Problem with NewValue and OldValue

[rpelisson]

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]

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.

[rpelisson]

Oppsss, ok !

I'm post in english...

=)

[gto]

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

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De nada =)
Tente postar em inglês, aí todo mundo entende.
Galera fica meio braba por aqui se postar em português.. só por PM