[AccessD] BeforeUpdate v. AfterUpdate

Charlotte Foust cfoust at infostatsystems.com
Tue May 20 09:41:03 CDT 2003


I often use the Tag property for that purpose instead of a variable ...
Except when I'm using Tag for something else, of course. <g>

Charlotte Foust

-----Original Message-----
From: John Colby [mailto:jcolby at colbyconsulting.com] 
Sent: Tuesday, May 20, 2003 5:40 AM
To: accessd at databaseadvisors.com
Subject: RE: [AccessD] BeforeUpdate v. AfterUpdate


OldValue is set to Value when the data stores, thus by AfterUpdate the
OldValue data has indeed been lost.  Use BeforeUpdate to store the value
to a variable, then compare to that variable in AfterUpdate.

John W. Colby
www.colbyconsulting.com

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Arthur Fuller
Sent: Tuesday, May 20, 2003 9:29 AM
To: AccessD
Subject: [AccessD] BeforeUpdate v. AfterUpdate


>From my experiments, it appears that MyControl.OldValue is available 
>for
scrutiny only in the BeforeUpdate event. In the AfterUpdate event it
seems to be lost. I just wanted to confirm this hypothesis.

The point of the exercise is that I need to keep track of which columns
a user has changed and then take action accordingly. I have to update
some columns in another table depending on which columns changed in the
current table, but only if the update to the current table was
successul. I don't actually care about the old value, I'm just using it
to determine which columns changed. But by the time I get to AfterUpdate
I've lost the information.

Any suggestions as to how to work around this?

TIA,
Arthur

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