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C#中利用事件来传递数据(EventArgs)

c#
小亿
162
2024-01-02 19:01:25
栏目: 编程语言

在C#中,可以通过事件来传递数据,其中EventArgs类用于封装事件参数。下面是一个简单的示例:

首先,定义一个包含事件的类:

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

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

public class DataPublisher
{
    public event EventHandler<DataEventArgs> DataPublished;

    public void PublishData(string data)
    {
        OnDataPublished(new DataEventArgs(data));
    }

    protected virtual void OnDataPublished(DataEventArgs e)
    {
        DataPublished?.Invoke(this, e);
    }
}

然后,创建一个订阅者类来处理事件:

public class DataSubscriber
{
    public void Subscribe(DataPublisher publisher)
    {
        publisher.DataPublished += Publisher_DataPublished;
    }

    private void Publisher_DataPublished(object sender, DataEventArgs e)
    {
        Console.WriteLine("Received data: " + e.Data);
    }
}

最后,在主程序中使用这些类:

public class Program
{
    public static void Main(string[] args)
    {
        DataPublisher publisher = new DataPublisher();
        DataSubscriber subscriber = new DataSubscriber();
        subscriber.Subscribe(publisher);

        publisher.PublishData("Hello, World!");

        Console.ReadLine();
    }
}

当调用publisher.PublishData("Hello, World!")时,事件将被触发,然后订阅者类中的Publisher_DataPublished方法将被执行,并打印出接收到的数据。

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