Question

I have created a TextBox dynamically and attached a Tap event handler to it using:

control.Tap += new EventHandler<System.Windows.Input.GestureEventArgs>(OnClick1);

It works fine. But, now I want to change the event handler to point to some different method. I tried:

control.Tap += new EventHandler<System.Windows.Input.GestureEventArgs>(OnClick2);

但是,它仍然指向第一事件手。 i.e. OnClick1。我可以做些什么来说明? 还有一种办法可以完全消除这一活动。

Answer 1

You need to remove the first handler first:

control.Tap -= OnClick1;
control.Tap += OnClick2;

(说明更简单地使用方法组别转换,而不是明确制造活动手。) 这样做是一样的,但可以读得更多。