1. .
2. (- DMod) TQuery, TDataSource.
3. TQuery :
DatabaseName- .
Name AnimalsQuery
SQL select * from Animals
Active-True
( RequestLive -True)
4. TDataSource :
Name-AnimalsSource
DataSet-AnimalsQuery
5. TQuery Fields Editor. Add Field. , .
6. . New Field. New Field Name Mass, Integer Calculated
7. , AnimalsQuery.
8. OnCalcField:
void __fastcall TDMod::AnimalsQueryCalcField(TDataSet *DataSet)
{
AnimalsQuerymass->AsInteger=
AnimalsQuerySIZE->AsInteger*AnimalsQueryWEIGHT->AsInteger;
}
9. .
10. TPanel, TButton.
11. TDBImage TDBGrid .
12. : NAME, SIZE, WEIGHT, MASS. Columns Editor .
13. .
14. TDBImage BMP.( DataSource, DataField)
15. Modify Field. ( Name-ModifyBtn)
void __fastcall TForm1::ModifyBtnClick(TObject *Sender)
{
int i;
AnsiString S;
DMod->AnimalsQuery->Edit();
i = DMod->AnimalsQuerySIZE->Value;
S = DMod->AnimalsQueryNAME->Value;
i += 1;
S = "FFF";
DMod->AnimalsQuerySIZE->Value = i;
DMod->AnimalsQueryNAME->Value = S;
}
16. Cancel Modify Field :
void __fastcall TForm1::Button2Click(TObject *Sender)
{
Dmod->AnimalsQuery->Cancel();
}
17. . .
