Socket通信（一）

1、服务器端：

一般编写服务器端的流程：

先创建Socket-->调用BInd绑定ip地址和端口号---->调用Listen等待客户端连接---->在while死循环中调用Accept接收客户端的连接，并回应消息

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace Socket_Test
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("你好，这边是服务器端");

            Socket sockets = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPAddress ipaddress = IPAddress.Parse("127.0.0.1");
            IPEndPoint ipendPoint = new IPEndPoint(ipaddress, 1234);

            sockets.Bind(ipendPoint);           //切记，一定要进行Bind
            sockets.Listen(100);         //限定监听100个客户端

            Console.WriteLine("服务器开始监听");

            while (true)
            {
                Socket connfd = sockets.Accept();        //监听的是客户端的信息

                //revc
                Console.WriteLine("服务器开始接收信息");
                byte[] buffer = new byte[1024];
                int connfdLength = connfd.Receive(buffer);          //接收到信息，然后得出信息的长度
                string connfdString =System.Text.Encoding.UTF8.GetString(buffer, 0, connfdLength);
                Console.WriteLine("接收到信息"+connfdString);

                //send:

                string sendString = DateTime.Now.ToString();   //把当前的时间进行传递
                byte[] sendByte = System.Text.Encoding.Default.GetBytes(sendString);
            }
        }
    }
}

 2、客户端：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;

//客户端
namespace Socket_Client
{
    class Program
    {

        private Socket socket;
        private string ipAddress = "127.0.0.1";     //IP地址
        private int port = 1234;                    //端口号

        private const int buffer_Size = 1024;       //一次的接收大小
        byte[] readBuffer = new byte[buffer_Size];          //用来接收数据的数组


        private void Connetion()
        {
            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);           //建立套接字

            //connect
            socket.Connect(ipAddress, port);

            //send:
            string Send_str = "Unity";
            byte[] bytes = System.Text.Encoding.Default.GetBytes(Send_str);
            socket.Send(bytes);

            //recv:
            int count = socket.Receive(readBuffer);
            string Recv_str = System.Text.Encoding.UTF8.GetString(readBuffer, 0, count);
            Console.WriteLine("客户端接收到信息："+Recv_str);

            //close:关闭连接;
            socket.Close();

        }

        static void Main(string[] args)
        {
            Program p = new Program();
            p.Connetion();
        }
    }
}