在C#中实现接口事件的具体示例

using System;

public interface IEventPublisher
{
    // 定义事件
    event EventHandler<DataReceivedEventArgs> DataReceived;
}

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

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

public class EventPublisher : IEventPublisher
{
    // 实现接口事件
    public event EventHandler<DataReceivedEventArgs> DataReceived;

    // 触发事件的方法
    protected virtual void OnDataReceived(DataReceivedEventArgs e)
    {
        DataReceived?.Invoke(this, e);
    }

    public void SimulateDataReception(string data)
    {
        // 触发事件
        OnDataReceived(new DataReceivedEventArgs(data));
    }
}

public class EventSubscriber
{
    public void Subscribe(IEventPublisher publisher)
    {
        publisher.DataReceived += HandleDataReceived;
    }

    private void HandleDataReceived(object sender, DataReceivedEventArgs e)
    {
        Console.WriteLine($"Data received: {e.Data}");
    }
}

class Program
{
    static void Main()
    {
        IEventPublisher publisher = new EventPublisher();
        EventSubscriber subscriber = new EventSubscriber();

        // 订阅事件
        subscriber.Subscribe(publisher);

        // 模拟数据接收，触发事件
        (publisher as EventPublisher).SimulateDataReception("Hello, world!");

        // Output: Data received: Hello, world!
    }
}