Q:如何在執行時期建立計算欄位?
A: 參考下列程式碼:
with FieldDefs do
begin
// Create a calculated TField, assign properties,
// and add to MyTable's field definitions array.
TaxAmount := TFloatField.Create(MyTable);
with TaxAmount do
begin
FieldName := 'TaxAmount';
Calculated := True;
Currency := True; DataSet := MyTable;
Name := MyTable.Name + FieldName;
MyTable.FieldDefs.Add(Name, ftFloat, 0, false);
end;
end;
               (
geocities.com/huanlin_tsai)