Using the CompareValidator Control
The CompareValidator control enables you to perform three different types of validation tasks. You can use the CompareValidator to perform a data type check. In other words, you can use the control to determine whether a user has entered the proper type of value into a form field, such as a date in a birth date field.
You also can use the CompareValidator to compare the value entered into a form field against a fixed value. For example, if you build an auction website, you can use the CompareValidator to check whether a new minimum bid is greater than the previous minimum bid.
Finally, you can use the CompareValidator to compare the value of one form field against another. For example, you use the CompareValidator ...
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