Socket套接字通讯

借鉴前辈代码，增加了单台电脑测试方法，键两个控制台解决方案，一个做服务器一个做客户端即可，刚学写的不好，请谅解。
服务器代码

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

namespace TcpIpClint
{
    public class TcpIpClintEx
    {
        //创建 1个客户端套接字 和1个负责监听服务端请求的线程
        Thread threadclient = null;
        Socket socket = null;
        List<IPEndPoint> mlist = new List<IPEndPoint>();
        private StringBuilder msg = new StringBuilder();
        public string Msg
        {
            get { return msg.ToString(); }
            private set
            {
                msg.AppendLine(value);
                Console.WriteLine(value + "\r\n");
            }
        }

        public TcpIpClintEx(string ip, int port)
        {
            //定义一个套接字监听
            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //将获取的IP地址和端口号绑定在网络节点上
            //IPEndPoint point = new IPEndPoint(IPAddress.Parse(ip), port);
            //单机测试使用，需要断开无线
            IPEndPoint point = new IPEndPoint(IPAddress.Parse("127.0.0.1"),port);
            Msg = "正在连接服务器 " + ip + ":" + port;

            try
            {
                //客户端套接字连接到网络节点上，用的是Connect
              
                socket.Connect(point);
                Msg = ("连接成功\r\n");
            }
            catch (Exception)
            {
                Msg = ("连接失败\r\n");
                return;
            }

            threadclient = new Thread(recv);
            threadclient.IsBackground = true;
            threadclient.Start();
        }

        // 接收服务端发来信息的方法  
        private void recv()//
        {
            while (true)//持续监听服务端发来的消息
            {
                try
                {
                    //定义一个1M的内存缓冲区，用于临时性存储接收到的消息
                    byte[] arrRecvmsg = new byte[1024 * 1024];

                    //将客户端套接字接收到的数据存入内存缓冲区，并获取长度
                    int length = socket.Receive(arrRecvmsg);

                    //将套接字获取到的字符数组转换为人可以看懂的字符串
                    string strRevMsg = Encoding.UTF8.GetString(arrRecvmsg, 0, length);
                    if (strRevMsg == "")
                    { Msg = ("远程服务器已经中断连接" + "\r\n"); }
                    else
                    {
                        Msg = ("服务器:" + GetCurrentTime() + "IP:" + socket.RemoteEndPoint + ",的消息:" + strRevMsg + "\r\n\n");
                    }
                }
                catch (Exception ex)
                {
                    Msg = ("远程服务器已经中断连接" + "\r\n");
                    break;
                }
            }
        }

        //获取当前系统时间
        private string GetCurrentTime()
        {
            string timeStr = System.DateTime.Now.ToString("yyyy年MM月dd日hh时mm分ss秒fff毫秒。");
            return timeStr;
        }

        //发送字符信息到服务端的方法
        public void ClientSendMsg(string sendMsg)
        {
            //将输入的内容字符串转换为机器可以识别的字节数组   
            byte[] arrClientSendMsg = Encoding.UTF8.GetBytes(sendMsg);
            //调用客户端套接字发送字节数组   
            socket.Send(arrClientSendMsg);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace TcpIpClint
{
    class Program
    {
        static void Main(string[] args)
        {
            TcpIpClintEx tcpIpClintEx = new TcpIpClintEx("192.168.3.39",10000);

            while (true)
            {
                string strSend = Console.ReadLine();
                if (strSend == "exit") break;
                tcpIpClintEx.ClientSendMsg(strSend);
            }
        }
    }
}

客户端代码

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

namespace TcpIpServer
{
    class TcpIpServerEx
    {
        public EndPoint RemoteEndPoint { get; private set; } //当前客户端的网络结点

        Thread threadwatch = null;//负责监听客户端的线程
        Socket socket = null;//负责监听客户端的套接字
        // Dictionary<ip和端口, Socket> 定义一个集合，存储客户端信息
        public Dictionary<EndPoint, Socket> dic = new Dictionary<EndPoint, Socket> { };

        private StringBuilder msg = new StringBuilder();
        public string Msg
        {
            get { return msg.ToString(); }
            private set
            {
                msg.AppendLine(value);
                Console.WriteLine(value + "\r\n");
            }

        }

        private TcpIpServerEx() { }
        public TcpIpServerEx(int port = 11000)
        {
            //定义一个套接字用于监听客户端发来的消息，包含三个参数（IP4寻址协议，流式连接，Tcp协议）
            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            //将IP地址和端口号绑定到网络节点point上
            //IPEndPoint point = new IPEndPoint(IPAddress.Any, port);//设置服务器端口，IP是本程序所在PC的内网IP
            IPEndPoint point = new IPEndPoint(IPAddress.Parse("127.0.0.1"),port);//单机测试使用

            //监听绑定的网络节点
            socket.Bind(point);

            //将套接字的监听队列长度限制为20
            socket.Listen(20);

            //创建一个监听线程
            threadwatch = new Thread(watchconnecting);

            //将窗体线程设置为与后台同步，随着主线程结束而结束
            threadwatch.IsBackground = true;

            //启动线程   
            threadwatch.Start();

            //启动线程后显示相应提示
            Msg = ("开始监听客户端传来的信息!" + "\r\n");
        }

        //监听客户端发来的请求
        private void watchconnecting()
        {
            Socket connection = null;
            while (true)  //持续不断监听客户端发来的请求   
            {
                try
                {
                    connection = socket.Accept();
                }
                catch (Exception ex)
                {
                    Msg = (ex.Message); //提示套接字监听异常   
                    break;
                }

                //让客户显示"连接成功的"的信息
                string sendmsg = "连接服务端成功！你的IP是" + connection.RemoteEndPoint;
                byte[] arrSendMsg = Encoding.UTF8.GetBytes(sendmsg);
                connection.Send(arrSendMsg);


                RemoteEndPoint = connection.RemoteEndPoint; //客户端网络结点号
                Msg = ("成功与" + RemoteEndPoint + "客户端建立连接！\t\n");     //显示与客户端连接情况
                dic.Add(RemoteEndPoint, connection);    //添加客户端信息


                //创建一个通信线程    
                ParameterizedThreadStart pts = new ParameterizedThreadStart(recv);
                Thread thread = new Thread(pts);
                thread.IsBackground = true;//设置为后台线程，随着主线程退出而退出           
                thread.Start(connection);//启动线程  
            }
        }

        ///   
        /// 接收客户端发来的信息    
        ///   
        ///客户端套接字对象  
        private void recv(object socketclientpara)
        {

            Socket socketServer = socketclientpara as Socket;
            while (true)
            {
                //创建一个内存缓冲区 其大小为1024*1024字节  即1M   
                byte[] arrServerRecMsg = new byte[1024 * 1024];
                //将接收到的信息存入到内存缓冲区,并返回其字节数组的长度  
                try
                {
                    int length = socketServer.Receive(arrServerRecMsg);

                    //将机器接受到的字节数组转换为人可以读懂的字符串   
                    string strSRecMsg = Encoding.UTF8.GetString(arrServerRecMsg, 0, length);

                    //将发送的字符串信息附加到文本框txtMsg上   
                  
                        Msg = ("客户端:" + GetCurrentTime() + socketServer.RemoteEndPoint + "的消息:" + strSRecMsg + "\r\n");
              
                }
                catch (Exception ex)
                {
                    Msg = ("客户端:" + GetCurrentTime() + socketServer.RemoteEndPoint + "已经中断连接" + "\r\n"); //提示套接字监听异常 
                    //listBoxOnlineList.Items.Remove(socketServer.RemoteEndPoint.ToString());//从listbox中移除断开连接的客户端
                    socketServer.Close();//关闭之前accept出来的和客户端进行通信的套接字
                    break;
                }
            }


        }


        //获取当前系统时间
        private string GetCurrentTime()
        {
            string timeStr = System.DateTime.Now.ToString("yyyy年MM月dd日hh时mm分ss秒fff毫秒。");
            return timeStr;
        }

        /// <summary>
        /// 发送信息到客户端
        /// </summary>
        /// <param name="smallname"></param>
        /// <param name="sendMsg">要发送的信息</param>
        public void SentMsg(EndPoint endPoint, string sendMsg)
        {
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(sendMsg);   //将要发送的信息转化为字节数组，因为Socket发送数据时是以字节的形式发送的
            dic[endPoint].Send(bytes);   //发送数据
            Msg = (GetCurrentTime() + endPoint + "的消息:" + sendMsg + "\r\n");
        }
    }
}

using System;
namespace TcpIpServer
{
    class Program
    {
        static void Main(string[] args)
        {
            TcpIpServerEx s = new TcpIpServerEx();
            while (true)
            {
                string strSend = Console.ReadLine();
                if (strSend == "exit") break;
                Console.WriteLine("s.dic.Count:" + s.dic.Count);
                if (s.dic.Count > 0)
                {
                    s.SentMsg(s.RemoteEndPoint, strSend);
                }
            }
        }
    }
}