VBS TUTORIAL: function-isdate function _vbs

IsDate function

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

IsDate(expression)

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

Description

The IsDate function returns Trueif the expression is a date or can be legitimately converted to a valid date, otherwise the function returns False. Valid date range in Microsoft Windows operating system A.D. January 1, 100 to A.D. December 31, 9999; The legal date range varies depending on the operating system.

The following example uses the IsDate function to determine whether an expression can be converted to a date type:

IsDate(MyDate) ' Return  True . IsDate(YourDate) ' return  True . IsDate(NoDate) ' return  False .