C#-Socket(TCP)

//提示，线程里面不要给控件赋值


 LinkSocket.Send(result, length, 0);

自己挂起 
private void button1_Click(object sender, EventArgs e)
 {
      bool ok = guaqi(IPAddress.Parse(rip.Text) ,int.Parse (rpont .Text ));
      if (ok)
      {
             richTextBox1.Text = "挂起成功！";
             jiantingkehuduan();//监听
       }
       else richTextBox1.Text = "挂起失败";
}

连接别人
private void button2_Click(object sender, EventArgs e)
{
    bool ok = Link (IPAddress.Parse(rip.Text), int.Parse(rpont.Text));
    if (ok)
    {
       richTextBox1.Text = "连接成功！";
       clientSocket.Send(Encoding.UTF8.GetBytes("aaaaa"));
    }
    else richTextBox1.Text = "连接失败";
} 


 //CS************************************************
 //定义
 public int Pont;//端口
 public IPAddress Ip;//ip
 public Socket MySocket;//定义一个套接字

//挂起socket
public bool guaqi(IPAddress ip, int pont)
{
    try //挂起socket,可以根据这个地方try一下判断启动服务器是否成功
    {
        Pont = pont;
        Ip = ip;
        MySocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        MySocket.Bind(new IPEndPoint(Ip, Pont));
        MySocket.Listen(30);//最多监听30个
        return true;//挂起成功
    }
    catch
    {
        return false;//挂起失败
    }
}

//监听客户端
public void jiantingkehuduan()
{
      Thread myThread = new Thread(listen);
      myThread.IsBackground = true;
      myThread.Start();
}
//监听函数
public void listen()
{
      while (true)
      {
           Socket now = MySocket.Accept();//监听到的这个赋值在p1ser..上
           //每接收到一个连接就给他开一个单独的send便于交流
           Thread tt = new Thread(send);//send是接收并发送消息
           tt.IsBackground = true;
           tt.Start(now);//建立一个和p1一起的发送接受线程
       }
}
       
//send//接收和发送消息
public void send(object clientSocket)
{
     Socket nowsocket = (Socket)clientSocket;
     byte[] result = new byte[1024];
     while (true)//一直和p1保持联系
     {
          try //可以try一下，catch的时候就是对方下线或者故障了 
          {
                   
             //接收******************
             int len = nowsocket.Receive(result);//接收消息，并且存在result里
             string tmp = Encoding.UTF8.GetString(result, 0, len);
             //可以用if（tmp==""）来判断干什么 
             //发送**************
             //nowsocket.Send(Encoding.UTF8.GetBytes("aaaaa"));
           }
           catch
           {
                    return; //连接断开
           }
    }
}

//连接
Socket clientSocket;
public bool Link(IPAddress ip, int pont)
{
    clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    try
    {
        clientSocket.Connect(new IPEndPoint(ip, pont));
        //int len = clientSocket.Receive(result);
        //string tmp = Encoding.UTF8.GetString(result, 0, len);
        return true;
    }
    catch
    {
          return false;
    }
}