C#之Socket(套接字)通信

private void btnListen_Click(object sender, EventArgs e)
{
    IPEndPoint point = new IPEndPoint(IPAddress.Any, 13000);//IPAddress.Any本机任何网卡IP。本机端口查看netstat -an
    //服务端Socket定义
    Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    socket.Bind(point); //绑定IP
    socket.Listen(10);//启动监听。最大监听数,同一个时间点过来10个客户端，排队
    ShowMsg("服务器开始监听");

    Thread thread = new Thread(AcceptInfo);
    thread.Start(socket);

}

//记录通信用的Socket
Dictionary<string, Socket> dic = new Dictionary<string, Socket>();

// private Socket client;
void AcceptInfo(object o)
{
    Socket socket = o as Socket;
    while (true)
    {
        //通信用socket
        try
        {
            Socket clientSocket = socket.Accept();//如果客户端有请求，生成一个新的Socket
            string point = clientSocket.RemoteEndPoint.ToString();
            ShowMsg(point + "连接客户端成功！");
            dic.Add(point, clientSocket);
            //接收消息
            Thread th = new Thread(ReceiveMsg);
            th.Start(clientSocket);
        }
        catch (Exception ex)
        {
            break;
        }
    }
    socket.Close();
}
//接收消息
void ReceiveMsg(object socket)
{
    Socket clientSocket = socket as Socket;
    while (true)
    {
        //接收客户端发送过来的数据
        try
        {
            //定义byte数组存放从客户端接收过来的数据
            byte[] buffer = new byte[1024 * 1024];
            
           int n = clientSocket.Receive(buffer);//将接收过来的数据放到buffer中，并返回实际接受数据的长度

            //将字节转换成字符串
            string words = Encoding.Unicode.GetString(buffer, 0, n);
            Console.WriteLine(clientSocket.RemoteEndPoint.ToString() + ":" + words);
            byte[] msg = Encoding.Unicode.GetBytes(words);
            clientSocket.Send(msg);//发送数据，字节数组
        }
        catch (Exception ex)
        {
            break;
        }
    }
    clientSocket.Shutdown(SocketShutdown.Both);//禁止发送和接受数据
    clientSocket.Close();//关闭socket,释放资源
}

Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint point = new IPEndPoint("127.0.0.1", 13000));//连接到的服务端IP
clientSocket.Connect(point);//连接到服务器
ShowMsg("连接成功");
ShowMsg("服务器" + client.RemoteEndPoint.ToString());
ShowMsg("客户端:" + client.LocalEndPoint.ToString());
Thread th = new Thread(ReceiveMsg);//连接成功后，就可以接收服务器发送的信息了
th.IsBackground = true;
th.Start();

clientSocket.Shutdown(SocketShutdown.Both);//禁止发送和接受数据
clientSocket.Close();//关闭socket,释放资源