c sharp 中的客户端网络和服务器网络

Question

我和我的朋友目前正尝试在 visual studio 中使用 c sharp 构建一个聊天应用程序。在这样做的时候，我们遇到了 "client network" 和 "server network" 这两个词。我被告知这是两个 dll 文件，它们提供了我的客户端、服务器和数据库之间的连接。任何人都可以向我解释这些 dll 文件应该包含什么以及它们如何为我们的聊天应用程序做出贡献（我还是个初学者）非常感谢！

Answer 1

根据你的描述，你想解决客户端与服务端的通信问题。推荐大家使用socket实现server和client的连接，

创建两个DLL文件，方便程序引用。

下面会详细说明

(1) ClientCommunication.dll

1：建立Socket对象；

2：使用socket对象的Connect()方法以上面创建的EndPoint对象为参数向服务器发送连接请求；

3：如果连接成功，使用socket对象的Send()方法向服务器发送信息；

4：使用socket对象的Receive()方法接收服务器发送的信息；

5：通信结束后一定要关闭socket

(2) ServerCommunication.dll

1：建立Socket对象；

2：用socket对象的Bind()方法绑定EndPoint；

3：使用socket对象的Listen()方法开始监听；

4：接受客户端的连接，使用socket对象的Accept()方法创建一个新的socket对象，用于与请求客户端通信；

5：使用新的socket对象接收和发送消息。

ServerCommunication.dll 包含 ServerSocket.cs ServerSocket.cs代码：

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

namespace ServerCommunication
{
   public class ServerSocket
    {
        static Socket serverSocket;
        public static void StartListening(IPAddress ip, int port) 
        {

            serverSocket = new Socket(SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint point = new IPEndPoint(ip, port);
            serverSocket.Bind(point);
            Console.WriteLine("{0}Listen Success", serverSocket.LocalEndPoint.ToString());
            serverSocket.Listen(10);
            Thread myThread = new Thread(ListenClientConnect);
            myThread.Start();
            Console.ReadLine();


        }
         static void ListenClientConnect()
        {
            while (true)
            {
                Socket clientSocket = serverSocket.Accept();
                clientSocket.Send(Encoding.ASCII.GetBytes("Server Say Hello"));
                Thread receiveThread = new Thread(ReceiveMessage);
                receiveThread.Start(clientSocket);
            }
        }
        static void ReceiveMessage(object clientSocket)
        {
            Socket myClientSocket = (Socket)clientSocket;
            while (true)
            {

                try
                {
                    //clientSocket accept
                    byte[] result = new byte[1024];
                    int receiveNumber = myClientSocket.Receive(result);
                    Console.WriteLine("Receive client{0}news{1}", myClientSocket.RemoteEndPoint.ToString(), Encoding.ASCII.GetString(result, 0, receiveNumber));
            }
                catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                myClientSocket.Shutdown(SocketShutdown.Both);
                myClientSocket.Close();
                break;
            }
        }
        }
}
}

ClientCommunication.dll 包含 ClientSocket.cs ClientSocket.cs代码：

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

namespace ClientCommunication
{
   public class ClientSocket
    {
       static byte[] result = new byte[1024];
        public static void StartClient(IPAddress ip, int port)
        {

            Socket socketClient = new Socket(SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint point = new IPEndPoint(ip, port);

            try
            {
                socketClient.Connect(point);
                Console.WriteLine("Successfully connected to server!");
            }
            catch
            {
                Console.WriteLine("Failed to connect to the server, please press enter to exit!");
                return;
            }
            //clientSocket accept 
            int receiveLength =   socketClient.Receive(result);

            Console.WriteLine("Receive server message:{0}", Encoding.ASCII.GetString(result, 0, receiveLength));

            // clientSocket send        
            try
            {
                    Thread.Sleep(1000);    
                    string sendMessage = "client send Message Hellp" + DateTime.Now;
                    socketClient.Send(Encoding.ASCII.GetBytes(sendMessage));
                    Console.WriteLine("Send message to server:{0}" + sendMessage);
                }
                catch
                {
                    socketClient.Shutdown(SocketShutdown.Both);
                    socketClient.Close();                  
                }

            Console.WriteLine("After sending, press enter to exit");
            Console.ReadLine();   

        }
}
}

具体使用如下：

服务器，cs码：

using ServerCommunication;
using System.Net;

namespace Server
{
    class Server
    {
        static void Main(string[] args)
        {
            IPAddress ip = IPAddress.Parse("127.0.0.1");           
            int port = 8885;
            ServerSocket.StartListening(ip,port);
        }
    }
}

Client.cs代码：

using ClientCommunication;
using System.Net;

namespace Client
{
    class Client
    {
        static void Main(string[] args)
        {
            IPAddress ip = IPAddress.Parse("127.0.0.1");
            int port = 8885;
            ClientSocket.StartClient(ip,port);

        }
    }
}

运算结果：

服务器：

客户：

c sharp 中的客户端网络和服务器网络

Client network and server network in c sharp

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