Problem with NewValue and OldValue

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rpelisson
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Problem with NewValue and OldValue

Postby rpelisson » 22.11.2006, 18:04

Hi !

When I'm using them command NewValue for verify the OldValue for the Field, the returned value from NewValue it's different of write.

Example, in a table PARCELAS exists a record with this fields:
DUPLICATA: 000001
VENCIMENTO: 20/01/2005

If I want to verify, on a event TDBGrid.OnColExit if the new value (wrote) for the Field VENCIMENTO was different from OldValue (from the record)

Code: Select all


If (Table1.FieldByName('Vencimento').NewValue<>Table1.FieldByName('Vencimento').OldValue) Then
  Showmessage('Different')
Else
  Showmessage('Equal!');


gto
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Postby gto » 22.11.2006, 18:49

I've never used the OldValue and NewValue, but you can use the OnSetText method of the field instead. (into the table/query, click on the field, event, onSetText).

There, you can see when a new value will be setted to the field, accessing the new value via the Value constant (defined in onSetText) and accessing the old value as you normally do, QueryNameFieldName.Value or QueryName.FieldByName('FieldName').AsSomeType.
Use the FU!!!!!IN Google !

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rpelisson
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Thanks

Postby rpelisson » 22.11.2006, 20:31

Oppsss, ok !

I'm post in english...

=)
Last edited by rpelisson on 23.11.2006, 11:03, edited 1 time in total.

gto
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Re: Thanks

Postby gto » 22.11.2006, 20:34

rpelisson wrote:GTO, valeu carinha.

Eu também uso o Value, é que o pessoal utilizava isso em BDE, então. Já viu!


You're welcome =)
Ahm, try to keep it in english, so everybody can understand ;)

---

De nada =)
Tente postar em inglês, aí todo mundo entende.
Galera fica meio braba por aqui se postar em português.. só por PM ;)
Use the FU!!!!!IN Google !

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Te Amo Taís!


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