:-) Sorry if I made things complicated now...

Lets take it in little pills (easier to swallow) ;-)

Assuming everything is set ok (Combos ParamNames match query param
names, etc) is there a particular reason for the Combos refuse to set
a value?
Explaining: Now I can see the combos are filled, but when click a
value in the list, nothing goes to the edit box, it stays blank. It's
like a read only field or something.

Thanks for the patience.
Alexandre.

--- In IBObjects@yahoogroups.com, Helen Borrie <helebor@...> wrote:
>
> At 04:00 PM 11/05/2006, you wrote:
>
> >Hello Helen!
> >
> >It's always a priviledge to talk to people who knows what they're
> >doing. ;-)
> >All the tips were great. But, I'm afraid I've left out some important
> >information in order to simplify things.
> >
> >Here goes the whole story:
> >
> >The "main" table here is indeed a detail from a master-detail,
> >connected via MasterLinks (although this may not do any difference).
> >
> >The real table has 3 date fields and 2 foreign keys, any of these
> >folks may be "parameterized" and that's the origin of my use of
> >SQLWhereItems/InvalidateSQL.
> >
> >The complete OnPrepareSQL follows:
>
>//---------------------------------------------------------------------------
> >void __fastcall TFormCadInstalacoes::IB_QueryOcorrenciasPrepareSQL(
> > TIB_Statement *Sender)
> >{
> > AnsiString fieldName;
> >
> > switch (ListBoxDateFields->ItemIndex) {
> >
> > case 0: fieldName = "DATA_ENTRADA";
> > break;
> > case 1: fieldName = "DATA_RECONHECIMENTO";
> > break;
> > case 2: fieldName = "DATA_ATENDIMENTO";
> > break;
> > }
> >
> > IB_QueryOcorrencias->SQLWhereItems->Add(fieldName + " >=
> >:data_inicial");
> > IB_QueryOcorrencias->SQLWhereItems->Add(fieldName + " <=
> >:data_final");
> >
> > if (IB_CBClasseOcorrencia->ItemIndex != -1)
> > IB_QueryOcorrencias->SQLWhereItems->Add("id_classe_ocorrencia
> >= :id_classe_ocorrencia");
> >
> > if (IB_CBCodigoOcorrencia->ItemIndex != -1)
> > IB_QueryOcorrencias->SQLWhereItems->Add("id_ocorrencia =
> >:id_ocorrencia");
> >
> >}
>
>//---------------------------------------------------------------------------
> >
> >The tricky part is that the date fields are working but the Combos
> >don't. I didn't found many docs about the use of these features but
> >may be I'm missing the right ordering of events (or perhaps just
> >completely lost and confused %-).
>
> Well, now you're not the only one. :-)
>
> But - the main thing to keep in mind is that the ParamName property
> of the combobox has to be the _Name_ of a parameter in the main query
> that the combobox's Datasource property points to. So, it follows,
> that a parameter of that _Name_ must exist in the WHERE clause. The
> ParamName in your previous details, which would resolve to {one of }
> ItemValues[], didn't look anything like a date field....ID_CLASSE
is a string.
>
> Helen
>