简单socket通讯

[c#]代码库

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

namespace MyWeiChert
{
    public partial class 服务端 : Form
    {
        public 服务端()
        {
            InitializeComponent();
            //关闭对文本框的非法线程操作检查
            TextBox.CheckForIllegalCrossThreadCalls = false;
        }
        Thread threadWatch = null; //负责监听客户端的线程
        Socket socketWatch = null; //负责监听客户端的套接字

        private void btnServerConn_Click(object sender, EventArgs e)
        {
            try
            {
                //定义一个套接字用于监听客户端发来的信息  包含3个参数(IP4寻址协议,流式连接,TCP协议)
                socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                //服务端发送信息 需要1个IP地址和端口号
                IPAddress ipaddress = IPAddress.Parse(txtIP.Text.Trim()); //获取文本框输入的IP地址
                                                                          //将IP地址和端口号绑定到网络节点endpoint上 
                IPEndPoint endpoint = new IPEndPoint(ipaddress, int.Parse(txtPORT.Text.Trim())); //获取文本框上输入的端口号
                                                                                                 //监听绑定的网络节点
                socketWatch.Bind(endpoint);
                //将套接字的监听队列长度限制为20
                socketWatch.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
                threadWatch.IsBackground = true;
                //启动线程
                threadWatch.Start();
                //启动线程后 txtMsg文本框显示相应提示
                txtMsg.AppendText("开始监听客户端传来的信息!" + "\r\n");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                throw;
            }

        }

        //创建一个负责和客户端通信的套接字 
        Socket socConnection = null;

        /// <summary>
        /// 监听客户端发来的请求
        /// </summary>
        private void WatchConnecting()
        {
            while (true)  //持续不断监听客户端发来的请求
            {
                socConnection = socketWatch.Accept();
                txtMsg.AppendText("客户端连接成功" + "\r\n");
                //创建一个通信线程 
                ParameterizedThreadStart pts = new ParameterizedThreadStart(ServerRecMsg);
                Thread thr = new Thread(pts);
                thr.IsBackground = true;
                //启动线程
                thr.Start(socConnection);
            }
        }

        /// <summary>
        /// 发送信息到客户端的方法
        /// </summary>
        /// <param name="sendMsg">发送的字符串信息</param>
        private bool ServerSendMsg(string sendMsg)
        {
            try
            {
                //将输入的字符串转换成 机器可以识别的字节数组
                byte[] arrSendMsg = Encoding.UTF8.GetBytes(sendMsg);
                //向客户端发送字节数组信息
                socConnection.Send(arrSendMsg);
                //将发送的字符串信息附加到文本框txtMsg上
                txtMsg.AppendText("服务端:" + GetCurrentTime() + "\r\n" + sendMsg + "\r\n");
                return true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                return false;
            }
        }

        /// <summary>
        /// 接收客户端发来的信息 
        /// </summary>
        /// <param name="socketClientPara">客户端套接字对象</param>
        private void ServerRecMsg(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
                int length = socketServer.Receive(arrServerRecMsg);
                Dingding.Ding();
                //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  
                txtMsg.AppendText("客户端:" + GetCurrentTime() + "\r\n" + strSRecMsg + "\r\n");
            }
        }
        //发送信息到客户端
        private void btnSendMsg_Click(object sender, EventArgs e)
        {
            //调用 ServerSendMsg方法  发送信息到客户端
            if (ServerSendMsg(txtSendMsg.Text.Trim()))
            {
                txtSendMsg.Text = "";
            }
        }

        //快捷键 Enter 发送信息
        private void txtSendMsg_KeyDown(object sender, KeyEventArgs e)
        {
            //如果用户按下了Enter键
            if (e.KeyCode == Keys.Enter)
            {
                //则调用 服务器向客户端发送信息的方法
                if (ServerSendMsg(txtSendMsg.Text.Trim()))
                {
                    txtSendMsg.Text = "";
                }
            }
        }

        /// <summary>
        /// 获取当前系统时间的方法
        /// </summary>
        /// <returns>当前时间</returns>
        private DateTime GetCurrentTime()
        {
            DateTime currentTime = new DateTime();
            currentTime = DateTime.Now;
            return currentTime;
        }
    }
}

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