event_learn\Program.cs
| |
| public class MyEventArgs : EventArgs |
| { |
| |
| public DateTime? EmitDate { get; set; } |
| } |
| |
| |
| |
| public class Publisher |
| { |
| |
| public event EventHandler<MyEventArgs>? MyEvent; |
| |
| |
| protected virtual void OnMyEvent(DateTime date) |
| { |
| |
| if (MyEvent == null) return; |
| |
| |
| MyEvent(this, new MyEventArgs { EmitDate = date }); |
| } |
| |
| |
| public void DoSomething() |
| { |
| |
| var publishDate = DateTime.Now; |
| Console.WriteLine($"Publisher {publishDate}"); |
| |
| |
| OnMyEvent(publishDate); |
| } |
| } |
| |
| |
| public class Subscriber |
| { |
| |
| public void HandleEvent(object sender, MyEventArgs e) |
| { |
| |
| Console.WriteLine($"Subscriber:{e.EmitDate} "); |
| } |
| } |
| |
| class Program |
| { |
| static void Main(string[] args) |
| { |
| |
| Publisher publisher = new Publisher(); |
| |
| Subscriber subscriber = new Subscriber(); |
| |
| publisher.MyEvent += subscriber.HandleEvent!; |
| |
| publisher.DoSomething(); |
| |
| } |
| } |
| |
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