How to prevent MDI main form closing from MDI Child.

Posted by Rekreativc on Stack Overflow See other posts from Stack Overflow or by Rekreativc
Published on 2010-05-10T08:24:26Z Indexed on 2010/05/10 8:54 UTC
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c#

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mdi

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formclosing

Hello!

I have a MDI main form. On it I host a form, and I want it to show a message box before it closes (asking the user whether to save changes).

So far so good, however I have discovered that closing the MDI main form does not raise a MDI child FormClosing event. I figured I will just call MdiChild.Close() in the MDI main's FormClosing event (which does get raised). This seams to work, however it does causes a problem...

In the messagebox that I show, I offer the user to save changes, not to save changes and cancel closing. Normally this works fine, however I can't seem to find a way to cancel MDI main's FormClosing event. Is there a elegant way of doing this?

EDIT: I solved this by throwing an exception (when user decides to cancel the closing procedure) which is caught in MDI main's FormClosing event. In this way I know when I have to cancel the MDI main's FormClosing event and this seams to work fine ... However I just can't believe that this "hax" is the only way of doing this. Surely there is a better way?

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