How do I unsubscribe from a MDIchild form's event.

Question

I've an MDI form that responds to a few events in its children.  When they close, how do I unsubscribe to their events, and where do I put this code (in the parent or in the child)?  Also, when the MDIparent closes, how do I unsubscribe to all their events (I'll put that in the parent's close() event)?

The line used to subscribe to the child forms' events is:

frmLocation loc = new frmLocation();

loc.MdiParent = this;

loc.Show();

loc.QuoteDetailsUpdated += new frmLocation.QuoteDetailUpdated(ManageChangedDetails);

Thanks!

Answer 1

First, you'll also want to handle the loc's FormClosing event with a handler.  In that event handler is where you'll unsubscribe:

loc.QuoteDetailsUpdated -= ManageChangedDetails;
loc.FormClosing -= loc_FormClosing;

---

Coding Light - Illuminated Ideas and Algorithms in Software
Coding Light Wiki • LinkedIn • ForumsBrowser

Answer 2

So to unsubscribe from the childs' events, I have to subscribe to another event?  That's just wrong.  I'll try it out and see what's up.

Answer 3

It's not wrong. You actually want to unsubscribe when something happens. Typical use of events.

Answer 4

Yeah.  I mean "wrong" as in "Doesn't seem it should work that way".  Not "wrong" as in "not correct". 

Thanks.