C# Server Event in abgeleiteter Klasse

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Wenn ich einen TCP Server in C# habe und ein Event OnClientConnect haben will das man überschreiben kann wenn man einen Server abgeleitet hat, wie mache ich das?

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

public class SimpleTCPServer
{

    private TcpListener listener;

    public SimpleTCPServer()
    {

        listener = new TcpListener(IPAddress.Any, 1234);
        
    }

    public void StartServer()
    {

        listener.Start();

        while (true)
        {

            TcpClient client = listener.AcceptTcpClient();
            Thread clientThread = new Thread(HandleClient);
            clientThread.Start(client);

        }

    }

    static void HandleClient(object obj)
    {

        TcpClient tcpClient = (TcpClient)obj;

        NetworkStream clientStream = tcpClient.GetStream();
        byte[] message = new byte[4096];
        int bytesRead;

        while (true)
        {
            bytesRead = 0;

            try
            {
                bytesRead = clientStream.Read(message, 0, 4096);
            }
            catch
            {
                break;
            }

            if (bytesRead == 0)
                break;

            string clientMessage = Encoding.ASCII.GetString(message, 0, bytesRead);
            Console.WriteLine($"Received: {clientMessage}");

            byte[] response = Encoding.ASCII.GetBytes("Server received your message");
            clientStream.Write(response, 0, response.Length);
            clientStream.Flush();

        }

        tcpClient.Close();

    }

}
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1 Antwort

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Mit C# Events kannst du Klassen zu einem bestimmten Zeitpunkt über ein Geschehen in deiner Anwendung benachrichtigen und Daten übersenden.

public class SimpleTCPServer
{

    private TcpListener listener;

    public SimpleTCPServer()
    {

        listener = new TcpListener(IPAddress.Any, 1234);
        
    }

    public void StartServer()
    {

        listener.Start();

        while (true)
        {

            TcpClient client = listener.AcceptTcpClient();
            Thread clientThread = new Thread(HandleClient);
            clientThread.Start(client);

            OnClientConnect(client);

        }

    }

    static void HandleClient(object obj)
    {

        TcpClient tcpClient = (TcpClient)obj;

        NetworkStream clientStream = tcpClient.GetStream();
        byte[] message = new byte[4096];
        int bytesRead;

        while (true)
        {
            bytesRead = 0;

            try
            {
                bytesRead = clientStream.Read(message, 0, 4096);
            }
            catch
            {
                break;
            }

            if (bytesRead == 0)
                break;

            string clientMessage = Encoding.ASCII.GetString(message, 0, bytesRead);
            Console.WriteLine($"Received: {clientMessage}");

            byte[] response = Encoding.ASCII.GetBytes("Server received your message");
            clientStream.Write(response, 0, response.Length);
            clientStream.Flush();

        }

        tcpClient.Close();

    }

    protected virtual void OnClientConnect(TcpClient client)
    {
        ClientConnect?.Invoke(client);
    }

    public event Action<TcpClient> ClientConnect;

}

In der abgeleiteten Klasse kannst du das Event dann überschreiben.

class MyApp
{

    SimpleTCPServer srv;

    public void Main()
    {
        srv = new SimpleTCPServer();
        srv.ClientConnect += OnClientConnect;
        srv.StartServer();
    }

    public virtual void OnClientConnect(TcpClient client)
    {
        // ...
    }

}
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