.net – C#中的CLI事件的C#类事件访问器

我正在从F#向C#发布一个事件：

let event = new DelegateEvent<EventHandler>()
member x.Ping() = event.Trigger([| x; EventArgs.Empty |])
[<CLIEvent>]
member x.PingEvent = event.Publish

但是,我希望在处理程序被添加或删除时运行一些代码.我认为这可以在C#中这样做：

public event EventHandler PingEvent
{
    add 
    {
        //do something
    }
    remove
    {
        //do something
    }
}

如何在F#中写上面的内容？

解决方法

在F#中,您可以使用IDelegateEvent< _>接口(或从其导出的IEvent …或IEvent,_,_>接口).所以你可以这样做：

let customEvent add remove =
  { new IDelegateEvent<_> with
        member this.AddHandler del = add del
        member this.RemoveHandler del = remove del }

type MyType() =
  let ev = customEvent (* your add handler *) (* your remove handler *)

  [<CLIEvent>]
  member this.myEvent = ev