本文介绍了分配 null 是否会从对象中删除所有事件处理程序?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在班级中定义了新成员
I have defined new member in my class
protected COMObject.Call call_ = null;这个类有以下我订阅的事件处理程序
This class has the following event handler that I subscribed to
call_.Destructed += new COMObject.DestructedEventHandler(CallDestructedEvent);将我的成员设置为 null 如下删除事件处理程序?
Will setting my member to null as following remove the event handler?
call_ = null;或者我必须使用 -= 取消订阅?
or I have to unsubscribed with -=?
推荐答案是的,你应该使用重载的 -= 来取消订阅一个事件.
yes, you should use overloaded -= to unsubscribe an event.
简单地分配对 null 的引用不会自动执行此操作.该对象仍将监听该事件.
simply assigning a reference to null will not do that automatically. The object will still be listening to that event.
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分配 null 是否会从对象中删除所有事件处理程序?
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