Validation is testing to determine whether the user entered into the field.
After you determine that something was entered, you can then also check to see whether what was entered is a number or a character and if it is in the correct format.
Data collection on the Internet is one of its most important features, so you must make sure that the data you collect has value and meaning.
You ensure this by eliminating any chance that the information collected does not abide by the rules you outline. NET don't know the difference between client-side and server-side validation.
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.
Listing 1: Client-side Java Script for form validation This sample piece of Java Script does some validation, but it doesn't check for all the in-formation that you might need on the form you are building.By Bill Evjen Reuters December 2003 Applies to: Microsoft® ASP. NET validation server controls that are at your disposal. NET Summary: Learn how to use all the available ASP.This paper introduces these new controls and discusses tips and tricks on working with them in practical scenarios.