event_learn\MyEvent.cs
| |
| namespace MyEvent; |
| |
| |
| public delegate void MyEventHandler(object sender, EventArgs e); |
| |
| |
| |
| public interface IMyEvent |
| { |
| |
| event MyEventHandler MyEvent; |
| } |
event_learn\Program.cs
| |
| using MyEvent; |
| |
| public class MyPublisher : IMyEvent |
| { |
| |
| public event MyEventHandler? MyEvent; |
| |
| |
| protected virtual void OnMyEvent() |
| { |
| |
| MyEvent?.Invoke(this, EventArgs.Empty); |
| } |
| |
| |
| public void DoSomething() |
| { |
| |
| Console.WriteLine("Publisher: do something ... "); |
| |
| OnMyEvent(); |
| } |
| |
| } |
| |
| |
| |
| public class Subscriber |
| { |
| |
| public void HandleEvent(object sender, EventArgs e) |
| { |
| |
| Console.WriteLine($"Subscriber: receive some thing , {e} "); |
| } |
| } |
| |
| |
| class Program |
| { |
| static void Main() |
| { |
| var publisher = new MyPublisher(); |
| var subscriber = new Subscriber(); |
| publisher.MyEvent += subscriber.HandleEvent!; |
| publisher.DoSomething(); |
| |
| } |
| } |
| |
| |
| |
| |
| |
| |
| |
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