Eman Fawzy Abduallah

Validation controls type : RequiredFieldValidator Ensures that the user does not skip an entry :CompareValidator Compares a user's entry against a constant value : RangeValidator Checks that a user's entry is between specified lower and upper boundaries RegularExpressionValidator Checks that the entry matches a pattern defined by a regular expression CustomValidator Checks the user's entry using validation logic that you write yourself.