C#基于Sockets类如何实现TCP通讯

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具体内容如下

最终效果

TCPClient

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

namespace TCPClient02
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Socket socketSend;
        private void button1_Click(object sender, EventArgs e)
        {
            //Create socket
            socketSend = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPAddress ip = IPAddress.Parse(textBox1.Text);
            IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(textBox2.Text));
            IDInfo idinfo = new IDInfo();  //Read ID number information
            //Get the IP address and port number of the remote server
            socketSend.Connect(point);
            ShowMessages("Connection succeeded");

            //Start a new thread and keep receiving messages sent by the server
            Thread th = new Thread(ReciveMessages);
            th.IsBackground = true;
            th.Start();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string str = textBox3.Text.Trim();
            byte[] buffer = System.Text.Encoding.UTF8.GetBytes(str);
            socketSend.Send(buffer);
        }


        void ShowMessages(string str)
        {
            textBox4.AppendText(str + "\r\n");
        }
        void ReciveMessages()
        {
            while (true)
            {
                byte[] buffer = new byte[1024 * 1024 * 3];
                int r = socketSend.Receive(buffer);
                if (r == 0)
                {
                    break;
                }
                string s = Encoding.UTF8.GetString(buffer, 0, r);
                ShowMessages(socketSend.RemoteEndPoint + ":" + s);
            }
        }

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

TCPserver

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

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

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                //创建一个负责监听的Socket
                Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                //创建ip地址和端口号
                //IPAddress ip = IPAddress.Parse(textBox1.Text);
                IPAddress ip = IPAddress.Any;
                IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(textBox2.Text));
                //让负责监听的socket绑定ip地址和端口号
                socketWatch.Bind(point);

                ShowMsg("监听成功");
                //设置监听队列（某一时刻连接客户端的最大数目）
                socketWatch.Listen(10);

                //线程执行的方法
                Thread th = new Thread(Listen);   //服务器开始监听
                th.IsBackground = true;
                th.Start(socketWatch);

            }
            catch
            {

            }


        }

        void ShowMsg(string str)
        {
            textBox3.AppendText(str + "\r\n");

        }

        /// <summary>
        /// 等待客户端的连接 并且创建与之通信的Socket
        /// </summary>
        /// 
        Socket socketSend;
        void Listen(object o)
        {
            Socket socketWatch = o as Socket;
            //负责监听的socket 来接收客户端的连接  
            //创建跟客户端通信的socket

            while (true)
            {
                try
                {
                    socketSend = socketWatch.Accept();
                    ShowMsg(socketSend.RemoteEndPoint.ToString() + "连接成功");
                    //开始一个新的线程不断接受客户端发送过来的消息
                    Thread th = new Thread(Recive);
                    th.IsBackground = true;
                    th.Start(socketSend);
                }
                catch
                {

                }


            }

        }
        /// <summary>
        /// 服务器不断接受客户端发送过来的消息
        /// </summary>
        /// <param name="o"></param>
        void Recive(object o)
        {
            

            Socket socketSend = o as Socket;
            while (true)
            {
               try
                {
                    //客户端连接成功后，服务器应该接收客户端发来的消息
                    byte[] buffer = new byte[1024 * 1024 * 2];
                    //实际接收到的有效字节数
                    int bytelen = socketSend.Receive(buffer);
                    if (bytelen == 0)
                    {
                        break;

                    }
                    string str = Encoding.UTF8.GetString(buffer, 0, bytelen);
                    ShowMsg(socketSend.RemoteEndPoint + ":" + str);
                }
                catch
                {  }
                
                

            }

        }


        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

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

       /// <summary>
       /// 服务器给客户端发送消息
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            string str = textBox4.Text;
            byte[] buffer = System.Text.Encoding.UTF8.GetBytes(str);
            socketSend.Send(buffer);

        }
    }
}

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