how do I access fields from OnCalcFields

[albourgz]

c++ builder xe10
in .h I have

Code: Select all

TField *fQTIN;

in cpp:

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fQTIN=NULL;
QUniQuery->SQL->Text="SELECT ID, GETVALUEFUNCTION(ID) as QTYIN FROM atable";
QUniQuery->Active=true;
...
void __fastcall TForm1::QUniQueryCalcFields(TDataSet *DataSet)
{
    if (fQTIN==NULL) { fQTIN=DataSet->FieldByName("QTYIN");   }
}

¨

Problem: I get an exeception on fQTIN=DataSet->FieldByName("QTYIN"); (field not found).
Why why why?

[MaximG]

Please specify how you create a calculated field . Do you create data fields for the ID and QTYIN attributes? Please provide a full code sample demonstrating TFields creation of the QUniQuery query in your project.