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Tabpage knowing when the Parent Form is closing?

I have a tabpage within a form that I need information to be saved before people can close out of it.

The problem I am having is that the while the user can fill out the form I cannot prevent them from hitting the X in the top right corner and losing the data they have saved.

So how would I capture his OnClose event from within a tabpage?
1 Solution
Assuming this is a windows forms project, it's incorrect to say 'from within the tabPage' because it does not have it's own code; the code is contained in the parent form.
To prevent/ask the user to save first, handle the FormClosing event of the form. Then you can do something like the code below, of course you can elaborate with a dialog asking the user to save, as is customary.

  void Form1_FormClosing(object sender, FormClosingEventArgs e)
    if (!saved) e.Cancel = true; //cancel closing

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Anurag ThakurTechnical ManagerCommented:
lot of links for how to handle your requirement in web forms
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