IsNullDateTime

See Also: Time and Date Functions

Purpose

Determines if a DateTime value is null, i.e. empty.

Return Type

Boolean

Syntax

(IsNullDateTime( {DateTime} ))

Where:

• {DateTime} is a value of type DateTime

Example

Procedure TestIsNullDateTime

    DateTime dtVal

    If (IsNullDateTime(dtVal)) Begin

        Showln "It's originally a null DateTime"

    End

    Else Begin

        Showln "It's originally not a null DateTime"

    End

    Showln "Setting DateTime variable to current local time"        

    Move (CurrentDateTime()) to dtVal

    If (IsNullDateTime(dtVal)) Begin

        Showln "It's still a null DateTime"

    End

    Else Begin

        Showln "Now it's no longer a null DateTime"

    End

End_Procedure

Notes

IsNullDateTime returns true if the value of the DateTime argument is null. This is the recommended way to test if a DateTime variable is "empty" (i.e., null).