Difference between revisions of "ISBLANK()"
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Revision as of 12:36, 23 March 2009
Class
Expressions and Type Conversion
Purpose
Function to check for empty value
Syntax
ISBLANK(<expC> | <expD> | <expT> | <expL> | <memofield> | <expN>)
See Also
CTOD(), CTOT(), IIF(), SET CENTURY, SET DATE, SET MARK, SET SECONDS, SPACE(), TYPE()
Description
The ISBLANK() function returns .T. if the specified expression is 'empty'.
| Data Type | Empty |
|---|---|
| Character | Space(0), "", [], , no text entered |
| Date | CTOD(""),{}, {00/00/0000}, { / / } and other SET CENTURY, SET MARK and SET DATE variations |
| Datetime | CTOT("") , { / / : : AM} and other SET CENTURY, SET MARK, SET SECONDS and SET DATE variations |
| Logical | .F. |
| Memo | No data entered |
| Numeric | 0 |
Example
if isblank(name + address) dialog box "Name and address not specified." endif
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
