TCP/IP 通信

1:服务器端

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.Sockets;
using System.Net;// 包含IPAddress与IPEndPoint类
using System.Threading;
namespace MyChatRoomServer
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false;
        }
        Thread watchThread = null;
        Socket watchSocket = null;
        Thread connectThread = null;
        private void button1_Click(object sender, EventArgs e)
        {
             //声明监听套接字  参数(使用IP4的寻址协议，使用流式连接，使用Tcp数据传输协议)
            watchSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //绑定端口
            IPAddress ipAddress = IPAddress.Parse(this.textBox1.Text.Trim());
            //创建包含ip和port的网络节点对象
            IPEndPoint ipEndpoint = new IPEndPoint(ipAddress, int.Parse(this.textBox2.Text.Trim()));
            //将监听的队列绑定到唯一的ip和端口上
            watchSocket.Bind(ipEndpoint);
            //设置监听队列的长度
            watchSocket.Listen(10);
            watchThread = new Thread(watchConnection);
            watchThread.IsBackground = true;
            watchThread.Start();
            showMsg("服务端监听成功!");
        }
        Dictionary<string, Socket> dict = new Dictionary<string, Socket>();
        Dictionary<string, Thread> dict1 = new Dictionary<string, Thread>();
        void watchConnection()
        {
            while (true)//持续不断的进行监听
            {
                //会阻塞线程
                Socket connectSocket = watchSocket.Accept();
                dict.Add(connectSocket.RemoteEndPoint.ToString(), connectSocket);
                listBox1.Items.Add(connectSocket.RemoteEndPoint.ToString());
                showMsg("客户端连接成功！ ");
                ParameterizedThreadStart td=new ParameterizedThreadStart(chart);
                Thread td1 = new Thread(td);
                dict1.Add(connectSocket.RemoteEndPoint.ToString(),td1);
                td1.Start(connectSocket);

            }
        }
        private void showMsg(string message)
        {
            this.txtMsg.AppendText(message+ "\r\n");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string strMsg = this.txtMsgSend.Text.Trim();
            byte[] arrMsg = System.Text.Encoding.UTF8.GetBytes(strMsg);
            dict[listBox1.Text].Send(arrMsg);
            showMsg("你已发送了：" + strMsg);
        }

        private void txtMsgSend_TextChanged(object sender, EventArgs e)
        {

        }
        void chart(object socketPara)
        {
            Socket socket = socketPara as Socket;
            while (true)
            {
                byte[] arrMsgRec = new byte[1024 * 1024 * 2];
                int length = socket.Receive(arrMsgRec);
                string myMessage = System.Text.Encoding.UTF8.GetString(arrMsgRec, 0, length);
                showMsg(myMessage);
            }
        }
    }
}

2：客户端通信

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 MychatClient
{
    public partial class FChatClient : Form
    {
        public FChatClient()
        {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false;
        }
        Socket connectSocket = null;
        Thread connectThread = null;
        private void button1_Click(object sender, EventArgs e)
        {
            IPAddress ipAddress = IPAddress.Parse(this.textBox1.Text.Trim());
            IPEndPoint ipEndpoint = new IPEndPoint(ipAddress, int.Parse(this.textBox2.Text.Trim()));
            connectSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            connectSocket.Connect(ipEndpoint);
            connectThread = new Thread(chart);
            connectThread.IsBackground = true;
            connectThread.Start();
        }

        void chart()
        {
            while (true)
            {
                byte[] arrMsgRec = new byte[1024 * 1024 * 2];
                int length = connectSocket.Receive(arrMsgRec);
                string myMessage = System.Text.Encoding.UTF8.GetString(arrMsgRec, 0, length);
                showMsg(myMessage);
            }
        }
        private void showMsg(string message)
        {
            this.txtMsg.AppendText(message + "\r\n");
        }

        private void button2_Click(object sender, EventArgs e)
        {

        }

        private void button2_Click_1(object sender, EventArgs e)
        {
            string strMsg = this.txtMsgSend.Text.Trim();
            byte[] arrMsg = System.Text.Encoding.UTF8.GetBytes(strMsg);
            connectSocket.Send(arrMsg);
            showMsg("你已发送了：" + strMsg);
        }
    }
}