ValidateExpression for Day,Month and Year

The code sample contains basic validation expressions generally needed in every application. Users should be allowed to enter only valid day,month and year values for a particular date.

In this code snippet uses regular expression validator and sets it's validation expression property. This example is very useful when clients don't need calender control.

ValidationExpression for Day


Day: ValidationExpression="^((([1-9]?)|([1-2][0-9])?)|([3][0-1]?))$"



ValidationExpression for Month


ValidationExpression="^((([1-9]?)|([0][1-9])?)|([1][0-2]?))$"



ValidationExpression for Year


ValidationExpression="[0-9]{4}"