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28/01/1999 13:12:35
 
 
À
28/01/1999 13:05:56
Jonathan Cochran
Alion Science and Technology
Maryland, États-Unis
Information générale
Forum:
Visual FoxPro
Catégorie:
Classes - VCX
Titre:
Divers
Thread ID:
00180248
Message ID:
00181432
Vues:
10
>In VFP 6, you can use the VARTYPE() function. It will return "O" for an object, and "X" for a .NULL. value.

If the variable doesn't exist, VATYPE() smokes with a Variable "whatever" not found, so if the variable might not exist, or might be out of scope, TYPE() is still preferable.

>
>>Walter,
>>
>>I'm not sure you see the point:
>>
>>create cursor temp ( iID i, cFirstName c(40))
>>insert into temp values ( 0, "Walter" )
>>scatter name oRow
>>
>>? type( "oRow.Name" ) && U
>>? type( "oRow.cFirstName" ) && C
>>? type( "oRow" ) && O
>>
>>oRwo is indeed an object, it has no .Name property to test
>>
>>FWIW my IsObject() udf is:
>>
>>lparameter roObject
>>
>>return( ( type( "m.roObject" ) == 'O' ) and ( ! isnull( m.roObject ) ) )
>>
>>
>>>Sure, but then you would use something like TYPE("Table.fields")=cType
>>>I was only purposing anotherway for
>>>
>>>lExist=TYPE("oObject") AND !ISNULL(oObject)
>>>
>>>to determine if a object exists.
EMail: EdR@edrauh.com
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