小第做一套client/server的程序:

server开启,监听localhost的4321端口,client启动后填写主机IP进行连接,之后进行输入,在服务端显示

问题是:只有IP打127.0.0.1或者localhost的时候才可以成功连接,如果打机器的真实IP连接不了,高手可以告诉我为什么吗?? 两个文件的代码如下:

net_server.cs

程序代码：

using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
//using System.Threading;
public class net_server
{

 public static void Main()

 {    
  try
  {
   Int32 port = 4321;
   
   IPAddress localAddr = Dns.Resolve(\"localhost\").AddressList[0];
   TcpListener server = new TcpListener(localAddr, port);
   server.Start();
       
   Byte[] bytes = new Byte[256];
   String data = null;
   while(true) 
   {
    Console.WriteLine(\"服务程序正在监听。。。\");
    TcpClient client = server.AcceptTcpClient();
    Console.WriteLine(\"成功建立连接。。。\");
    data = null;
    NetworkStream stream = client.GetStream();
    Int32 i;
    while((i = stream.Read(bytes, 0, bytes.Length))!=0) 
    { 
     data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
     Console.WriteLine(String.Format(\"Received: {0}\", data));  
    }
    client.Close();
   }
  }
  catch(SocketException e)
  {
   Console.WriteLine(\"SocketException: {0}\", e);
  }
  
  Console.WriteLine(\"\nHit enter to continue...\");
  Console.Read();

 }
}

net_client.cs

程序代码：

using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
//using System.Threading;
public class net_client
{

 public static void Main(string[] args)

 {
  string host;
  Int32 port = 4321;
  if(args.Length<=0)
  {
   Console.Write(\"请输入主机IP地址：\");
   host=Console.ReadLine();
  }
  else
  {
   host=args[0];
  }
  
  //IPAddress server = IPAddress.Parse(host);
  
  //IPEndPoint ipEP=new IPEndPoint(server,port);

 
  try
  {
   TcpClient client = new TcpClient(host,port); 
   NetworkStream stream = client.GetStream();
   Byte[] data = new Byte[256];
  
   string senddata; 
   while(true)
   {
    senddata=Console.ReadLine();
    data = System.Text.Encoding.ASCII.GetBytes(senddata);
    stream.Write(data,0,data.Length);
   } 
  
  
   client.Close();
  } 
  catch (ArgumentNullException e) 
  {
   Console.WriteLine(\"ArgumentNullException: {0}\", e);
  } 
  catch (SocketException e) 
  {
   Console.WriteLine(\"SocketException: {0}\", e);
  }
  catch (Exception e ) 
  { 
   Console.WriteLine(e.ToString()); 
  } 
    
  Console.WriteLine(\"\n Press Enter to continue...\");
  Console.Read();

 }
}

期待回答!!!不胜感激!

知道了一点,IP那里原来要添自己的真实IP,但是又有新问题了!!!

在c#中怎么可以动态获得自己的IP,假如多网卡又如何啊?

版主,求助!!!!!

斑竹向广大的人民求助！！！！！！！！！

（斑竹是个站在门口的家伙，呵呵）

还请各位多多帮忙！