24 - ASP.NET RegularExpressionValidator Control

This is used to compare a value in a form field to a regular expression. You can use it to check email address, postal codes, website address, social security number or any string patterns that you know how it is formatted. You can get regular expressions from the internet to use with this control. Regular expression are not easy to write but they can be very powerful if you master them, there are many websites on the internet with ready-made regular expression that you can plugin into your web application...