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Memo field update

Posted on 2013-01-28
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Last Modified: 2013-01-28
Hi Experts,
I have added a user name and time stamp to a memo field as an "after update" event.  The code works when something is added, but also is fired when something is deleted, which I don't want. Could someone please modify the attached code so that it is only fired when something is added?
Thanks experts!
Private Sub Notes_AfterUpdate()
   
    Me.Notes = Me.Notes & " (added by " & fOSUserName & " on " & Now() & ")" & vbCrLf
    
End Sub

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Question by:Harry Batt
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9 Comments
 
LVL 77

Expert Comment

by:peter57r
ID: 38827243
What you are asking is pretty well impossible unless you are saying that you have specific separate procedures for adding content and deleteing content.

There is no way to tell whether content was changed, added or deleted unless you get involved in some very sophisticated character matching - all you can tell is that something was done to the text.
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LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 38827266
what version of access are you using?
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LVL 77

Expert Comment

by:peter57r
ID: 38827302
I suppose that if you did something like...

Me.Notes = Me.Notes & " (added by " & fOSUserName & " on " & Now() & ") ***" & vbCrLf

then you could test for the presence of *** in the last, say, 7 characters and if found , do not append the username and timestamp.
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Author Comment

by:Harry Batt
ID: 38827340
I am using Access 2007
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LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 38827402
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Author Comment

by:Harry Batt
ID: 38827583
I find that the ColumnHistory method also appends the code with the user name and date when data is being deleted, so unless I am wrong, I don't believe this is a viable solution. I haven't tried Peter57's character matching solution, but if this is the optimal way of handling this issue, what would the code look like?
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LVL 120

Accepted Solution

by:
Rey Obrero (Capricorn1) earned 500 total points
ID: 38827612
can you try using

if len(me.notes).oldvalue > len(me.notes).value  then  'this means that something was deleted
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Author Comment

by:Harry Batt
ID: 38827871
Capricorn1,

With a slight modification, this works.  (The .value expression triggered an error)

Thanks!
Private Sub Notes_AfterUpdate()
    If Len(Me.Notes.OldValue) > Len(Me.Notes) Then 'this means that something was deleted
        Exit Sub
    Else

    Me.Notes = Me.Notes & " (added by " & fOSUserName & " on " & Now() & ")" & vbCrLf
    
    End If
End Sub

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Author Comment

by:Harry Batt
ID: 38828154
One change to correct a bug when deleting:
Private Sub Notes_AfterUpdate()
   
    If Len(Me.Notes.OldValue) > Len(Me.Notes.Value) Then 'this means that something was deleted
    
        Exit Sub
    Else
 If Me.Dirty Then Me.Dirty = False
    Me.Notes = Me.Notes & " (added by " & fOSUserName & " on " & Now() & ")" & vbCrLf
    
    End If
   
End Sub

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