The following code example uses the derived class Text Box and validates an e-mail address that the user enters.
If the e-mail address is not in the standard format (containing "@" and "."), the validation fails, an Error Provider icon is displayed, and the event is canceled.
Your program can be if this information is not received in a timely manner.
You will not be able to apply for a Social Security card if you have not contacted us to provide this information.
You can find more information about applying for a Social Security Number here.I've read something about Validating Events, but I am not sure how can I use them. Validating Event When you change the focus by using the keyboard (TAB, SHIFT TAB, and so on), by calling the Select or Select Next Control methods, or by setting the Container Control.Active Control property to the current form, focus events occur in the following order Enter Got Focus Leave Validating Validated Lost Focus When you change the focus by using the mouse or by calling the Focus method, focus events occur in the following order: Enter Got Focus Lost Focus Leave Validating Validated event provides the hook to perform the validation and Error Provider gives a nice consistent approach to providing the user with feedback on any error conditions.This example requires that a Text Box and Error Provider control have been created on a form.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.
Doing so can cause your application or the operating system to stop responding.