使用反射取消订阅活动 [英] Using reflection to unsubscribe an event

问题描述

我有一个我正在使用的库，它有一个失效的监听器问题。我认为我只是潜入并且自己做取消订阅，因为我不希望它很快就会修复

。


所以，我有控制其订阅的事件，它已经订阅了

的VisibleChanged事件，并且有一个名为

的事件处理程序ControlVisibleChanged。


基本上，我想做的是：


myControl.VisibleChanged - = new

EventHandler（myControl.ControlVisibleChanged）;


问题是myControl.ControlVisibleChanged是私有的。


那么，我将什么传递给EventHandler构造函数？


谢谢

解决方案

>问题是myControl.ControlVisibleChanged是私有的。

>
那么，我将什么传递给EventHandler构造函数？

如果你拥有正确的权限，你也可以使用Reflection获得一个用于

私有方法的MethodInfo。请确保在检索时包含

BindingFlags.NonPublic。

Mattias


-

Mattias Sj？gren [C＃MVP] mattias @ mvps.org
http：/ /www.msjogren.net/dotnet/ | http://www.dotnetinterop.com

请回复到新闻组。

" Mattias Sj？gren" < ma ******************** @ mvps.orgwrote in message

news：％2 ********* ******* @ TK2MSFTNGP02.phx.gbl ...

问题是myControl.ControlVisibleChanged是私有的。

那么，我将什么传递给EventHandler构造函数？

如果您拥有正确的权限，您也可以使用Reflection获得一个用于

私有方法的MethodInfo。请确保在检索时包含

BindingFlags.NonPublic。


Mattias

I可以得到MethodInfo，但是我不能将MethodInfo传递给新的

EventHandler（），因为它不需要方法信息。它通常需要

方法本身，我当然需要以某种方式传递与方法相关的类实例

。

8月31日下午1:33，pedrito < pixbypedrito at yahoo.comwrote：

我可以获得MethodInfo，但我不能将MethodInfo传递给新的

EventHandler （）因为它不需要方法信息。它通常需要

方法本身，我当然需要以某种方式传递与该方法关联的类实例

。

Delegate.CreateDelegate你追求的是什么？


Jon

I have a library I''m using that has a lapsed listener issue. I figured I''d
just sneak in and do the unsubscription myself since I don''t expect it to be
fixed any time soon.

So, I have the control whose event its subscribed to and it''s subscribed to
the VisibleChanged event and has an event handler called
ControlVisibleChanged.

So basically, what I want to do is:

myControl.VisibleChanged -= new
EventHandler(myControl.ControlVisibleChanged);

The problem is myControl.ControlVisibleChanged is private.

So, what do I pass to the EventHandler constructor?

Thanks

解决方案

>The problem is myControl.ControlVisibleChanged is private.

>
So, what do I pass to the EventHandler constructor?

If you hav the right permissions you can get a MethodInfo for a
private method with Reflection as well. Just make sure you include
BindingFlags.NonPublic when retrieving it.
Mattias

--
Mattias Sj?gren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

"Mattias Sj?gren" <ma********************@mvps.orgwrote in message
news:%2****************@TK2MSFTNGP02.phx.gbl...

The problem is myControl.ControlVisibleChanged is private.

So, what do I pass to the EventHandler constructor?

If you hav the right permissions you can get a MethodInfo for a
private method with Reflection as well. Just make sure you include
BindingFlags.NonPublic when retrieving it.
Mattias

I can get the MethodInfo, but I can''t pass the MethodInfo to new
EventHandler() because it doesn''t take a method info. It normally takes the
method itself and I certainly need to pass the class instance associated
with the method, somehow.

On Aug 31, 1:33 pm, "pedrito" <pixbypedrito at yahoo.comwrote:

I can get the MethodInfo, but I can''t pass the MethodInfo to new
EventHandler() because it doesn''t take a method info. It normally takes the
method itself and I certainly need to pass the class instance associated
with the method, somehow.

Is Delegate.CreateDelegate what you''re after?

Jon

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