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7.8

Find all Delegates Pointed to a Function Without Envent Raiser Reference

Asked by Lacutah in Microsoft Visual Basic.Net

Tags: all, collection, delegates, handler, object

Take the following example (foobar could be any type of object that exposes an event I want to handle...):
sub DoThis()
   dim i as integer = 0
   dim o as FooBarObject
   for i = 0 to 5
       o = new FooBarObject(...)
       AddHandler o.SomeEvent, addressof FooBarEventHappened
    next
end sub

sub FooBarEventHappened()
       ...
end sub

End Result: I've created 6 new foobar objects that will cause FooBarEventHappened to run.  I have not maintained any obvious references to the 6 foobar objects I created - there is no collection or array object containing a reference to the objects for later use.  The CLR however knows not to garbage collect my foobar objects because there is an event handler for their events.

How can I now get a reference to each of the foobar objects created based on the fact that FooBarEventHappened is registered to handle the event?

[+][-]02/23/05 08:14 AM, ID: 13383762Accepted Solution

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About this solution

Zone: Microsoft Visual Basic.Net
Tags: all, collection, delegates, handler, object
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Solution Provided By: gregoryyoung
Participating Experts: 4
Solution Grade: A
 
[+][-]02/17/05 03:50 PM, ID: 13341010Expert Comment

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