如何创建一个接受并可以区分两个客户端的c#程序？答案

【问题标题】：How to create a c# Program that Accepts and can distinguish between two clients?如何创建一个接受并可以区分两个客户端的c#程序？
【发布时间】：2013-11-07 14:31:52
【问题描述】：

我正在编写一个可以接受两个客户端的程序，但为它们创建了两个不同的对象，因为它们以两种不同的方式与服务器通信。我如何编辑这个现有的程序，它可以首先区分它是什么客户端，然后将它分配给适当的类。

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;

class MyTcpListener
{
  public static void Main()
  { 
    TcpListener server=null;   
    try
    {
      // Set the TcpListener on port 13000.
      Int32 port = 13000;
      IPAddress localAddr = IPAddress.Parse("127.0.0.1");
      // TcpListener server = new TcpListener(port);
      server = new TcpListener(localAddr, port);

      // Start listening for client requests.
      server.Start();

      // Buffer for reading data
      Byte[] bytes = new Byte[256];
      String data = null;

      // Enter the listening loop. 
      while(true) 
      {
         Console.Write("Waiting for a connection... ");

        // Perform a blocking call to accept requests. 
        // You could also user server.AcceptSocket() here.
        TcpClient client = server.AcceptTcpClient();            
        Console.WriteLine("Connected!");

        data = null;
        // Get a stream object for reading and writing
        NetworkStream stream = client.GetStream();

        int i;

        // Loop to receive all the data sent by the client. 
        while((i = stream.Read(bytes, 0, bytes.Length))!=0) 
        {   
          // Translate data bytes to a ASCII string.
          data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
          Console.WriteLine("Received: {0}", data);

          // Process the data sent by the client.
          data = data.ToUpper();

          byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);

          // Send back a response.
          stream.Write(msg, 0, msg.Length);
          Console.WriteLine("Sent: {0}", data);            
        }

        // Shutdown and end connection
        client.Close();
      }
    }
    catch(SocketException e)
    {
      Console.WriteLine("SocketException: {0}", e);
    }
    finally
    {
       // Stop listening for new clients.
       server.Stop();
    }


    Console.WriteLine("\nHit enter to continue...");
    Console.Read();
  }   
}

【问题讨论】：

我会推荐客户端在握手的前面附加一个标头来标识它是客户端的类型。 IE。客户端发送的第一个字节 = 0 或 1，具体取决于客户端的类型。

标签： c# sockets tcplistener

【解决方案1】：

假设这些是不同客户端的客户端类。

public class ClientClassA : IClientInstance
{
}

public class ClientClassB : IClientInstance
{
}

使用单例模式

public interface IClientInstance
{
}

public static class ClientInstance
{
    public enum ClientTypes
    {
        ClientTypeA,
        ClientTypeB
    };

public static ClientInstance Create(ClientTypes ofClientType)
{
    IClientInstance clientObject = null;
    switch (ofClientType)
    {
        case ClientInstance.ClientTypes.ClientTypeA:
            clientObject = new ClientClassA() as ClientInstance;
        default:
            break;
    }

    return clientObject;
}
}

【讨论】：