procedure TfrmPayment.LoadPayments;
var 
  i, j: integer; 
  aPayment: TPayment;
  begin 
  FBalance := 150; 
  FBondBalance := 250;

  for i := 0 to 4 do 
  begin 
    for j := 0 to 2 do 
    begin 
      aPayment := TPayment.Create; 
     aPayment.Staff     := 'Dick Walker'; 
      aPayment.Tender    := 'CASH'; 
      aPayment.Customer  := 'Mike Smith'; 
        aPayment.IsBond    := false; 
      aPayment.NewPayment := false; 
      FPaymentList.Add(aPayment); 
    end; 
  end;
end; 
// ArrayList loaded with data before being bound.

最关键的是  arraylist  是静态的,它的元素类型是  system.object,绑定时要转化为对象数组类型  dgPayments.DataSource=(TPayment[])arrayList.ToArray(typeof(TPayment));