Which class fired CollectionChanged event?

Question

I have an ObservableCollection which is manipulated by a couple of classes. I want to find out which class fired the event. I already looked at the sender object and went through the properties of the NotifyCollectionChangedEventArgs but did not find anything. I only get the reason for the event such as: Reset, Add or Remove. What I am looking for is the originator.

private void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e){
    // if coming from one class do something

    // else if coming from another class do something else
}

The purpose of this is that I need my collection to behave in a different way depending on the class that modified it.

*Why* do you want it to behave differently? There's probably a better way to accomplish what you want. — Joe White, Apr 17 '15 at 15:11
And... [This is what we call the XY Problem](http://meta.stackexchange.com/questions/66377/what-is-the-xy-problem) — Sriram Sakthivel, Apr 17 '15 at 15:16

score 2 · Answer 1 · answered Apr 17 '15 at 15:08

2

That's impossible. If you really need to do that, you can change the type of objects you put in the collection to add some sort of "owner" property, indicating who created them.

answered Apr 17 '15 at 15:08

Solal Pirelli

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Yeah i already thought of that but I will have to refactor my code quite a bit, it was more of a hope that there would be a way. I was skeptical from the start. – Venelin K Apr 17 '15 at 15:16

Which class fired CollectionChanged event?

1 Answers1