C#中利用事件来传递数据(EventArgs)

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猴君
阅读量:2

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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