On some of your ASP.Net forms you may have fields in which visitors must enter a date and that date must fall within a specified range. For example, a birth date field would have a range that the date should fall between, as would a date on an invoice. You can use the Range Validator control to make sure the data entered by a visitor is a date within a specified range.

This technique will show you how to do that. This page displays a TextBox control, where visitor can enter the date between 1/1/1900 to 12/31/2000. If date is outside the range an error message is displayed.

The code for date validation is as follows:

Note: The things that you should take care of

• Set the ControlValidate property to the TextBox control.
• For date validation you have to set the Type property to Date. Set its range by selecting the Minimum Value and Maximum Value property.
• Set the Error Message property if the TextBox violates the rule.
• If you want to check the null strings too use the RequiredFieldValidator control.