C#联合VisionPro实现TCP/IP通信详解

using System;
using System.Net;
//引入支持socket的命名空间
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace TCPIP通信 {
  public partial class Form1 : Form {
    public Form1() {
      InitializeComponent();
    }
    //声明socket需要支持的对象
    public Socket ServerSocket;//监听
    public Socket SocketAccept;//绑定客户端
    public Socket socket;//和客户端通信

    #region 开启监听
    Thread t1;//监听
    Thread t2;//接收

    //开启监听(监听的是客户端的链接)
    private void button1_Click(object sender, EventArgs e) {
      //实例化socket对象
      //参1：绑定一个ip地址，参2：数据流的格式，参3：协议
      ServerSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
      //准备ip对象绑定ip地址
      IPAddress ip = IPAddress.Parse(textBox1.Text);
      //创建端口号
      int port = Convert.ToInt32(textBox2.Text);
      //把输入的ip和端口传入到连接中，尝试链接
      IPEndPoint iPEndPoint = new IPEndPoint(ip, port);
      try {
        //开启服务器的时候很容易报错，所有做异常处理
        ServerSocket.Bind(iPEndPoint);
        //开启监听(参数是监听的数量)
        ServerSocket.Listen(5);
        //禁用按钮，避免重复监听
        button1.Enabled = false;
        //监听是持续的，所以要在分线程中进行
        t1 = new Thread(Listen);
        //设置成后台线程
        t1.IsBackground = true;
        //分线程中开始对socket监听
        t1.Start(ServerSocket);
      } catch (Exception ex) {
        MessageBox.Show(ex.Message);
      }
    }

    private void Listen(object o) {
      SocketAccept = o as Socket;
      try {
        //因为要持续监听，所以用了while循环
        while (true) {
          //阻塞线程，直到有客户端进来的时候才会往下执行
          socket = SocketAccept.Accept();
          //表示有客户端进来了，需要显示到textBox上面
          AddMsg(DateTime.Now.ToString("yyyy-mmddHHMMSS") + ":" + socket.RemoteEndPoint + "链接成功");
          //换行操作
          AddMsg("\r\n");
          //开启第二个线程，用来检测客户端传递过来的消息
          t2 = new Thread(Receive);
          t2.IsBackground = true;
          t2.Start(socket);
        }
      } catch (Exception ex) {
        MessageBox.Show(ex.Message);
      }
    }

    //接收消息的方法
    private void Receive(object obj) {
      socket = obj as Socket;
      try {
        while (true) {
          //定义字节，接收数据
          byte[] buffer = new byte[1024 * 1024 * 2];
          int r = socket.Receive(buffer);
          if (r == 0) {
            break;
          }
          string msg = Encoding.Default.GetString(buffer);
          AddMsg("他说：" + msg);
          AddMsg("\r\n");
        }
      } catch (Exception ex) {
        MessageBox.Show(ex.Message);
      }
    }

    private void AddMsg(string msg) {
      //异步处理，否则没办法刷新ui
      richText.BeginInvoke(new Action<string>(str => {
        richText.Text += msg;
      }), msg);
    }
    #endregion

    //发送消息
    private void sendBtn_Click(object sender, EventArgs e) {
      //首先获取要发送的消息
      string str = sendText.Text;
      byte[] buffer = Encoding.Default.GetBytes(str);
      try {
        socket.Send(buffer);
        AddMsg("我说：" + str);
        AddMsg("\r\n");
        sendText.Clear();
      } catch (Exception ex) {
        MessageBox.Show(ex.Message);
      }
    }

    //关闭客户端
    private void button2_Click(object sender, EventArgs e) {
      if (socket != null) {
        //禁掉socket的接收和发送
        socket.Shutdown(SocketShutdown.Both);
        socket.Close();
        t2.Abort();
      }
      ServerSocket.Close();
      SocketAccept.Close();
      t1.Abort();
      //打开监听的按钮
      button1.Enabled = true;
    }
  }
}

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

namespace _5_TCP客户端 {
  public partial class Form1 : Form {
    public Form1() {
      InitializeComponent();
    }

    //描述套字节对象
    public Socket clientSoket;
    public Socket socket;//和客户端通信
    //创建一个线程。
    Thread t1;//接收消息

    //服务器链接
    private void conecBtn_Click(object sender, EventArgs e) {
      //初始化socket对象
      clientSoket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
      //绑定IP
      IPAddress ip = IPAddress.Parse(ipTxt.Text);
      int port = Convert.ToInt32(portTxt.Text);
      //形成连接点
      IPEndPoint iPEndPoint = new IPEndPoint(ip, port);
      //尝试与远程主机链接
      try {
        clientSoket.Connect(iPEndPoint);
        AddMsg(DateTime.Now.ToString("HHmmss:") + "链接服务器");
        AddMsg("\r\n");
        conecBtn.Enabled = false;

        //开启监听
        t1 = new Thread(Receive);
        t1.IsBackground = true;
        t1.Start(clientSoket);
      } catch (Exception ex) {
        MessageBox.Show("错误消息：" + ex.Message);
      }
    }

    //封装一个显示数据的方法
    private void AddMsg(string msg) {
      textBox4.BeginInvoke(new Action<string>(str => {
        textBox4.Text += str;
      }), msg);
    }

    //封装一个接收消息的方法
    private void Receive(object o) {
      //当前聊天的对象
      Socket clientSocket = o as Socket;
      while (true) {
        try {
          //把字节转成string
          byte[] buffer = new byte[1024 * 1024 * 2];
          int r = clientSocket.Receive(buffer);
          if (r == 0) {
            break;
          }
          string msg = Encoding.Default.GetString(buffer);
          AddMsg("接收到的消息：" + msg);
          AddMsg("\r\n");
        } catch (Exception ex) {
          MessageBox.Show(ex.Message);
        }
      }
    }

    //发送消息
    private void sendMsg_Click(object sender, EventArgs e) {
      byte[] buffer = new byte[1024 * 1024 * 2];
      string str = textBox3.Text;
      //转码
      buffer = Encoding.Default.GetBytes(str);
      //发
      try {
        clientSoket.Send(buffer);
        AddMsg(str);
        AddMsg("\r\n");
        textBox3.Clear();
      } catch (Exception ex) {
        MessageBox.Show(ex.Message);
      }
    }

    //断开连接
    private void button2_Click(object sender, EventArgs e) {
      if (clientSoket != null) {
        //禁掉socket的接收和发送
        clientSoket.Shutdown(SocketShutdown.Both);
        clientSoket.Close();
        t1.Abort();
      }
      t1.Abort();
      //打开监听的按钮
      conecBtn.Enabled = true;
    }
  }
}