多线程UDP客户端/服务器C＃

Question

I am trying to get a multi-threaded UDP client/server going, but i'm running into problems on the server side. When a client attempts to register, a thread is created and all the interactions for that client are handled in that thread, but for some reason it only enters the thread once then exits right away.. can anyone help figure out why this happens? -Thanks in advance..

namespace AuctionServer
{
   class Program
   {
    public static Hashtable clientsList = new Hashtable();

    static void Main(string[] args)
    {
        //IPAddress ipAd = IPAddress.Parse("255.255.255.255");
        UdpClient server = new UdpClient(8888);
        IPEndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
        string data = "";
        int listSize = 0;
        Console.WriteLine("Auction Server Started ....");
        listSize = clientsList.Count;

        while (true)
        {
            //Reads data
            byte[] inStream = server.Receive(ref remoteEndPoint);
            data = Encoding.ASCII.GetString(inStream);
            //Console.WriteLine("REGISTER " + remoteEndPoint);

            if (!data.Contains("DEREGISTER "))
            {
                byte[] sendBytes = Encoding.ASCII.GetBytes(data + remoteEndPoint.ToString());
                server.Send(sendBytes, sendBytes.Length, remoteEndPoint);
                handleClinet client = new handleClinet();
                Console.WriteLine(data);
                clientsList.Add(data, server);
                client.startClient(server, data, clientsList, remoteEndPoint);
                data = "";
            }
        }
    }

    //Broadcast method is used to send message to ALL clients
    public static void broadcast(UdpClient dest, string msg, string uName, bool flag, IPEndPoint sendEP, Hashtable clientsList)
    {
        foreach (DictionaryEntry Item in clientsList)
        {
            Byte[] broadcastBytes = null;

            if (flag == true)
            {
                broadcastBytes = Encoding.ASCII.GetBytes(msg);
            }
            else
            {
                broadcastBytes = Encoding.ASCII.GetBytes(msg);
            }
            dest.Send(broadcastBytes, broadcastBytes.Length, sendEP);

        }
    }
}//end Main class

}

namespace AuctionServer
{
public class handleClinet
{
    UdpClient clientSocket;
    string clNo;
    Hashtable clientsList;
    IPEndPoint remoteIPEndPoint = new IPEndPoint(IPAddress.Any, 0);
    IPEndPoint myEP = new IPEndPoint(IPAddress.Any, 0);

    public void startClient(UdpClient inClientSocket, string clineNo, Hashtable cList, IPEndPoint tempEP)
    {
        this.myEP = tempEP;
        this.clientSocket = inClientSocket;
        this.clNo = clineNo;
        this.clientsList = cList;
        Thread ctThread = new Thread(doChat);
        ctThread.Start();
    }

    private void doChat()
    {
        int requestCount = 0;
        byte[] bytesFrom = new byte[10025];
        string dataFromClient = null;
        string rCount = null;
        requestCount = 0;

        while ((true))
        {
            try
            {
                //Thread.Sleep(1000);
                if (requestCount == 0)
                {
                    Console.WriteLine("Thread Created");
                    requestCount++;
                }
                byte[] received = clientSocket.Receive(ref remoteIPEndPoint);
                dataFromClient = Encoding.ASCII.GetString(received);
                Console.WriteLine(dataFromClient);

                if (dataFromClient.Contains("DEREGISTER"))
                    clientSocket.Send(received, received.Length, remoteIPEndPoint);
                    //Program.broadcast(clientSocket, "DREG-CONF", clNo, true, myEP, clientsList);
                //else
                //    Program.broadcast(clientSocket, dataFromClient, clNo, true, myEP, clientsList);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                Console.ReadKey();
                break;
            }
        }//end while
    }//end doChat

}

Answer 1

The two loops run on different threads. So the loop in Main() is executing concurrently with the loop in your handleClinet class.

If you want to switch to the handleClinet class's loop and debug it, then use the Threads window in the debugger ( Debug menu, Windows menu item, then Threads ...or press Ctrl - D , T ) to switch to that thread. Then you can see the call stack and state of that thread.

Note that this may not work on the Express version of Visual Studio. I haven't tried the most recent version, but past versions did not support the Threads window. (You can still debug a specific thread by setting a breakpoint there…it's just that you can't switch to the thread manually).