🚀 go-pugleaf

Why are you using TDataSet?  I believe TDataSet is an abstract class with
true virtual methods.
This means it should not be instantiated directly since these virutal
methods have not yet been implemented.
Try using TDBDataSet or TTable instead...


Sandi Wijaya wrote in message <3acc6f36_2@dnews>...
>Hello everyone !
>
>I have problem like this :
>
>void __fastcall TDatModMaintFinPeriods::QryFinPeriodBeforePost(
>      TDataSet *DataSet)
>{
>  if (FrmMaintFinPeriods -> WriteMode == "Insert")
>  {
>    Finperiod_up(DataSet);
>  }
>  else
>  {
>    Finperiod_up(FrmMaintFinPeriods->old_record, DataSet);
>  };
>}
>
>void __fastcall TDatModMaintFinPeriods::QryFinPeriodBeforeEdit(
>      TDataSet *DataSet)
>{
>FrmMaintFinPeriods->old_record =  DataSet;
>
>};
>
>I want to save old record before editting record to variable old_record,
How
>should I do because old_record always have the same value with TDataSet
>*DataSet, so I can not access the value before editting.
>
>And I have another Question too,
>
>TDataSet *temp = new TDataSet(NULL);
>
>but it trigs a error that says "Cannot create instance of abstract class
>'TDataSet'". Why it can be happens ? and if  I try to create variable from
>class TQuery, it's working. Anyone could tell me ,please.
>
>
>