[AccessD] BeforeUpdate v. AfterUpdate

That's interesting, because I use OldValue with AfterUpdate all the time,
and it works just fine.

Mark Whittinghill
Symphony Information Services
612-333-1311
mwhittinghill at symphonyinfo.com
----- Original Message -----
From: "John Colby" <jcolby at colbyconsulting.com>
To: <accessd at databaseadvisors.com>
Sent: Tuesday, May 20, 2003 7:39 AM
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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