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By Bill Evjen Reuters December 2003 Applies to: Microsoft® ASP. NET validation server controls that are at your disposal.

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Validating, in this case, does not mean that if John Doe types his name into the form field of a text box as Fred Doe the computer sends an alert to inform you that the data is untruthful.No, we still do not have the capability to find out whether a statement is true.From there, you can compare user input in different fields or against values that might be held in other repositories, such as a database.You can check for many types of information, as you learn in the rest of this article.This takes care of the problem of making unnecessary trips to the server, but it requires another language to learn and manage.

Java Script is a great language, but takes a lot of time to master, and there are always problems getting your Java Script code to work on different browsers.It was a lot easier to understand the difference between these forms of validation when you coded Active Server Pages 3.0 because, as the programmer, you personally performed almost all data validation.You yourself either programmed it to be client-side or server-side.This piece of code determines only whether the user entered anything at all in all five fields within the form.It does not determine whether the user entered an actual e-mail address within the e-mail address text box, whether the user entered a number between two given numbers, or whether the password and the confirm password text boxes match.If the data is incorrect or not valid, you can send back a response stating this.