Validating asp net server controls
The client side validation routine should be written in a scripting language, such as Java Script or VBScript, which the browser can understand.
Validation is important part of any web application.
User's input must always be validated before sending across different layers of the application.
The validation control classes are inherited from the Base Validator class hence they inherit its properties and methods.
Therefore, it would help to take a look at the properties and the methods of this base class, which are common for all the validation controls: The Regular Expression Validator allows validating the input text by matching against a pattern of a regular expression.