What are ASP.NET Validation controls?-tech17032012

ASP.NET provides validation controls to help you check Web form data entries before the data is accepted and saved in the Database. Validation controls can be used to address the following questions. 1. Did the user enter anything? 2. Is the entry the appropriate kind of data (For example, Date of Birth should be a valid Date, Name should be a string etc.)? 3. Is the data within a required range?(For example age cannot be greater than 100 years) The validation controls check the validity of data entered in associated server controls on the client before the page is posted back to the server.Most validity problems can be caught and corrected by the user without a round-trip to the server.