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Using the RangeValidator

As we saw in the previous section, the CompareValidator can ensure that an input maintains some relation with either a constant value or the value in another user input. However, what if we wanted to ensure that an input was between a range of values? If we were to use the CompareValidator, we'd need to use two CompareValidators, one that did a GreaterThanEqual comparison on the lower bound of the range and one that did a LessThanEqual comparison on the upper bound of the range.

If the upper and lower bounds of the range are constant values, we can use a single RangeValidator instead of two CompareValidators. For the ValidationControlTestBed.aspx ASP.NET Web page, the age input is a suitable candidate for a RangeValidator, ...