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How prevent more than one record as the default
Posted on 2016-10-21
I have a form with a checkbox. There can only be one record in the record source table marked as the default record. If the user attempts to make a checkbox true for a record when another record is already marked as true I want the user to get a warning letting them know that there is already a default record.
Here is what I have but it is not working:
Here is what I have but it is not working:
Private Sub chkbxDefaultSig_BeforeUpdate(Cancel As Integer)
Dim strCriteria As String
strCriteria = "Initials = " & Me.txtInitials
If DCount("DefaultSig", "tblSignatures", strCriteria) > 0 Then
Me.Undo
MsgBox "Warning: A default signature has already been selected."
Cancel = True
End If
End Sub
[X]
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8 Comments
Active today
strCriteria needs to contain a condition that the primary key is <> to the record you are on. For example, assuming PK is numeric
strCriteria = "Initials = " & Me.txtInitials & " AND MyPkFieldname <> " & me.MyPk
Active today
Try this:
Private Sub chkbxDefaultSig_BeforeUpdate(Cancel As Integer)
Dim strCriteria As String
strCriteria = "Initials = " & Me.txtInitials
Cancel = Not IsNull(DLookup("DefaultSig", "tblSignatures", strCriteria))
If Cancel = True Then
MsgBox "Warning: A default signature has already been selected.", vbExclamation + vbOkOnly
Me.Undo
End If
End Sub
Active today
Crystal: the PK is text. And the Yes/No checkbox is where the beforeupdate code is going.
Gustav: I believe my original post contained improper field references. I have changed it now to be:
Which works fine if I try to make a record the default via the checkbox and there already is a default record. But if I try to UNcheck the default record I get the message and it won't let me UNcheck it.
Gustav: I believe my original post contained improper field references. I have changed it now to be:
Dim strCriteria As String
strCriteria = "DefaultSig = " & Me.chkbxDefaultSig
Cancel = Not IsNull(DLookup("DefaultSig", "tblSignatures", strCriteria))
If Cancel = True Then
MsgBox "Warning: A default signature has already been selected.", vbExclamation + vbOkOnly
Me.Undo
End If
Which works fine if I try to make a record the default via the checkbox and there already is a default record. But if I try to UNcheck the default record I get the message and it won't let me UNcheck it.
Active today
Yes, that's right. Try this with a check of the value:
Private Sub chkbxDefaultSig_BeforeUpdate(Cancel As Integer)
Dim strCriteria As String
If Me!chkbxDefaultSig.Value = True Then
strCriteria = "Initials = " & Me.txtInitials
Cancel = Not IsNull(DLookup("DefaultSig", "tblSignatures", strCriteria))
End If
If Cancel = True Then
MsgBox "Warning: A default signature has already been selected.", vbExclamation + vbOkOnly
Me.Undo
End If
End Sub
Active today
to clarify:
you have a table called tblSignatures
with:
a Yes/No field called DefaultSig
a field called Initials to indicate who the signature is for (if more than one person is in here)
What is the PK fieldname?
you have a table called tblSignatures
with:
a Yes/No field called DefaultSig
a field called Initials to indicate who the signature is for (if more than one person is in here)
What is the PK fieldname?
Active today
Worked! with one minor correction:
Dim strCriteria As String
If Me!chkbxDefaultSig.Value = True Then
strCriteria = "DefaultSig = " & Me.chkbxDefaultSig
Cancel = Not IsNull(DLookup("DefaultSig
End If
If Cancel = True Then
MsgBox "Warning: A default signature has already been selected.", vbExclamation + vbOKOnly
Me.Undo
End If
Dim strCriteria As String
If Me!chkbxDefaultSig.Value = True Then
strCriteria = "DefaultSig = " & Me.chkbxDefaultSig
Cancel = Not IsNull(DLookup("DefaultSig
End If
If Cancel = True Then
MsgBox "Warning: A default signature has already been selected.", vbExclamation + vbOKOnly
Me.Undo
End If
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