I have created a form that the user needs to enter a zip code. I need a required validator to let the user know they must enter a zip into the field. I am not sure how to do this and make it validate that the zip code they entered is an actual zip code. I don't want them to just be able to enter "11111" or "12345" into the field just to be able to move onto the next field. Can someone please help.
I need help with validating a zip code in asp.net c# code?
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