Difference between revisions of "ISBLANK()"
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==Purpose== | ==Purpose== | ||
Function to check for empty value | Function to check for empty value | ||
| − | |||
==Syntax== | ==Syntax== | ||
ISBLANK(<expC> | <expD> | <expT> | <expL> | <memofield> | <expN>) | ISBLANK(<expC> | <expD> | <expT> | <expL> | <memofield> | <expN>) | ||
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==See Also== | ==See Also== | ||
[[CTOD()]], [[CTOT()]], [[IIF()]], [[IS_ARRAY()]], [[IS_FLOAT()]], [[IS_INT()]], [[IS_OBJECT()]], [[IS_STRING()]], [[ISALPHA()]], [[ISDIGIT()]], [[ISLOWER()]], [[ISUPPER()]], [[SET CENTURY]], [[SET DATE]], [[SET MARK]], [[SET SECONDS]], [[SPACE()]], [[TYPE()]] | [[CTOD()]], [[CTOT()]], [[IIF()]], [[IS_ARRAY()]], [[IS_FLOAT()]], [[IS_INT()]], [[IS_OBJECT()]], [[IS_STRING()]], [[ISALPHA()]], [[ISDIGIT()]], [[ISLOWER()]], [[ISUPPER()]], [[SET CENTURY]], [[SET DATE]], [[SET MARK]], [[SET SECONDS]], [[SPACE()]], [[TYPE()]] | ||
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==Description== | ==Description== | ||
The ISBLANK() function returns .T. if the specified expression is 'empty'. | The ISBLANK() function returns .T. if the specified expression is 'empty'. | ||
| − | + | {| class="wikitable" width="100%" | |
| − | {| class="wikitable" | + | !width="30%"|Data Type||Empty |
| − | !Data Type||Empty | + | |
|- | |- | ||
|Character||Space(0), "", [], ‘’, no text entered | |Character||Space(0), "", [], ‘’, no text entered | ||
|- | |- | ||
| − | |Date||CTOD(""),{}, {00/00/0000}, { / / } and other SET CENTURY, SET MARK and SET DATE variations | + | |valign="top"|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 | + | |valign="top"|Datetime||CTOT("") , { / / : : AM} and other SET CENTURY, SET MARK, SET SECONDS and SET DATE variations |
|- | |- | ||
|Logical||.F. | |Logical||.F. | ||
| Line 31: | Line 27: | ||
|- | |- | ||
|} | |} | ||
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| Line 40: | Line 35: | ||
endif | endif | ||
</code> | </code> | ||
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==Products== | ==Products== | ||
| − | + | Lianja, Lianja Server | |
[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Functions]] | [[Category:Functions]] | ||
| + | [[Category:Lianja VFP Extensions]] | ||
| + | [[Category:VFP Function Extensions]] | ||
Latest revision as of 12:33, 1 February 2013
Purpose
Function to check for empty value
Syntax
ISBLANK(<expC> | <expD> | <expT> | <expL> | <memofield> | <expN>)
See Also
CTOD(), CTOT(), IIF(), IS_ARRAY(), IS_FLOAT(), IS_INT(), IS_OBJECT(), IS_STRING(), ISALPHA(), ISDIGIT(), ISLOWER(), ISUPPER(), 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
Lianja, Lianja Server
