.NET中的弱事件？ [英] Weak events in .NET?

问题描述

如果对象A侦听来自对象B的事件，对象B将保持对象A存活。
是否有标准执行弱事件会阻止这种情况？
我知道WPF有一些机制，但我正在寻找一些不受WPF绑定的东西。
我猜测解决方案应该在某处使用弱引用。

If object A listens to an event from object B, object B will keep object A alive. Is there a standard implementation of weak events that would prevent this? I know WPF has some mechanism but I am looking for something not tied to WPF. I am guessing the solution should use weak references somewhere.

推荐答案

Dustin Campbell从DidItWith.NET博客中检查了几个尝试创建弱事件处理程序的失败尝试，然后继续显示一个有效，工作，轻量级的实现：使用弱事件处理程序解决问题。

Dustin Campbell from the DidItWith.NET blog examines several of the failed attempts to create weak event handlers, then goes on to show a valid, working, lightweight implementation: Solving the Problem With Weak Event Handlers.

但理想情况下，微软会把这个概念引入语言本身。如下所示：

Ideally, though, Microsoft would introduce the concept into the language itself. Something like:

Foo.Clicked += new weak EventHandler(...);

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