如何获取事件的用户？ [英] How do I get the subscribers of an event?

问题描述

我需要一个事件的用户复制到另一个事件。我能得到一个事件的用户（如MyEvent [0]返回一个代表）？

I need to copy the subscribers of one event to another event. Can I get the subscribers of an event (like MyEvent[0] returning a delegate)?

如果无法做到这一点我会使用add访问向与会代表添加到列表中。请问这是最好的解决办法？

If this is not possible I would use the add accessor to add the delegates to a list. Would that be the best solution?

推荐答案

C＃事件/委托是多播，所以委托是的本身的列表。从类中，得到个人的来电，你可以使用：

C# events/delegates are multicast, so the delegate is itself a list. From within the class, to get individual callers, you can use:

if(field != null) { // or the event-name for field-like events
    // or your own event-type in place of EventHandler
    foreach(EventHandler subscriber in field.GetInvocationList())
    {
        // etc
    }
}

不过，分配全部一次，只需使用+ =或直接分配：

However, to assign all at once, just use += or direct assignment:

SomeType other = ...
other.SomeEvent += localEvent;

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