CompareValidator
RangeValidator
RequiredFieldValidator
ValidationSummary
Answer is Right!
Answer is Wrong!
The correct answer is C. RequiredFieldValidator.
A RequiredFieldValidator is a control that validates whether a control has been filled in. It is used to verify that a control contains data.
A CompareValidator is a control that validates whether the value of a control is equal to the value of another control.
A RangeValidator is a control that validates whether the value of a control is within a specified range.
A ValidationSummary is a control that displays the results of all validation errors on a page.