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#1
January 7th, 2008, 05:37 PM
posted to microsoft.public.access.forms
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Problem with Before update
I have the following code in my database:
Private Sub case_no_BeforeUpdate(Cancel As Integer) If Not IsNull(DLookup("Case_no", "tbllawsuittracking", "Case_no = " & Me.Case_No)) Then Cancel = True MsgBox "This is a duplicate", vbExclamation, "Duplicate value!" End If End Sub Case number is a text field in the tblLawsuitTracking table. What i am trying to do is prevent a duplicate case number upon entry when entering data in a form. Problem is I just can't seem to get the code working properly. Any suggestions on why this isn't working? 
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#2
January 7th, 2008, 06:34 PM
posted to microsoft.public.access.forms
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Problem with Before update
What is the data type of the field Case_no in tbllawsuittracking?
As written, it is expected to be a numeric data type. If it is text, you need to enclose the compare value in quotes: If Not IsNull(DLookup("Case_no", "tbllawsuittracking", "Case_no = '" & Me.Case_No & "'")) Then -- Dave Hargis, Microsoft Access MVP "scott04" wrote: I have the following code in my database: Private Sub case_no_BeforeUpdate(Cancel As Integer) If Not IsNull(DLookup("Case_no", "tbllawsuittracking", "Case_no = " & Me.Case_No)) Then Cancel = True MsgBox "This is a duplicate", vbExclamation, "Duplicate value!" End If End Sub Case number is a text field in the tblLawsuitTracking table. What i am trying to do is prevent a duplicate case number upon entry when entering data in a form. Problem is I just can't seem to get the code working properly. Any suggestions on why this isn't working?
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#3
January 7th, 2008, 06:46 PM
posted to microsoft.public.access.forms
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Problem with Before update
Dave,
Thank you. It was a text field "Klatuu" wrote: What is the data type of the field Case_no in tbllawsuittracking? As written, it is expected to be a numeric data type. If it is text, you need to enclose the compare value in quotes: If Not IsNull(DLookup("Case_no", "tbllawsuittracking", "Case_no = '" & Me.Case_No & "'")) Then -- Dave Hargis, Microsoft Access MVP "scott04" wrote: I have the following code in my database: Private Sub case_no_BeforeUpdate(Cancel As Integer) If Not IsNull(DLookup("Case_no", "tbllawsuittracking", "Case_no = " & Me.Case_No)) Then Cancel = True MsgBox "This is a duplicate", vbExclamation, "Duplicate value!" End If End Sub Case number is a text field in the tblLawsuitTracking table. What i am trying to do is prevent a duplicate case number upon entry when entering data in a form. Problem is I just can't seem to get the code working properly. Any suggestions on why this isn't working?
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