C#Socket通讯实例

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

namespace SocketServer
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button_Monitor_Click(  sender, EventArgs e)
        {
            try
            {
                //点击开始监听时，在服务器端创建一个负责监听IP和端口号的Socket  
                Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                IPAddress ip = IPAddress.Any;
                IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(textBox_Port.Text));
                socketWatch.Bind(point);    //绑定端口号
                ShowMsg(\"监听成功\");
                socketWatch.Listen(10);

                //创建监听线程
                Thread thread = new Thread(Listen);
                thread.IsBackground = true;
                thread.Start(socketWatch);
            }
            catch { }
        }

        void ShowMsg(string strRecords)
        {
            listBox_Recv.Items.Add(strRecords + \"\\r\\n\");
        }

        /// <summary>
        /// 等待客户端的连接，并且创建与之通信的Socket
        /// </summary>
        /// <param name=\"o\"></param>
        Socket socketSend;
        void Listen(  o)
        {
            try
            {
                Socket socketWatch = o as Socket;
                while (true)
                {
                    socketSend = socketWatch.Accept();
                    ShowMsg(socketSend.RemoteEndPoint.ToString() + \": 连接成功！\");

                    Thread r_thread = new Thread(Received);
                    r_thread.IsBackground = true;
                    r_thread.Start(socketSend);
                }
            }
            catch { }
        }

        /// <summary>
        /// 服务器端不停的接受来自客户端的消息
        /// </summary>
        /// <param name=\"o\"></param>
        void Received(  o)
        {
            try
            {
                Socket socketSend = o as Socket;
                while (true)
                { 
                    //客户端连接服务器端成功后，服务器端接受客户端发出的消息
                    byte[] buffer = new byte[1024 * 1024 * 3];
                    //实际接收到的有效字节数
                    int Len = socketSend.Receive(buffer);
                    if (Len == 0)
                    {
                        break;
                    }
                    string str = Encoding.UTF8.GetString(buffer, 0, Len);
                    ShowMsg(DateTime.Now.ToString() + \"(客户端):\" + str);
                }
            }
            catch { }
        }

        /// <summary>
        /// 服务器向客户端发送消息
        /// </summary>
        /// <param name=\"str\"></param>
        void Send(string str)
        {
            try
            {
                byte[] buffer = Encoding.UTF8.GetBytes(str);
                socketSend.Send(buffer);
            }
            catch { }
        }

        private void Form1_Load(  sender, EventArgs e)
        {
            Control.CheckForIllegalCrossThreadCalls = false;
        }

        private void textBox1_KeyDown(  sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                Send(textBox1.Text.Trim());
                ShowMsg(DateTime.Now.ToString() + \"(服务器):\" + textBox1.Text);
                textBox1.Clear();
            }
        }
    }
}