Set / Clear and restore control event handlers

[Lloyd Sheen]

Is there a way to get the event handlers such that I can cache the info
about handlers for a particular control, remove the handlers, do some code
and restore the cached event handlers in VB.NET (2008).

I would rather do things this way than having to have a boolean flag to
indicated to the handler to exit right away.

Psuedo code:

CacheHandlers(control)

code which would cause the control to fire an event.

RestoreHandlers(control).

LS

 

[Stephany Young]

RemoveHandler ....
...

code which would cause the control to fire an event.

AddHandler ....
...

 

[Lloyd Sheen]

RemoveHandler ....
...

code which would cause the control to fire an event.

AddHandler ....
...

Yes I know about the "norm" but what I am looking at doing is for a control
(any control) to have a way of removing and then after some code restoring
the event handlers. I am looking for a general method which would take into
account that I would not know what to use for Addhandler and RemoveHandler
so I am looking for a method to enumerate the "added" handlers and then
cache the info, do a remove and when asked reset using AddHandler.

LS

 

[Cor Ligthert[MVP]]

Lloyd,

You will need reflection for what you want, however in my idea are you going
in the wrong direction.

Cor

 

[Michel Posseth [MCP]]

Seems pretty easy if this is what you are looking for


http://msdn.microsoft.com/en-us/library/system.delegate.getinvocationlist.aspx


MyEventEvent.GetInvocationList()


HTH

Michel Posseth

 

[Lloyd Sheen]

Seems pretty easy if this is what you are looking for


http://msdn.microsoft.com/en-us/library/system.delegate.getinvocationlist.aspx


MyEventEvent.GetInvocationList()


HTH

Michel Posseth

Thanks but I would like to go from the other direction. I would like to get
a list of the eventhandlers (not eventinfo) for a control which would allow
me to remove the handlers from certain events and add them after I execute
some code. Is that at all possible?

I notice that Control thru the base class Component has a Events property.
This unfortunately is protected so I cannot get the list from here. I want
to start a control not at delegate since I might not know the delegate(s).

Thanks
LS