In an order entry system I want to validate that the company ID entered is one
that exists in a related table. I don't want to use a lookup value since the
list would be too long. I just want to validate that the entry is at least
one that is in the company table. Is this something I would have to write
some VB code for?
Thanks,
Rich Kayton
2  2140 
"Rich Kayton" <rk*****@buffal o.eduschreef in bericht news:ee******** **@prometheus.a csu.buffalo.edu ...
In an order entry system I want to validate that the company ID entered is one
that exists in a related table. I don't want to use a lookup value since the
list would be too long. I just want to validate that the entry is at least
one that is in the company table. Is this something I would have to write
some VB code for?
Thanks,
Rich Kayton
Check DLookup in the Help.
(Assuming CompID is Numeric and is a field in your validation table)
Use the BeforeUpdate event to validate like:
Private Sub CompID_BeforeUp date(Cancel As Integer)
If IsNull(DLookup( "[CompID]","RelatedTable ","CompID = " & Me!CompID)) Then
msgbox "Wrong Company"
Cancel=true
End If
End Sub
Arno R
Define a relation between the two tables and set Referential Integrity.
Rich Kayton schreef:
In an order entry system I want to validate that the company ID entered is one
that exists in a related table. I don't want to use a lookup value since the
list would be too long. I just want to validate that the entry is at least
one that is in the company table. Is this something I would have to write
some VB code for?
Thanks,
Rich Kayton
--
Bas Cost Budde
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