C#socket类初步了解（客户端与服务端的建立）

最新推荐文章于 2024-07-24 16:50:50 发布

原创最新推荐文章于 2024-07-24 16:50:50 发布 · 置顶 · 1.9k 阅读

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CC 4.0 BY-SA版权

文章标签：

#socket #exception #string #server #thread #byte

本文介绍了一个简单的TCP服务器和客户端通信程序实现。服务器监听特定端口并返回当前日期时间给请求的客户端，客户端则连接到服务器并接收该日期时间。

1.建立过程

服务端：

（1）建立socket

2）socket.bind(绑定ip，dns）

3）建立客户端sock（socke.accetp返回连接的客户端）；

4）通信socket.send/recieve(发送/接受客户端信息），当然还有其他信息传输方法~

5）关闭socket（服务端要实施监控，可以不用关闭

客户端：

1）建立 socket；

2）socket.conect(ip，服务器端口）//连接服务器

3）通信 socket.send/receive(还有其他方式）；

4）关闭(socket.close());

/*******************实例**********/

客户端读取服务端的的电脑显示时间

我是建立在控制台上的程序

写的不好仅供参考；

/*******************************/

DateTimeServer.sln

server.cs

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

namespace DateTimeServer
{
    class Server
    {
        static void Main(string[] args)
        {
            try
            {
                //
                String hostname = Dns.GetHostName();//获得本机域名
                IPAddress serverIp = Dns.GetHostEntry(hostname).AddressList[0];//本机ip

                //DateTimeServer port =13
                String Port = "13";//端口号设为13

                IPEndPoint serverHost = new IPEndPoint(serverIp, Int32.Parse(Port));

                Socket serverSocket = new Socket(
                    AddressFamily.InterNetwork,
                    SocketType.Stream, ProtocolType.Tcp);

                serverSocket.Bind(serverHost);

                //backlog=50;
                serverSocket.Listen(50);// 设置最大连接客户端50个

                Console.WriteLine("dateTime server started at :" +
                    serverHost.Address.ToString() + ":" + Port);

                ListenClient lc = new ListenClient(serverSocket);

                ThreadStart serverThreadStart = new ThreadStart(lc.ServerThreadPro);
                Thread serverThread = new Thread(serverThreadStart);

                serverThread.Start();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.StackTrace.ToString());
            }
            finally
            {
            }

        }
    }
}

///

ListenClient.cs

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

namespace DateTimeServer
{
    public class ListenClient
    {
        private System.Net.Sockets.Socket serverSocket;
        private System.Net.Sockets.Socket clientSocket;

        //构造函数
        public ListenClient(Socket serverSocket)
        {
            this.serverSocket = serverSocket;
        }

        public void ServerThreadPro()
        {
            while (true)
            {
                try
                {
                    clientSocket = serverSocket.Accept();

                    IPEndPoint clientInfo = (IPEndPoint)
                    clientSocket.RemoteEndPoint;//获得客户端信息
                    IPEndPoint serverIfo = (IPEndPoint)
                    serverSocket.LocalEndPoint;//获得服务端信息

                    Console.WriteLine("Client: " + clientInfo.Address.ToString() + ":" +
                        clientInfo.Port.ToString());
                    Console.WriteLine("Server:" + serverSocket.AddressFamily.ToString() + ":" +
                        serverIfo.Port.ToString());

                    String strDate = DateTime.Now.ToShortDateString() + "" +
                        DateTime.Now.ToLongTimeString();

                    byte[] byteDate =
                        Encoding.ASCII.GetBytes(strDate.ToCharArray());

                    clientSocket.Send(byteDate, 0, byteDate.Length, SocketFlags.None);//向客户端发送信息

                    Console.WriteLine("to client: " + clientInfo.Address.ToString() +
                        ":" + clientInfo.Port.ToString() + ":" + strDate);

                    clientSocket.Shutdown(SocketShutdown.Both);
                    clientSocket.Close();
                }
                catch(Exception ex){
                    Console.WriteLine(ex.StackTrace.ToString());

                    if (clientSocket.Connected)
                        clientSocket.Close();
                }
            }
        }
    }
}

客户端：

Client.cs

//using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.IO;

namespace DateTimeClient
{
    class Client
    {
        static void Main(string[] args)
        {
            try
            {
                Socket clientSocket = new Socket(AddressFamily.InterNetwork,
                    SocketType.Stream, ProtocolType.Tcp);
                IPAddress serverIp = IPAddress.Parse("172.19.82.54");
                IPEndPoint serverHost = new IPEndPoint(serverIp, Int32.Parse("13"));

                clientSocket.Connect(serverHost);

                byte[] recvByte = new byte[1024];

                int i = clientSocket.Receive(recvByte, 0, clientSocket.Available, SocketFlags.None);

                string dateTime = Encoding.ASCII.GetString(recvByte, 0, i);

                Console.WriteLine("receive{0}bytes", i);
                Console.WriteLine("current server date/Time:{0}", dateTime);

                clientSocket.Close();
                return;
            }
            catch (Exception ex)
            {
                ex.StackTrace.ToString();
                return;
            }

        }
    }
}