Text = "listening...";
            listener.Start();
            //接收数据
            while (m_bListening)
            {
                //测试是否有数据
                try
                {
                    TcpClient client = listener.AcceptTcpClient();
                    NetworkStream ns = client.GetStream();
                    //StreamReader sr = new StreamReader(ns);//流读写器
                    //字组处理
                    byte[] bytes = new byte[1024];
                    int bytesread = ns.Read(bytes, 0, bytes.Length);
                    msg = Encoding.Default.GetString(bytes, 0, bytesread);
                    //显示
                    //MessageBox.Show(msg);
                    showmore();
                    ns.Close();
                    client.Close();
                    //清场                }
                catch (Exception re)
                {
                    MessageBox.Show(re.Message);
                }            }
            listener.Stop();
            //
        }        private void Client_FormClosed(object sender, FormClosedEventArgs e)
        {
            System.Environment.Exit(0); 
        }    }
}
谢谢各位!!