0Control to validate an error message. Are common feature in all the controls.
Various validators are requiredfeild validator ,compare validator ,regular expression validator,custom validator,range validator and validation summary.
1. Required field validator asks for the missing field in server side controls like textboxes dropdowlistot list box or checkboxlist and tells to populate in the form of error message.
2. Compare validator asks for two textboxes or familiar controls to have the exact match of the data types ore expressions.
3. Regular expression validator asks for correct format of email passwords and phone numbers or website address.
4. The custom validator does the same what regular expression validator does additionally it can customize its own features of validation by language coding means.
5.Validation summary. Display list of error messages in the form of bullet list on the top of the registration page etc.
6. Range validator checks whether the data types entered is falling in the correct ranges. Example values between two integer or dates or strings or float currencies etc..
