IsDate

Description

Tests whether a string value is a valid date.

Syntax

IsDate ( datevalue )

Argument	Description
datevalue	A string whose value you want to test to determine whether it is a valid date

Returns

Boolean. Returns true if datevalue is a valid date and false if it is not. If datevalue is null, IsDate returns null.

Usage

You can use IsDate to test whether a user-entered date is valid before you convert it to a date datatype. To convert a value into a date value, use the Date function. The year value must be in the range 01 to 9999.

Examples

Example 1

This statement returns true:

IsDate("Jan 1, 05")

Example 2

This statement returns false:

IsDate("Jan 32, 2005")

Example 3

If the SingleLineEdit sle_Date_Of_Hire contains 7/1/99, these statements store 1999-07-01 in HireDate:

Date HireDate

IF IsDate(sle_Date_Of_Hire.text) THEN

    HireDate = Date(sle_Date_Of_Hire.text)

END IF