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Determining existence of an object
Message
From
09/08/1999 23:52:42
 
 
To
09/08/1999 22:17:21
General information
Forum:
Visual FoxPro
Category:
Classes - VCX
Miscellaneous
Thread ID:
00251780
Message ID:
00251864
Views:
14
Sooo...to make a long story short:

IF VARTYPE(oMyObject) = "O" && It's Allliiive....
ELSE && It ain't no object or it's a daid object
ENDIF

:-D


>Right you are. I was surpirised to find out this is true. Still learnin'.
>
>>It was my understanding that VARTYPE would only pass an 'O' if the variable was a living object. If VARTYPE were to classify a dead object it would return an 'X' because the variable was NULL.
>>
>>Glenn
>>
>>>I am sure you know John, but hust to clarify-
>>>
>>>the test below will determine if the variable named oMyObject is of the object type, but does not test to see if it actually references a living object. To do that, you either need to check the type of one of the object's properties (usually "name"), or, after testing the type, checking for ISNULL(oMyObject)
>>>
>>>>Hi Jim,
>>>>
>>>>IF VARTYPE(oMyObject) = "O" && It's an object
>>>>IF VARTYPE(oMyObject) = "U" && It ain't nothing yet
>>>>
>>>>>I am using the addobject method to add an object to my form from a custom container class. Once it is created, how can test to see if it already exists?
>>>>>
>>>>>Thanks
>>>>>Jim Oswald
>>>>>joswald@innova.net
------------------------------------------------
John Koziol, ex-MVP, ex-MS, ex-FoxTeam. Just call me "X"
"When the going gets weird, the weird turn pro" - Hunter Thompson (Gonzo) RIP 2/19/05
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