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我正在从主应用程序运行 C# 服务器,我想将从服务器线程接收到的消息传递给主线程。服务器应该在后台运行以进行新连接。每次有新连接时,服务器都应将收到的消息传递给主应用程序。收到消息时如何让主应用知道?当有新连接时,如何将消息从服​​务器线程传递到主线程?

主要应用

  public partial class MainWindow : Window
 {
        TCPServer Server = new TCPServer(); //start running the server
        //get the message (Server.message) when a client sent it to the server
        //TODO process the message
    }

TCP 服务器

class TCPServer
    {
        private TcpListener tcpListener;
        private Thread listenThread;
        private String message;

        public TCPServer()
    {
        this.tcpListener = new TcpListener(IPAddress.Any, 3200);
        this.listenThread = new Thread(new ThreadStart(ListenForClients));
        this.listenThread.Start();

    }

 //starts the tcp listener and accept connections
    private void ListenForClients()
    {
        this.tcpListener.Start();

        while (true)
        {
            //blocks until a client has connected to the server
            System.Diagnostics.Debug.WriteLine("Listening...");
            TcpClient client = this.tcpListener.AcceptTcpClient();
            System.Diagnostics.Debug.WriteLine("Client connected");


            //create a thread to handle communication 
            //with connected client
            Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
            clientThread.Start(client);
        }
    }


    //Read the data from the client
    private void HandleClientComm(object client)
    {

        TcpClient tcpClient = (TcpClient)client; //start the client
        NetworkStream clientStream = tcpClient.GetStream(); //get the stream of data for network access

        byte[] message = new byte[4096];
        int bytesRead;

        while (true) 
        {
            bytesRead = 0;

            try
            {
                //blocks until a client sends a message
                bytesRead = clientStream.Read(message, 0, 4096);
            }
            catch
            {
                //a socket error has occured
                break;
            }

            if (bytesRead == 0) //if we receive 0 bytes
            {
                //the client has disconnected from the server 


          break;
                }
                //message has successfully been received
                ASCIIEncoding encoder = new ASCIIEncoding();
                message = encoder.GetString(message, 0, bytesRead);

                //Reply
                byte[] buffer = encoder.GetBytes("ACK");
                clientStream.Write(buffer, 0, buffer.Length);
                System.Diagnostics.Debug.WriteLine("ACK");
                clientStream.Flush();
               }
            tcpClient.Close();
            System.Diagnostics.Debug.WriteLine("Client disconnected");
        }
4

2 回答 2

1

TcpListener 已经很好地支持了这一点,请改用 BeginAcceptTcpClient() 方法。当您从 WPF 或 Winforms 应用程序的主线程调用它时,回调将自动在同一个主线程上运行。这同样适用于它的 BeginReceive() 方法。在内部,它使用调度程序循环来激活回调方法,这与 BackgroundWorker 和 C# v5 async/await 关键字等类的工作方式非常相似。

这使您免于终止自己的线程并确保您正确编组返回的麻烦。并显着减少程序的资源使用。强烈推荐。

于 2013-05-08T23:44:19.897 回答
0

一个队列就是答案。特别是在这种情况下是Concurrent Queue

您的套接字线程将消息放入队列中。您的工作线程轮询队列并拉出工作项。

对于基于套接字的应用程序,这种模式非常非常普遍。

或者,您可以针对系统线程池使用QueueUserWorkItem,并让它管理工作负载。

注意:您现在处于多线程领域。您需要阅读有关同步和其他将要出现的问题。不这样做意味着您的应用程序将有非常奇怪的错误。

于 2013-05-08T23:47:52.373 回答