Check For Existing Record

I have a unique index set on two fields in my table, InspDate and StoreNo. I
am trying to trap the error of attempting to add a duplicate by having the
code below in the LostFocus Event for the InspDate. I am running around in
circles. Can someone please help?


Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub


tia
ridgerunner

Usually verification code is placed in the BeforeUpdate event of a control
using a Domain function to look for duplicates.

ridgerunner wrote:
I have a unique index set on two fields in my table, InspDate and StoreNo. I
am trying to trap the error of attempting to add a duplicate by having the
code below in the LostFocus Event for the InspDate. I am running around in
circles. Can someone please help?

Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub

tia
ridgerunner

--
RuralGuy (RG for short) aka Allan Bunch MS Access MVP - acXP WinXP Pro
Please post back to this forum so all may benefit.

Message posted via http://www.accessmonster.com

Can you please explain "Domain Function".

"ruralguy via AccessMonster.com" wrote:

Usually verification code is placed in the BeforeUpdate event of a control
using a Domain function to look for duplicates.

ridgerunner wrote:
I have a unique index set on two fields in my table, InspDate and StoreNo. I
am trying to trap the error of attempting to add a duplicate by having the
code below in the LostFocus Event for the InspDate. I am running around in
circles. Can someone please help?

Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub

tia
ridgerunner

--
RuralGuy (RG for short) aka Allan Bunch MS Access MVP - acXP WinXP Pro
Please post back to this forum so all may benefit.

Message posted via http://www.accessmonster.com

Either the Dlookup() or DCount() functions as the next post shows.

ridgerunner wrote:
Can you please explain "Domain Function".

Usually verification code is placed in the BeforeUpdate event of a control
using a Domain function to look for duplicates.
[quoted text clipped - 16 lines]
tia
ridgerunner

--
RuralGuy (RG for short) aka Allan Bunch MS Access MVP - acXP WinXP Pro
Please post back to this forum so all may benefit.

Message posted via AccessMonster.com
http://www.accessmonster.com/Uwe/For...forms/200805/1

I would recommend using the form BeforeUpdate event.
There is no certainty that any control will get the focus.
When more than one field, thus more than one control, the testing is more
complex and likely to be less accurate.
--
Dave Hargis, Microsoft Access MVP


"ruralguy via AccessMonster.com" wrote:

Usually verification code is placed in the BeforeUpdate event of a control
using a Domain function to look for duplicates.

ridgerunner wrote:
I have a unique index set on two fields in my table, InspDate and StoreNo. I
am trying to trap the error of attempting to add a duplicate by having the
code below in the LostFocus Event for the InspDate. I am running around in
circles. Can someone please help?

Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub

tia
ridgerunner

--
RuralGuy (RG for short) aka Allan Bunch MS Access MVP - acXP WinXP Pro
Please post back to this forum so all may benefit.

Message posted via http://www.accessmonster.com

Here is my solution for multiple field duplication. I first join the two
fields in a query. For your example I would do this in a query.
NoDuplicates:[InspDate]&""&[StoreNo]
Now that you have one field named NoDuplicates to deal with, in the "Before
Update" event of InspDate you would use this code

If not IsNull(DLookup("[NoDuplicates]", (YourQueryName), "[NoDuplicates]=" &
Forms(YourFormName)![InspDate])) Then
MsgBox "Store and Inspection Date already exist. Please correct",
vbCritical, "Duplicate Entry"
End If
Exit Sub

Dont know if this will help but this works for me.


"ridgerunner" wrote:

I have a unique index set on two fields in my table, InspDate and StoreNo. I
am trying to trap the error of attempting to add a duplicate by having the
code below in the LostFocus Event for the InspDate. I am running around in
circles. Can someone please help?


Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub


tia
ridgerunner

Why would you concatenate the fields? (And you've forgotten to concatenate
the StoreNo into the argument you're passing to DLookup)

As well, you need to check in the BeforeUpdate of both InspDate and StoreNo,
since you can't be sure what order the fields will be filled in. Use a
generic function like:

Function DuplicateValue() As Boolean

If IsNull(Format(Forms![YourFormName]![InspDate]) And _
IsNull(Forms![YourFormName]![StoreNo]) = False Then
DuplicateValue = (IsNull(DLookup("StoreNo", "[YourTableName]", _
"[InspDate] = " & Format(Forms![YourFormName]![InspDate],
"\#yyyy\-mm\-dd\#") & _
" AND [StoreNo] = " & Forms![YourFormName]![StoreNo]) = False)
End If

End Function

You can then call that function in the BeforeUpdate event of both controls:

Private Sub InspDate_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub

Private Sub StoreNo_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub



--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no e-mails, please!)


"Ryan Tisserand" wrote in message
...
Here is my solution for multiple field duplication. I first join the two
fields in a query. For your example I would do this in a query.
NoDuplicates:[InspDate]&""&[StoreNo]
Now that you have one field named NoDuplicates to deal with, in the
"Before
Update" event of InspDate you would use this code

If not IsNull(DLookup("[NoDuplicates]", (YourQueryName), "[NoDuplicates]="
&
Forms(YourFormName)![InspDate])) Then
MsgBox "Store and Inspection Date already exist. Please correct",
vbCritical, "Duplicate Entry"
End If
Exit Sub

Dont know if this will help but this works for me.


"ridgerunner" wrote:

I have a unique index set on two fields in my table, InspDate and
StoreNo. I
am trying to trap the error of attempting to add a duplicate by having
the
code below in the LostFocus Event for the InspDate. I am running around
in
circles. Can someone please help?


Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub


tia
ridgerunner

Thank you. Can you please tell me where I need to put the Function?

"Douglas J. Steele" wrote:

Why would you concatenate the fields? (And you've forgotten to concatenate
the StoreNo into the argument you're passing to DLookup)

As well, you need to check in the BeforeUpdate of both InspDate and StoreNo,
since you can't be sure what order the fields will be filled in. Use a
generic function like:

Function DuplicateValue() As Boolean

If IsNull(Format(Forms![YourFormName]![InspDate]) And _
IsNull(Forms![YourFormName]![StoreNo]) = False Then
DuplicateValue = (IsNull(DLookup("StoreNo", "[YourTableName]", _
"[InspDate] = " & Format(Forms![YourFormName]![InspDate],
"\#yyyy\-mm\-dd\#") & _
" AND [StoreNo] = " & Forms![YourFormName]![StoreNo]) = False)
End If

End Function

You can then call that function in the BeforeUpdate event of both controls:

Private Sub InspDate_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub

Private Sub StoreNo_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub



--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no e-mails, please!)


"Ryan Tisserand" wrote in message
...
Here is my solution for multiple field duplication. I first join the two
fields in a query. For your example I would do this in a query.
NoDuplicates:[InspDate]&""&[StoreNo]
Now that you have one field named NoDuplicates to deal with, in the
"Before
Update" event of InspDate you would use this code

If not IsNull(DLookup("[NoDuplicates]", (YourQueryName), "[NoDuplicates]="
&
Forms(YourFormName)![InspDate])) Then
MsgBox "Store and Inspection Date already exist. Please correct",
vbCritical, "Duplicate Entry"
End If
Exit Sub

Dont know if this will help but this works for me.


"ridgerunner" wrote:

I have a unique index set on two fields in my table, InspDate and
StoreNo. I
am trying to trap the error of attempting to add a duplicate by having
the
code below in the LostFocus Event for the InspDate. I am running around
in
circles. Can someone please help?


Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub


tia
ridgerunner

Well, you'd put it in the same module as the rest of the code associated
with the form.

However, I agree with Klatuu that it probably makes more sense just to put
the code in the form's BeforeUpdate event, as opposed to in the BeforeUpdate
event of the two text boxes.

Private Sub Form_BeforeUpdate(Cancel = True)
Dim strMessage As String

If IsNull(Me.StoreNo) Then
strMessage = strMessage & "You must provide a Store Number." & vbCrLf
End If

If IsNull(Me.InspDate) Then
strMessage = strMessage & "You must provide an Inspection Date." &
vbCrLf
End If

If Len(strMessage) = 0 Then
If IsNull(DLookup("StoreNo", "[YourTableName]", _
"[InspDate] = " & Format(Forms![YourFormName]![InspDate],
"\#yyyy\-mm\-dd\#") & _
" AND [StoreNo] = " & Forms![YourFormName]![StoreNo]) = False) Then
strMessage = strMessage & "Store and Inspection Date already exist."
End If
End If

If Len(strMessage) 0 Then
Cancel = True
MsgBox strMessage, vbCritical
End If

End Sub



--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no e-mails, please!)


"ridgerunner" wrote in message
...
Thank you. Can you please tell me where I need to put the Function?

"Douglas J. Steele" wrote:

Why would you concatenate the fields? (And you've forgotten to
concatenate
the StoreNo into the argument you're passing to DLookup)

As well, you need to check in the BeforeUpdate of both InspDate and
StoreNo,
since you can't be sure what order the fields will be filled in. Use a
generic function like:

Function DuplicateValue() As Boolean

If IsNull(Format(Forms![YourFormName]![InspDate]) And _
IsNull(Forms![YourFormName]![StoreNo]) = False Then
DuplicateValue = (IsNull(DLookup("StoreNo", "[YourTableName]", _
"[InspDate] = " & Format(Forms![YourFormName]![InspDate],
"\#yyyy\-mm\-dd\#") & _
" AND [StoreNo] = " & Forms![YourFormName]![StoreNo]) = False)
End If

End Function

You can then call that function in the BeforeUpdate event of both
controls:

Private Sub InspDate_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub

Private Sub StoreNo_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub



--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no e-mails, please!)


"Ryan Tisserand" wrote in
message
...
Here is my solution for multiple field duplication. I first join the
two
fields in a query. For your example I would do this in a query.
NoDuplicates:[InspDate]&""&[StoreNo]
Now that you have one field named NoDuplicates to deal with, in the
"Before
Update" event of InspDate you would use this code

If not IsNull(DLookup("[NoDuplicates]", (YourQueryName),
"[NoDuplicates]="
&
Forms(YourFormName)![InspDate])) Then
MsgBox "Store and Inspection Date already exist. Please correct",
vbCritical, "Duplicate Entry"
End If
Exit Sub

Dont know if this will help but this works for me.


"ridgerunner" wrote:

I have a unique index set on two fields in my table, InspDate and
StoreNo. I
am trying to trap the error of attempting to add a duplicate by having
the
code below in the LostFocus Event for the InspDate. I am running
around
in
circles. Can someone please help?


Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub


tia
ridgerunner

I am sorry I missed seeing this earlier. I have the part about making
certain that a store and a date are entered covered in a command button on
the form.

I copied and pasted the code but I am getting a syntax error message and
"IF" through the "THEN" are in red when I run compile.

Private Sub Form_BeforeUpdate(Cancel As Integer)
If IsNull(DLookup("StoreNo", "[DMInspections]", _
"[InspDate] = " & Format(Forms![frmAddDMInspection]![InspDate],
"\#yyyy\-mm\-dd\#") & _
" AND [StoreNo] = " & Forms![frmAddDMInspections]![StoreNo]) = False)
Then
strMessage = strMessage & "Store and Inspection Date already exist."
End If


End Sub

"Douglas J. Steele" wrote:

Well, you'd put it in the same module as the rest of the code associated
with the form.

However, I agree with Klatuu that it probably makes more sense just to put
the code in the form's BeforeUpdate event, as opposed to in the BeforeUpdate
event of the two text boxes.

Private Sub Form_BeforeUpdate(Cancel = True)
Dim strMessage As String

If IsNull(Me.StoreNo) Then
strMessage = strMessage & "You must provide a Store Number." & vbCrLf
End If

If IsNull(Me.InspDate) Then
strMessage = strMessage & "You must provide an Inspection Date." &
vbCrLf
End If

If Len(strMessage) = 0 Then
If IsNull(DLookup("StoreNo", "[YourTableName]", _
"[InspDate] = " & Format(Forms![YourFormName]![InspDate],
"\#yyyy\-mm\-dd\#") & _
" AND [StoreNo] = " & Forms![YourFormName]![StoreNo]) = False) Then
strMessage = strMessage & "Store and Inspection Date already exist."
End If
End If

If Len(strMessage) 0 Then
Cancel = True
MsgBox strMessage, vbCritical
End If

End Sub



--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no e-mails, please!)


"ridgerunner" wrote in message
...
Thank you. Can you please tell me where I need to put the Function?

"Douglas J. Steele" wrote:

Why would you concatenate the fields? (And you've forgotten to
concatenate
the StoreNo into the argument you're passing to DLookup)

As well, you need to check in the BeforeUpdate of both InspDate and
StoreNo,
since you can't be sure what order the fields will be filled in. Use a
generic function like:

Function DuplicateValue() As Boolean

If IsNull(Format(Forms![YourFormName]![InspDate]) And _
IsNull(Forms![YourFormName]![StoreNo]) = False Then
DuplicateValue = (IsNull(DLookup("StoreNo", "[YourTableName]", _
"[InspDate] = " & Format(Forms![YourFormName]![InspDate],
"\#yyyy\-mm\-dd\#") & _
" AND [StoreNo] = " & Forms![YourFormName]![StoreNo]) = False)
End If

End Function

You can then call that function in the BeforeUpdate event of both
controls:

Private Sub InspDate_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub

Private Sub StoreNo_BeforeUpdate(Cancel As Integer)

If DuplicateValue() = True Then
MsgBox "Store and Inspection Date already exist. Please correct", _
vbCritical, "Duplicate Entry"
Cancel = True
End If

End Sub



--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no e-mails, please!)


"Ryan Tisserand" wrote in
message
...
Here is my solution for multiple field duplication. I first join the
two
fields in a query. For your example I would do this in a query.
NoDuplicates:[InspDate]&""&[StoreNo]
Now that you have one field named NoDuplicates to deal with, in the
"Before
Update" event of InspDate you would use this code

If not IsNull(DLookup("[NoDuplicates]", (YourQueryName),
"[NoDuplicates]="
&
Forms(YourFormName)![InspDate])) Then
MsgBox "Store and Inspection Date already exist. Please correct",
vbCritical, "Duplicate Entry"
End If
Exit Sub

Dont know if this will help but this works for me.


"ridgerunner" wrote:

I have a unique index set on two fields in my table, InspDate and
StoreNo. I
am trying to trap the error of attempting to add a duplicate by having
the
code below in the LostFocus Event for the InspDate. I am running
around
in
circles. Can someone please help?


Private Sub InspDate_LostFocus()
If DMInspections.StoreNo = True Then
ElseIf DMInspDet.InspDate = True Then
MsgBox "Store and Inspection Date already exist. Please correct"
Me.InspDate.SetFocus
Else: Me.DMnameID.SetFocus
Exit Sub
End If
End Sub


tia
ridgerunner