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Validating event c

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This will future proof your code as much as possible and prepare you for any breaking changes down the road to the internals of the Framework. In that case you should also somehow tell the user that there’s a problem with the field. For example, if the user presses Tab, clicks on another control, presses Enter to trigger the Accept button, or presses Esc to trigger the Cancel button.Is there a simple way of triggering validating/validated event on the button? I tried placing textbox on the form and tabbing between button and textbox, but neither of those events get triggered.I want to check what the user is writing in a textbox before I save it in a database. I guess I can always write some ifs or some try-catch blocks, but I was wondering if there's a better method.This might be a common scenario in data entry forms where you might create a new record and the user might not touch all the fields on your form (and thus never trigger the “Validating” event of your controls). One, pointed out by Chris Sells (read more), invokes the Control's “Notify Validating” event through Reflection.Here is an example: You can also trigger the Validation event by giving focus to a control and taking the focus away.MSDN doesn't have validated/validating listed in their documentation.

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For example, you might want to have a routine that fires on the form's “Closing” event or a data save method to loop through all the controls on your form and validate them independently to ensure that all controls are valid.

This is fine if your only concerned about the data that is entered being correct.

But this doesn't work well if you're trying to make sure a user didn't leave a textbox empty by skipping over it.

For example, you could display an error message, change the field’s background color, or at least beep to let the user know that focus did not leave the field because something is wrong. The event triggers even if the user tries to close the form.

That means the user cannot close the form unless the field passes validation.