Validation Server Control
 
What is Validation?
 
How to Add the New Web Server Controls in Web Page?
 
A validation is a collection of rules which must be applicable on the collected data. A validation control is used to check the data at client‘s browser and these controls are also called validators.
 
Validation occurs in repose to an event, mostly button click event.
 
Validation controls in ASP.NET version 1.x greatly improved the developer's experience with adding page validation, they still lacked some important functionality.
 
ASP.NET 2.0 doesn't add any new validation controls, but it does fix the validation control shortcomings in version 1.x, along with adding additional features.