C windows form validating event


11-Oct-2016 17:08

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When you use the Error Provider, you only need to add one to your form.

It maintains a mapping of error messages associated to each control in the form.

There is a deep discussion about when, where and how this validation should be done.

Should this validation be done on the client-side or the server-side in a client/side application?

If you set an error message for a control, then an error icon is shown next to the control and will also display a tooltip when you hover the mouse over the error icon.

You set the error message for a control by calling the Set Error method on the error provider instance.

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Data-bound controls raise events when validation occurs, giving the opportunity to write validation logic.As well as the Error Provider component notifies the user of any validation problems.



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