在 C# 中实现套接字侦听器的最佳方法 [英] Best way to implement socket listener in C#

问题描述

我已经搜索了答案，但找不到任何类似的东西...

I did search for answers already, but can't find anything similar...

我对 C# 还很陌生.我需要使用 WinForms 在 C# 中创建一个程序.它基本上有 2 个组件:UI，然后我需要一个进程来永久侦听套接字 TCP 端口.如果收到任何信息，那么我需要引发一个事件或类似事件，以便我可以更新 UI.

I'm fairly new to C#. I need to create a program in C# using WinForms. It basically has 2 components: UI and then I need to have a process that permanently listens on a socket TCP port. If there's anything received, then I need to raise an event or something similar so I can update the UI.

问题:实现需要在程序运行时一直监听的进程的最佳方法是什么?

Question: what is the best way to implement a process that needs to be listening all the time while the program is running?

然后，当我收到消息时，如何通知 UI 需要更新?

And then, when I receive a message, how can I notify the UI that it needs to be updated?

谢谢！

推荐答案

您可以使用 TcpListener 等待另一个线程上的传入连接.每次收到新连接时，创建一个新线程来处理它.使用 Control.Invoke 从非 UI 线程更新 UI.这是一个简短的例子:

You can use a TcpListener that waits for incoming connections on another thread. Every time you receive a new connection, create a new thread to process it. Use Control.Invoke to update the UI from the non-UI thread. Here's a short example :

public MainForm()
{
    InitializeComponents();
    StartListener();
}

private TcpListener _listener;
private Thread _listenerThread;

private void StartListener()
{
    _listenerThread = new Thread(RunListener);
    _listenerThread.Start();
}

private void RunListener()
{
    _listener = new TcpListener(IPAddress.Any, 8080);
    _listener.Start();
    while(true)
    {
        TcpClient client = _listener.AcceptTcpClient();
        this.Invoke(
            new Action(
                () =>
                {
                    textBoxLog.Text += string.Format("\nNew connection from {0}", client.Client.RemoteEndPoint);
                }
            ));;
        ThreadPool.QueueUserWorkItem(ProcessClient, client);
    }
}

private void ProcessClient(object state)
{
    TcpClient client = state as TcpClient;
    // Do something with client
    // ...
}

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