VBS Tutorial: function-IsDate Function

IsDate Function

Returns a Boolean value to indicate whether an expression can be converted to a date.

IsDate (Expression)

ExpressionA parameter can be any date or string expression that can be recognized as a date or time.

Description

If the expression is a date or can be legally converted to a valid dateIsDateFunction returnTrueOtherwise, the function returnsFalse. In Microsoft Windows, the valid date range is from January 1, 100 AD to December 31, 9999 AD. valid date ranges vary with the operating system.

The following example usesIsDateThe function determines whether the expression can be converted to a date type:

Dim MyDate, YourDate, NoDate, MyCheckMyDate = "October 19,196 2": YourDate = #10/19/62 #: NoDate = "Hello" MyCheck =IsDate (MyDate)'ReturnTrue.MyCheck =IsDate (YourDate)'ReturnTrue.MyCheck =IsDate (NoDate)'ReturnFalse.