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Question

What can cause a form not to close itself? (3.update) solved

Answer 1

+1 A:

an example of how to prevent a form to be closed:

protected override void OnFormClosing(FormClosingEventArgs e)
{
    e.Cancel = true;
    base.OnFormClosing(e);
}

maybe this form is inherited and a base class prevent the form closing when some conditions are not satisfied.

Finally, if you don't achieve any solution, you can debug through the .NET Framework code and see what happens in the your form's OnClosing method.

serhio 2010-01-25 10:05:40

Thank you, but that was not what I intended whith my question, I do not need to know how I can prevent this, but how this can be accidently/unwanted prevented.

BeowulfOF 2010-01-25 10:11:22

thank you to down-vote my try to help. SEARCH in your code `Cancel = true` by e.g., dude. or inspect your OnClosing events-overrides.

serhio 2010-01-25 10:13:36

1. I'm happy about every answer.2. Did you get a message who downvoted you?3. You answer does not answer my question - so a downvote would be quite correct.

BeowulfOF 2010-01-25 10:18:19

@Beowulf, so, if a answer is not an answer you should downvote more that 90% of answers in this site.

serhio 2010-01-25 10:21:20

Doin anything just because everyone is doing so is allways wrong.

BeowulfOF 2010-01-25 10:23:59

+1 for clear example of might have been wrong. @BeowulfOF: Maybe it's time to stop breathing then? Downvoting is for bad or misleading answers, not for suggestions that didn't answer your question. Just don't mark it as accepted and go on with your life :-)

Zano 2010-01-25 11:25:22

@Zano: This answer is misleading, as I did not asked for what can I do to prevent a form from closing, but what can prevent a form of doing that.

BeowulfOF 2010-01-25 14:11:08

@BeowulfOF: You learn a lot from knowing what causes a condition or behavior, especially when you're trying to find out how to stop it. Ask any mechanic, doctor or programmer.

Zano 2010-01-25 23:27:59

Answer 2

A:

Form can be prevented from closing even from your Form_Closing event handler.

private void Form1_Closing(Object sender, CancelEventArgs e) 
{

          e.Cancel = true;

}

Check whether you're setting e.Cancel to true .. anywhere in the code which is preventing it from closing.

AB Kolan 2010-01-25 10:14:19

Answer 3

+1 A:

I think one of your 10 binding sources has an error (in one of your many databound controls) and isn't releasing you from a field somewhere. VS isn't very transparent if there are errors in databinding and problems do get silently swallowed.

Although, if this is the case:

When I click on the Close-Button (Red-Cross-Box) I goes through FormClosing and FormClosed

then that somewhat contradicts my theory.

Why not try decoupling the databinding piece by piece and seeing if you can then close the form?

hawbsl 2010-01-25 11:10:37

Good Idea, I'll try this out. I think it must be something that's got a hold on the form...

BeowulfOF 2010-01-25 11:23:33

As you can see with the StackTrace I got after demasking the failure, it is really something with databinding. Thank you for the hint.

BeowulfOF 2010-01-26 08:51:11

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What can cause a form not to close itself? (3.update) solved

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