close all forms-main and sub

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i have this problem.. i want to know if there is way that the program will detect if the user clicks the close (X button on the upper right of the window) ? say on the sub form

then the program will close the main form and all the other sub forms....

pls.. help..

Thanks...

Posted 2-Jul-11 21:01pm

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OriginalGriff · Accepted Answer · 2011-07-02T21:10:00

Solution 1

Easy - add a handler to the sub form FormClosed event when you construct it (and before you use the Show function).
In the handler, close the current form.

[edit]Forgot the Form part of FormClosed... - OriginalGriff[/edit]

Posted 2-Jul-11 21:10pm

OriginalGriff

Updated 2-Jul-11 21:11pm

v2

Comments

Sergey Alexandrovich Kryukov 3-Jul-11 3:28am

Did you mean "FormClosing" as you can cancel, check up the reason, etc.? "FormClosed" can be too late.
Please see my solution.
--SA

OriginalGriff 3-Jul-11 3:34am

Normally, I would handle the Closed event - leave the reasons and any cancellation to the sub form, as it knows what it is doing when the user decided to close it.

Sergey Alexandrovich Kryukov 3-Jul-11 3:44am

Anyway, I mentioned both events because either of them or both might be really needed.
--SA

Sergey Alexandrovich Kryukov · Accepted Answer · 2011-07-02T21:27:00

You need to override the method System.Windows.Forms.OnFormClosing. You may cancel closing the form my assigning true the the property Cancel of event arguments parameter. You can get the same effect by handling the event System.Windows.Forms.FormClosing. You can also check the closing reason passed in the same argument and act accordingly.

The event System.Windows.Forms.FormClosed will "detect" it, too, but this is too late to change or cancel — the form will be closed anyway.

—SA

Simon_Whale · Accepted Answer · 2011-07-02T22:58:00

Solution 3

I would use the my.application.openforms

on the form close events call a rountine that uses the my.application.openforms

Openforms[^]

you will need to enumerate that form collection but remember to the active form last.

this way you can also perform any save / delete functions that you want before the form is closed.

Posted 2-Jul-11 22:58pm

Simon_Whale

Updated 2-Jul-11 23:04pm

v2

Comments

Sergey Alexandrovich Kryukov 3-Jul-11 12:31pm

You can use it of course, but this is not an event; you're not getting a notification. The question was how to detect. If you detect closing window, you already have what you need.
--SA

Simon_Whale 3-Jul-11 14:22pm

Good point that was omitted the form closed and closing events. But I did assume that with the first and second answers that the OP would of realised to use those events to start the process that he is after

Sergey Alexandrovich Kryukov 3-Jul-11 16:38pm

Understood.
--SA