Check Duplicate with VBA - microsoft.public.access.formscoding

Dear all, Can I do check duplicate using VBA when user enter data in a certain field? If the data that tuser entered was already in the system, give a message 'Duplicate data' and the user have to enter a new data. Thank you in advance. KT -- Message posted via AccessMonster.com http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200711/1

Use the control's BeforeUpdate event to check your table's data (code sample below assumes the field is a numeric data type): Private Sub NameOfTextbox_BeforeUpdate(Cancel As Integer) If DCount("*", "NameOfYourTable", "NameOfFieldBeingChecked=" & _ Me.NameOfTextbox.Value) > 0 Then Cancel = True MsgBox "Duplicate data!" Me.NameOfTextbox.Undo End If End Sub -- Ken Snell <MS ACCESS MVP> "KimTong via AccessMonster.com" <u35279@uwe> wrote in message news:7c00cb7a836f1@uwe... > Dear all, > > Can I do check duplicate using VBA when user enter data in a certain > field? > If the data that tuser entered was already in the system, give a message > 'Duplicate data' and the user have to enter a new data. > > Thank you in advance. > > KT > > -- > Message posted via AccessMonster.com > http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200711/1 >

On 30 Nov, 22:12, "Ken Snell $MVP$" <kthsneisll...@ncoomcastt.renaetl> wrote: > Use the control's BeforeUpdate event to check your table's data (code sample > below assumes the field is a numeric data type): > > Private Sub NameOfTextbox_BeforeUpdate(Cancel As Integer) > If DCount("*", "NameOfYourTable", "NameOfFieldBeingChecked=" & _ > Me.NameOfTextbox.Value) > 0 Then > Cancel = True > MsgBox "Duplicate data!" > Me.NameOfTextbox.Undo > End If > End Sub > > -- > > Ken Snell > <MS ACCESS MVP> > > "KimTong via AccessMonster.com" <u35279@uwe> wrote in messagenews:7c00cb7a836f1@uwe... > > > > > > > Dear all, > > > Can I do check duplicate using VBA when user enter data in a certain > > field? > > If the data that tuser entered was already in the system, give a message > > 'Duplicate data' and the user have to enter a new data. > > > Thank you in advance. > > > KT > > > -- > > Message posted via AccessMonster.com > >http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200711/1 Hi Ken, I was trying to use your code to check for duplicates entry. But it's giving to me an error like this "missing query operator..." What I'm doing wrong? Many Thanks. Stefano.

The code I posted uses generic names. Post the code that you're trying to use so that we can see the actual names and how you've constructed the code. -- Ken Snell <MS ACCESS MVP> <riccifs@tin.it> wrote in message news:7f3c7414-f33f-4636-9131-3f80aa6bc395@v4g2000hsf.googlegroups.com... > On 30 Nov, 22:12, "Ken Snell $MVP$" > <kthsneisll...@ncoomcastt.renaetl> wrote: >> Use the control's BeforeUpdate event to check your table's data (code >> sample >> below assumes the field is a numeric data type): >> >> Private Sub NameOfTextbox_BeforeUpdate(Cancel As Integer) >> If DCount("*", "NameOfYourTable", "NameOfFieldBeingChecked=" & _ >> Me.NameOfTextbox.Value) > 0 Then >> Cancel = True >> MsgBox "Duplicate data!" >> Me.NameOfTextbox.Undo >> End If >> End Sub >> >> -- >> >> Ken Snell >> <MS ACCESS MVP> >> >> "KimTong via AccessMonster.com" <u35279@uwe> wrote in >> messagenews:7c00cb7a836f1@uwe... >> >> >> >> >> >> > Dear all, >> >> > Can I do check duplicate using VBA when user enter data in a certain >> > field? >> > If the data that tuser entered was already in the system, give a >> > message >> > 'Duplicate data' and the user have to enter a new data. >> >> > Thank you in advance. >> >> > KT >> >> > -- >> > Message posted via AccessMonster.com >> >http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200711/1 > > Hi Ken, > I was trying to use your code to check for duplicates entry. But it's > giving to me an error like this "missing query operator..." > What I'm doing wrong? > > Many Thanks. > Stefano.

On 1 Dic, 17:48, "Ken Snell $MVP$" <kthsneisll...@ncoomcastt.renaetl> wrote: > The code I posted uses generic names. Post the code that you're trying to > use so that we can see the actual names and how you've constructed the code. > > -- > > Ken Snell > <MS ACCESS MVP> > > <ricc...@tin.it> wrote in message > > news:7f3c7414-f33f-4636-9131-3f80aa6bc395@v4g2000hsf.googlegroups.com... > > > On 30 Nov, 22:12, "Ken Snell $MVP$" > > <kthsneisll...@ncoomcastt.renaetl> wrote: > >> Use the control's BeforeUpdate event to check your table's data (code > >> sample > >> below assumes the field is a numeric data type): > > >> Private Sub NameOfTextbox_BeforeUpdate(Cancel As Integer) > >> If DCount("*", "NameOfYourTable", "NameOfFieldBeingChecked=" & _ > >> Me.NameOfTextbox.Value) > 0 Then > >> Cancel = True > >> MsgBox "Duplicate data!" > >> Me.NameOfTextbox.Undo > >> End If > >> End Sub > > >> -- > > >> Ken Snell > >> <MS ACCESS MVP> > > >> "KimTong via AccessMonster.com" <u35279@uwe> wrote in > >> messagenews:7c00cb7a836f1@uwe... > > >> > Dear all, > > >> > Can I do check duplicate using VBA when user enter data in a certain > >> > field? > >> > If the data that tuser entered was already in the system, give a > >> > message > >> > 'Duplicate data' and the user have to enter a new data. > > >> > Thank you in advance. > > >> > KT > > >> > -- > >> > Message posted via AccessMonster.com > >> >http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200711/1 > > > Hi Ken, > > I was trying to use your code to check for duplicates entry. But it's > > giving to me an error like this "missing query operator..." > > What I'm doing wrong? > > > Many Thanks. > > Stefano. Hi Ken, I copied and pasted your code as you posted and I changed it with my name. Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) If DCount("*", "tblEsercenti", "Ragione_sociale=" & _ Me.Ragione_sociale.Value) > 0 Then Cancel = True MsgBox "Duplicate data!" Me.Ragione_sociale.Undo End If End Sub I hope you will understand it, they are in Italian. Many Thanks for your help!, Stefano.

Ciao riccifs@tin.it wrote: ---cut--- prova cosi aggiugendo delle apici singole se Ragione_Sociale � tipo testo: > Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) If Not IsNull(DLookup("[Ragione Sociale]", "tblEsercenti", _ "[Ragione sociale]=" & Chr$(34) & Me.Ragione_sociale.Value & Chr$(34))) _ And Me.Ragione_sociale.Value <> Nz(Ragione_sociale.Value.OldValue) Then Cancel = True MsgBox "Duplicate data!" Me.Ragione_sociale.Undo End If > End Sub Oppure dai un occhiata qui � il sito da cui ho appreso il codice suddetto: http://www.donkarl.com/it/FAQ/FAQ4Maschere.htm#4.25 > > I hope you will understand it, they are in Italian. > > Many Thanks for your help!, > Stefano. sei Italiano, allora posta su: Microsoft.public.it.office.access oppure it.comp.appl.access sono due ottimi NewsGroup in italiano. -- Ciao Geppo

On 1 Dic, 18:29, "geppo" <c...@tin.it.invalid> wrote: > Ciao ricc...@tin.it wrote: > > ---cut--- > > prova cosi aggiugendo delle apici singole se Ragione_Sociale =E8 tipo test= o: > > > Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) > > If Not IsNull(DLookup("[Ragione Sociale]", "tblEsercenti", _ > "[Ragione sociale]=3D" & Chr$(34) & Me.Ragione_sociale.Value & Chr$(34)= )) _ > And Me.Ragione_sociale.Value <> Nz(Ragione_sociale.Value.OldValue) Th= en > Cancel =3D True > MsgBox "Duplicate data!" > Me.Ragione_sociale.Undo > End If > > > End Sub > > Oppure dai un occhiata qui =E8 il sito da cui ho appreso il codice suddett= o: > > http://www.donkarl.com/it/FAQ/FAQ4Maschere.htm#4.25 > > > > > I hope you will understand it, they are in Italian. > > > Many Thanks for your help!, > > Stefano. > > sei Italiano, allora posta su: > > Microsoft.public.it.office.access > > oppure > > it.comp.appl.access > > sono due ottimi NewsGroup in italiano. > > -- > Ciao > Geppo Ciao Geppo, grazie della tua risposta, ma mi da errore 424 oggetto richiesto... che faccio! Stefano.

Ciao riccifs@tin.it wrote: > On 1 Dic, 18:29, "geppo" <c...@tin.it.invalid> wrote: >> Ciao ricc...@tin.it wrote: >> >> ---cut--- >> >> prova cosi aggiugendo delle apici singole se Ragione_Sociale � tipo >> testo: >> >>> Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) >> >> If Not IsNull(DLookup("[Ragione Sociale]", "tblEsercenti", _ >> "[Ragione sociale]=" & Chr$(34) & Me.Ragione_sociale.Value & >> Chr$(34))) _ And Me.Ragione_sociale.Value <> >> Nz(Ragione_sociale.Value.OldValue) Then Cancel = True >> MsgBox "Duplicate data!" >> Me.Ragione_sociale.Undo >> End If >> >>> End Sub >> >> Oppure dai un occhiata qui � il sito da cui ho appreso il codice >> suddetto: >> >> http://www.donkarl.com/it/FAQ/FAQ4Maschere.htm#4.25 >> >> >> >>> I hope you will understand it, they are in Italian. >> >>> Many Thanks for your help!, >>> Stefano. >> >> sei Italiano, allora posta su: >> >> Microsoft.public.it.office.access >> >> oppure >> >> it.comp.appl.access >> >> sono due ottimi NewsGroup in italiano. >> >> -- >> Ciao >> Geppo > > Ciao Geppo, > grazie della tua risposta, ma mi da errore 424 oggetto richiesto... > che faccio! > > Stefano. In che punto del codice ti da l'errore? Comunque accertati che i nomi dei controlli siano scritti in modo corretto. -- Ciao geppo

On 1 Dic, 19:41, "geppo" <c...@tin.it.invalid> wrote: > Ciao ricc...@tin.it wrote: > > On 1 Dic, 18:29, "geppo" <c...@tin.it.invalid> wrote: > >> Ciao ricc...@tin.it wrote: > > >> ---cut--- > > >> prova cosi aggiugendo delle apici singole se Ragione_Sociale =E8 tipo > >> testo: > > >>> Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) > > >> If Not IsNull(DLookup("[Ragione Sociale]", "tblEsercenti", _ > >> "[Ragione sociale]=3D" & Chr$(34) & Me.Ragione_sociale.Value & > >> Chr$(34))) _ And Me.Ragione_sociale.Value <> > >> Nz(Ragione_sociale.Value.OldValue) Then Cancel =3D True > >> MsgBox "Duplicate data!" > >> Me.Ragione_sociale.Undo > >> End If > > >>> End Sub > > >> Oppure dai un occhiata qui =E8 il sito da cui ho appreso il codice > >> suddetto: > > >>http://www.donkarl.com/it/FAQ/FAQ4Maschere.htm#4.25 > > >>> I hope you will understand it, they are in Italian. > > >>> Many Thanks for your help!, > >>> Stefano. > > >> sei Italiano, allora posta su: > > >> Microsoft.public.it.office.access > > >> oppure > > >> it.comp.appl.access > > >> sono due ottimi NewsGroup in italiano. > > >> -- > >> Ciao > >> Geppo > > > Ciao Geppo, > > grazie della tua risposta, ma mi da errore 424 oggetto richiesto... > > che faccio! > > > Stefano. > > In che punto del codice ti da l'errore? > > Comunque accertati che i nomi dei controlli siano scritti in modo corretto= .. > > -- > Ciao > geppo In questo punto: If Not IsNull(DLookup("[Ragione_sociale]", "tblEsercenti", _ "[Ragione_sociale]=3D" & Chr$(34) & Me.Ragione_sociale.Value & Chr $(34))) _ And Me.Ragione_sociale.Value <> Nz(Ragione_sociale.Value.OldValue) Then Per i nomi sui controlli credo non siano scritti bene... boo!? Grazie comunque, Stefano.

On 1 Dic, 20:07, ricc...@tin.it wrote: > On 1 Dic, 19:41, "geppo" <c...@tin.it.invalid> wrote: > > > > > Ciao ricc...@tin.it wrote: > > > On 1 Dic, 18:29, "geppo" <c...@tin.it.invalid> wrote: > > >> Ciao ricc...@tin.it wrote: > > > >> ---cut--- > > > >> prova cosi aggiugendo delle apici singole se Ragione_Sociale =E8 tipo= > > >> testo: > > > >>> Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) > > > >> If Not IsNull(DLookup("[Ragione Sociale]", "tblEsercenti", _ > > >> "[Ragione sociale]=3D" & Chr$(34) & Me.Ragione_sociale.Value & > > >> Chr$(34))) _ And Me.Ragione_sociale.Value <> > > >> Nz(Ragione_sociale.Value.OldValue) Then Cancel =3D True > > >> MsgBox "Duplicate data!" > > >> Me.Ragione_sociale.Undo > > >> End If > > > >>> End Sub > > > >> Oppure dai un occhiata qui =E8 il sito da cui ho appreso il codice > > >> suddetto: > > > >>http://www.donkarl.com/it/FAQ/FAQ4Maschere.htm#4.25 > > > >>> I hope you will understand it, they are in Italian. > > > >>> Many Thanks for your help!, > > >>> Stefano. > > > >> sei Italiano, allora posta su: > > > >> Microsoft.public.it.office.access > > > >> oppure > > > >> it.comp.appl.access > > > >> sono due ottimi NewsGroup in italiano. > > > >> -- > > >> Ciao > > >> Geppo > > > > Ciao Geppo, > > > grazie della tua risposta, ma mi da errore 424 oggetto richiesto... > > > che faccio! > > > > Stefano. > > > In che punto del codice ti da l'errore? > > > Comunque accertati che i nomi dei controlli siano scritti in modo corret= to. > > > -- > > Ciao > > geppo > > In questo punto: > > If Not IsNull(DLookup("[Ragione_sociale]", "tblEsercenti", _ > "[Ragione_sociale]=3D" & Chr$(34) & Me.Ragione_sociale.Value & Chr > $(34))) _ > And Me.Ragione_sociale.Value <> > Nz(Ragione_sociale.Value.OldValue) Then > > Per i nomi sui controlli credo non siano scritti bene... boo!? > > Grazie comunque, > Stefano. No, no! ho risolto... scusa ora mi funziona ho tolto le parentisi quadre =E8 ora va bene. Ti ringrazio veramente molto, per il tuo aiuto. Ciao Geppo! Stefano.

Ciao riccifs@tin.it wrote: > On 1 Dic, 20:07, ricc...@tin.it wrote: >> On 1 Dic, 19:41, "geppo" <c...@tin.it.invalid> wrote: >> >> >> >>> Ciao ricc...@tin.it wrote: >>>> On 1 Dic, 18:29, "geppo" <c...@tin.it.invalid> wrote: >>>>> Ciao ricc...@tin.it wrote: >> >>>>> ---cut--- >> >>>>> prova cosi aggiugendo delle apici singole se Ragione_Sociale � >>>>> tipo testo: >> >>>>>> Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) >> >>>>> If Not IsNull(DLookup("[Ragione Sociale]", "tblEsercenti", _ >>>>> "[Ragione sociale]=" & Chr$(34) & Me.Ragione_sociale.Value & >>>>> Chr$(34))) _ And Me.Ragione_sociale.Value <> >>>>> Nz(Ragione_sociale.Value.OldValue) Then Cancel = True >>>>> MsgBox "Duplicate data!" >>>>> Me.Ragione_sociale.Undo >>>>> End If >> >>>>>> End Sub >> >>>>> Oppure dai un occhiata qui � il sito da cui ho appreso il codice >>>>> suddetto: >> >>>>> http://www.donkarl.com/it/FAQ/FAQ4Maschere.htm#4.25 >> >>>>>> I hope you will understand it, they are in Italian. >> >>>>>> Many Thanks for your help!, >>>>>> Stefano. >> >>>>> sei Italiano, allora posta su: >> >>>>> Microsoft.public.it.office.access >> >>>>> oppure >> >>>>> it.comp.appl.access >> >>>>> sono due ottimi NewsGroup in italiano. >> >>>>> -- >>>>> Ciao >>>>> Geppo >> >>>> Ciao Geppo, >>>> grazie della tua risposta, ma mi da errore 424 oggetto richiesto... >>>> che faccio! >> >>>> Stefano. >> >>> In che punto del codice ti da l'errore? >> >>> Comunque accertati che i nomi dei controlli siano scritti in modo >>> corretto. >> >>> -- >>> Ciao >>> geppo >> >> In questo punto: >> >> If Not IsNull(DLookup("[Ragione_sociale]", "tblEsercenti", _ >> "[Ragione_sociale]=" & Chr$(34) & Me.Ragione_sociale.Value & Chr >> $(34))) _ >> And Me.Ragione_sociale.Value <> >> Nz(Ragione_sociale.Value.OldValue) Then >> >> Per i nomi sui controlli credo non siano scritti bene... boo!? >> >> Grazie comunque, >> Stefano. > > No, no! ho risolto... scusa ora mi funziona ho tolto le parentisi > quadre � ora va bene. > Ti ringrazio veramente molto, per il tuo aiuto. Di nulla, figurati. p.s.: se hai bisogno posta sui newsgroup che ti ho segnalato, ci sono ragazzi davvero forti. > > Ciao Geppo! > Stefano. Ciao Stefano Geppo

I do not understand Italian, so I do not know if you found an answer in this thread from your conversation with geppo or not? -- Ken Snell <MS ACCESS MVP> <riccifs@tin.it> wrote in message news:180f0b28-fa86-4e50-a646-b7e5929a5407@b15g2000hsa.googlegroups.com... > On 1 Dic, 17:48, "Ken Snell $MVP$" > <kthsneisll...@ncoomcastt.renaetl> wrote: >> The code I posted uses generic names. Post the code that you're trying to >> use so that we can see the actual names and how you've constructed the >> code. >> >> -- >> >> Ken Snell >> <MS ACCESS MVP> >> >> <ricc...@tin.it> wrote in message >> >> news:7f3c7414-f33f-4636-9131-3f80aa6bc395@v4g2000hsf.googlegroups.com... >> >> > On 30 Nov, 22:12, "Ken Snell $MVP$" >> > <kthsneisll...@ncoomcastt.renaetl> wrote: >> >> Use the control's BeforeUpdate event to check your table's data (code >> >> sample >> >> below assumes the field is a numeric data type): >> >> >> Private Sub NameOfTextbox_BeforeUpdate(Cancel As Integer) >> >> If DCount("*", "NameOfYourTable", "NameOfFieldBeingChecked=" & _ >> >> Me.NameOfTextbox.Value) > 0 Then >> >> Cancel = True >> >> MsgBox "Duplicate data!" >> >> Me.NameOfTextbox.Undo >> >> End If >> >> End Sub >> >> >> -- >> >> >> Ken Snell >> >> <MS ACCESS MVP> >> >> >> "KimTong via AccessMonster.com" <u35279@uwe> wrote in >> >> messagenews:7c00cb7a836f1@uwe... >> >> >> > Dear all, >> >> >> > Can I do check duplicate using VBA when user enter data in a certain >> >> > field? >> >> > If the data that tuser entered was already in the system, give a >> >> > message >> >> > 'Duplicate data' and the user have to enter a new data. >> >> >> > Thank you in advance. >> >> >> > KT >> >> >> > -- >> >> > Message posted via AccessMonster.com >> >> >http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200711/1 >> >> > Hi Ken, >> > I was trying to use your code to check for duplicates entry. But it's >> > giving to me an error like this "missing query operator..." >> > What I'm doing wrong? >> >> > Many Thanks. >> > Stefano. > > Hi Ken, > I copied and pasted your code as you posted and I changed it with my > name. > > Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) > If DCount("*", "tblEsercenti", "Ragione_sociale=" & _ > Me.Ragione_sociale.Value) > 0 Then > Cancel = True > MsgBox "Duplicate data!" > Me.Ragione_sociale.Undo > End If > End Sub > > I hope you will understand it, they are in Italian. > > Many Thanks for your help!, > Stefano.

On 2 Dic, 00:23, "Ken Snell $MVP$" <kthsneisll...@ncoomcastt.renaetl> wrote: > I do not understand Italian, so I do not know if you found an answer in this > thread from your conversation withgeppoor not? > > -- > > Ken Snell > <MS ACCESS MVP> > > <ricc...@tin.it> wrote in message > > news:180f0b28-fa86-4e50-a646-b7e5929a5407@b15g2000hsa.googlegroups.com... > > > On 1 Dic, 17:48, "Ken Snell $MVP$" > > <kthsneisll...@ncoomcastt.renaetl> wrote: > >> The code I posted uses generic names. Post the code that you're trying to > >> use so that we can see the actual names and how you've constructed the > >> code. > > >> -- > > >> Ken Snell > >> <MS ACCESS MVP> > > >> <ricc...@tin.it> wrote in message > > >>news:7f3c7414-f33f-4636-9131-3f80aa6bc395@v4g2000hsf.googlegroups.com... > > >> > On 30 Nov, 22:12, "Ken Snell $MVP$" > >> > <kthsneisll...@ncoomcastt.renaetl> wrote: > >> >> Use the control's BeforeUpdate event to check your table's data (code > >> >> sample > >> >> below assumes the field is a numeric data type): > > >> >> Private Sub NameOfTextbox_BeforeUpdate(Cancel As Integer) > >> >> If DCount("*", "NameOfYourTable", "NameOfFieldBeingChecked=" & _ > >> >> Me.NameOfTextbox.Value) > 0 Then > >> >> Cancel = True > >> >> MsgBox "Duplicate data!" > >> >> Me.NameOfTextbox.Undo > >> >> End If > >> >> End Sub > > >> >> -- > > >> >> Ken Snell > >> >> <MS ACCESS MVP> > > >> >> "KimTong via AccessMonster.com" <u35279@uwe> wrote in > >> >> messagenews:7c00cb7a836f1@uwe... > > >> >> > Dear all, > > >> >> > Can I do check duplicate using VBA when user enter data in a certain > >> >> > field? > >> >> > If the data that tuser entered was already in the system, give a > >> >> > message > >> >> > 'Duplicate data' and the user have to enter a new data. > > >> >> > Thank you in advance. > > >> >> > KT > > >> >> > -- > >> >> > Message posted via AccessMonster.com > >> >> >http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200711/1 > > >> > Hi Ken, > >> > I was trying to use your code to check for duplicates entry. But it's > >> > giving to me an error like this "missing query operator..." > >> > What I'm doing wrong? > > >> > Many Thanks. > >> > Stefano. > > > Hi Ken, > > I copied and pasted your code as you posted and I changed it with my > > name. > > > Private Sub Ragione_sociale_BeforeUpdate(Cancel As Integer) > > If DCount("*", "tblEsercenti", "Ragione_sociale=" & _ > > Me.Ragione_sociale.Value) > 0 Then > > Cancel = True > > MsgBox "Duplicate data!" > > Me.Ragione_sociale.Undo > > End If > > End Sub > > > I hope you will understand it, they are in Italian. > > > Many Thanks for your help!, > > Stefano. Hi Ken, with the help of Geppo I finally got a solution for my problem. Many thanks the same for your interest about it, I really appreciate that! Bye, Stefano.

Hi Ken, I just to run your script, but the message said "Data Type mismatch" on this part: If DCount("*", "Roger", "AWB=" & _ Me.AWB.Value) > 0 Then I am sure I have the same data type between those 2 fields. Do you know why it happened like that? KF Ken Snell (MVP) wrote: >Use the control's BeforeUpdate event to check your table's data (code sample >below assumes the field is a numeric data type): > >Private Sub NameOfTextbox_BeforeUpdate(Cancel As Integer) >If DCount("*", "NameOfYourTable", "NameOfFieldBeingChecked=" & _ > Me.NameOfTextbox.Value) > 0 Then > Cancel = True > MsgBox "Duplicate data!" > Me.NameOfTextbox.Undo >End If >End Sub > >> Dear all, >> >[quoted text clipped - 6 lines] >> >> KT -- Message posted via AccessMonster.com http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200712/1

Ciao KimTong via AccessMonster.com wrote: > Hi Ken, > > I just to run your script, but the message said "Data Type mismatch" > on this part: > > If DCount("*", "Roger", "AWB=" & _ > Me.AWB.Value) > 0 Then > > I am sure I have the same data type between those 2 fields. Do you > know why it happened like that? > > KF > but AWB that type of data contains? If it is then type text you have to write her/it this way: If DCount("*", "Roger", "AWB='" & Me.AWB.Value &"'") > 0 Then -- Ciao Geppo

It works. Thank you very much Geppo geppo wrote: >> Hi Ken, >> >[quoted text clipped - 8 lines] >> >> KF > >but AWB that type of data contains? > >If it is then type text you have to write her/it this way: > >If DCount("*", "Roger", "AWB='" & Me.AWB.Value &"'") > 0 Then > -- Message posted via AccessMonster.com http://www.accessmonster.com/Uwe/Forums.aspx/access-formscoding/200712/1

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