c#socket接收数据传送事件示例

在C#中，Socket编程通常用于网络通信，包括接收和发送数据。这里是一个简单的例子，展示了如何使用TcpClient和MulticastDelegate来监听接收到的数据并触发一个事件：

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

public class SocketReceiver
{
    public event EventHandler<DataReceivedEventArgs> DataReceived; // 定义事件

    private TcpListener listener = new TcpListener(IPAddress.Any, 8080); // 创建监听器

    public void StartListening()
    {
        listener.Start(); // 启动监听
        Console.WriteLine("Listening for incoming connections...");

        // 当有新连接时，开始接收数据并触发事件
        listener.BeginAcceptTcpClient(AcceptCallback, null);
    }

    private void AcceptCallback(IAsyncResult ar)
    {
        try
        {
            TcpClient client = listener.EndAccept(ar); // 接受连接
            NetworkStream stream = client.GetStream(); // 获取流

            byte[] buffer = new byte[4096]; // 定义缓冲区
            int bytesRead = stream.Read(buffer, 0, buffer.Length); // 接收数据

            if (bytesRead > 0)
            {
                string receivedData = Encoding.ASCII.GetString(buffer, 0, bytesRead); // 解码数据
                Console.WriteLine($"Received data: {receivedData}");

                // 触发事件，通知所有订阅者数据已接收
                DataReceived?.Invoke(this, new DataReceivedEventArgs(receivedData));
            }
            else
            {
                Console.WriteLine("Connection closed.");
                client.Close();
            }

            listener.BeginAcceptTcpClient(AcceptCallback, null); // 继续监听新的连接
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Error: {ex.Message}");
        }
    }
}

public class DataReceivedEventArgs : EventArgs
{
    public string Data { get; set; }

    public DataReceivedEventArgs(string data)
    {
        Data = data;
    }
}

// 在主程序中使用事件
class Program
{
    static void Main()
    {
        SocketReceiver receiver = new SocketReceiver();
        receiver.DataReceived += OnDataReceived; // 订阅事件

        receiver.StartListening();
        Console.ReadLine(); // 等待输入以保持控制台窗口打开
    }

    private static void OnDataReceived(object sender, DataReceivedEventArgs e)
    {
        Console.WriteLine($"Event triggered! Received: {e.Data}");
    }
}

当你运行这个程序时，它会监听8080端口，并在接收到数据时触发`DataReceived`事件。主程序中的`OnDataReceived`方法会在事件发生时被调用。