Question

我想创建一个客户端和服务器程序，以在彼此之间发送对象并使它工作，以便两个程序可以在两个独立的主机系统上进行通信。

在同一主机系统上运行这两个程序可以使其正常工作，但是当我尝试在两个不同的系统上运行服务器程序和客户端程序时，我只是在客户端收到超时错误。在一种奇怪的情况下，通过在我的PC上运行服务器，在我的工作笔记本电脑上运行客户端，它实际上可以工作。但是，当尝试使用另一台笔记本电脑连接到服务器时，它不起作用。当我在笔记本电脑上拥有服务器，在PC上拥有客户端时，它也将无法工作。

服务器代码：

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
namespace Controller
{
    //Class for handeling induvidual clients seperatly
    class ClientHandler 

    {
        static LinkedList<ClientHandler> allClients = new LinkedList<ClientHandler>(); //List of client handlers
        static int nextNo = 0;

        //lock used on client handler list when adding a new client handler 
        private readonly object synLock = new object();

        TcpClient MyClient; 
        string MyName; 
        NetworkStream MyStream; 

        public ClientHandler(TcpClient clientInfo)
        {
            Console.WriteLine("ClientHandler created");

            //client object for the handler
            this.MyClient = clientInfo;
            //Name of the clienthandler (to differentiate them from eachother)
            this.MyName = "Client" + nextNo.ToString();
            //Gets the stream for the client
            this.MyStream = MyClient.GetStream(); 



            //Make sure that only one thread can add clienthandler to list at a time
            lock (synLock) 
            {
                allClients.AddLast(this);
                nextNo++;

            }

            Thread clientthread = new Thread(listenandsend);
            clientthread.Start();

        }

        //Thread for reading what clients sends over stream
        public void listenandsend()  
        {
            while (true)
            {   //Buffer for recieving data
                byte[] recievedBuffer = new byte[1000]; 

                //Places data it gets from the client into the buffer
                MyStream.Read(recievedBuffer, 0, recievedBuffer.Length);

                //transform byte array to object of contest class (ref divingClassLibrary)
                divingClassLibrary.Contest c = divingClassLibrary.Contest.fromByte(recievedBuffer); 

                //Test to see if it got the right object
                Console.WriteLine("CONTEST NAME: " + c.name + ", CONTEST DATE: " + c.date);
            }
        }
    }



    class ControllerProgram
    {
        static void Main(string[] args)
        {

            //-------  --This section is used for printing out the servers own ip address---------
            string serverIP = "";

            IPAddress[] localIP = Dns.GetHostAddresses(Dns.GetHostName());

            foreach (IPAddress address in localIP)
            {
                if (address.AddressFamily == AddressFamily.InterNetwork)
                {
                    serverIP = address.ToString();
                }
            }

            Console.WriteLine(serverIP);
            //--------------------------------------------------------------------------------



            //Creates a listner for the server
            TcpListener serverListner = new TcpListener(IPAddress.Parse(serverIP), 8080); 
            TcpClient client = default(TcpClient);



            //----------------trys-catch for starting listener-----------------
            try
            {
                serverListner.Start();
                Console.WriteLine("Server started...");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                Console.Read();

            }
            //-----------------------------------------------------




            //----------------Loop for listening for clients-------------------
            while (true)
            {
                client = serverListner.AcceptTcpClient();
                Console.WriteLine("Found a clients");

                ClientHandler handle = new ClientHandler(client);

            }
            //----------------------------------------------------------------


        }


    }
}

客户代码：

using System;
using System.Text;

using System.Net;
using System.Net.Sockets;

namespace ClientProgram
{
    class client
    {
        static TcpClient serverclient; 
        static NetworkStream MyStream;


        static void Main(string[] args)
        {
            //Asks the user for the ip address of the server
            Console.WriteLine("Type in the ip address of server:");
            //Puts the ip address to a string
            string serverIP = Console.ReadLine();

            int port = 8080;

            serverclient = new TcpClient();
            //Creates the endpoint for the client 
            IPEndPoint ipEnd = new IPEndPoint(IPAddress.Parse(serverIP), port);

            //--------------Try-catch for connectng to server------------------
            try
            {
                serverclient.Connect(ipEnd);

            }

            catch(Exception ex) {
                Console.WriteLine(ex.ToString());
                Console.Read();
            }
            //-----------------------------------------------------------------


            if (serverclient.Connected)
            {
                Console.WriteLine("I got connected!");

                MyStream = serverclient.GetStream();

                //Starts the thread for listening to the server
                Thread listnerThread = new Thread(listentoserver);
                listnerThread.Start();


                while (true)
                {
                    //Asks he user for the contest name
                    Console.WriteLine("Enter Contest name: ");
                    string name = Console.ReadLine();

                    //Asks he user for the contest date
                    Console.WriteLine("Enter Contest date: ");
                    string date = Console.ReadLine();




                    //Creates an byte array by creating the contest object and converting it into bytes
                    byte[] sendData = divingClassLibrary.Contest.toByte(new divingClassLibrary.Contest(0, name, date));

                    //Sends the byte array to the server
                    MyStream.Write(sendData, 0, sendData.Length); 

                    //for ending the connection and the program (will be used later)
                    if (sendData.Equals("bye"))
                    {
                        break;
                    }

                }

                MyStream.Close();
                serverclient.Close();
            }

        }
    }
}

客户应连接并开始要求用户输入比赛的名称，然后输入比赛的日期，但我只会收到超时错误。

Answer 1

我认为问题出在您的服务器代码中。这行：

TcpListener serverListner = new TcpListener(IPAddress.Parse(serverIP), 8080);

基本上说侦听器正在等待8080，但是，您的服务器不在该端口中，我认为这就是为什么当您在同一主机上同时拥有两个代码（服务器和客户端）时的原因。

注意：如果您使用其他笔记本电脑连接这两者，则应确保您具有公用IP地址。

我的客户端程序无法连接到我的服务器程序

1 个答案: