c#网络编程-聊天小程序

服务器模块

sever部分

server2.cs

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

namespace ConsoleApp8
{
    class Sever2
    {
        private Socket serverSocket;
        private List clientList;//存储连进来的客户端
        //构造函数
        public Sever2()
        {
            serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            clientList = new List();//连一个客户端往里面加一个
        }
        //启动函数
        public void Start()
        {
            serverSocket.Bind(new IPEndPoint(IPAddress.Any, 12305));
            serverSocket.Listen(10);
            Console.WriteLine("服务器启动成功!");

            Thread threadAccept = new Thread(Accept);
            threadAccept.IsBackground = true;
            threadAccept.Start();
        }
        private void Accept()
        {
            //接收客户端的方法，会挂起当前线程
            Socket client = serverSocket.Accept();
            IPEndPoint ipPoint = client.RemoteEndPoint as IPEndPoint;
            Console.WriteLine($"{ipPoint.Address} [{ipPoint.Port}]连接成功!");
            clientList.Add(client);

            Thread threadReceive = new Thread(Receive);
            threadReceive.IsBackground = true;
            threadReceive.Start(client);

            Accept();
        }
        private void Receive(object obj)
        {
            Socket client =obj as Socket;
            IPEndPoint ipPoint = client.RemoteEndPoint as IPEndPoint;
            try
            {
                byte[] msg = new byte[1024];
                int msgLen = client.Receive(msg);
                String msgStr = $"{ipPoint.Address}[{ipPoint.Port}] 说: {Encoding.UTF8.GetString(msg, 0, msgLen)}";
                Console.WriteLine(msgStr);
                Broadcast(client, msgStr);
                //服务器往客户端发消息
                //client.Send(Encoding.UTF8.GetBytes(Encoding.UTF8.GetString(msg, 0, msgLen) + "-楼上说的对"));

                Receive(client);//尾递归

            }
            catch
            {
                string catchStr = $"{ipPoint.Address}[{ipPoint.Port}]断开";
                Console.WriteLine(catchStr);
                Broadcast(client, catchStr);
                clientList.Remove(client);
            }
        }
        private void Broadcast(Socket clientOther, string msg)
        {
            foreach(var item in clientList)
            {
                if(item==clientOther)
                {
                    //同一客户端，无需响应
                }
                else
                {
                    item.Send(Encoding.UTF8.GetBytes(msg));
                }
            }
        }
    }
}

主程序部分

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp8
{
    class Program
    {
        static void Main(string[] args)
        {
            Sever2 sever2 = new Sever2();
            sever2.Start();
            Console.ReadKey();
        }
    }
}

客户端模块

client部分

ClientSocket.cs

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

namespace Client2
{
    class ClientSocket
    {
        private Socket clientSocket;
        public ClientSocket()
        {
            clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //构造函数
        }
        public void Connect(string ip, int port)
        {
            clientSocket.Connect(ip,port);
            Console.WriteLine("连接服务器成功!");

            Thread ReceiveThread = new Thread(Receive);
            ReceiveThread.IsBackground = true;
            ReceiveThread.Start();
        }
        private void Receive()
        {
            try
            {
                byte[] msg = new byte[1024];
                int msgLen = clientSocket.Receive(msg);
                Console.WriteLine($"{Encoding.UTF8.GetString(msg, 0, msgLen)}");
                Receive();
            }
            catch
            {
                Console.WriteLine("服务器断开");
            }
        }
        public void send(string msg)
        {
            clientSocket.Send(Encoding.UTF8.GetBytes(msg));
        }
    }
}

主程序部分

Program.cs

using System;

namespace Client2
{
    class Program
    {
        static void Main(string[] args)
        {
            ClientSocket client2 = new ClientSocket();
            client2.Connect("127.0.0.1", 12305);

            Console.WriteLine("请输入要发送的内容,输入quit退出");
            string msg = Console.ReadLine();
            while(msg!="quit")
            {
                client2.send(msg);
                msg = Console.ReadLine();
            }

            Console.ReadKey();
        }
    }
}

结果

Snipaste_2019-11-29_17-25-13.png