fdeldemoclientmain.pas

就是这本书的随书代码。包括《实战Delphi 5.x-分布式多层应用系统篇》

unit fDelDemoClientMain;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  Db, DBClient, MConnect, StdCtrls, ExtCtrls, Grids, DBGrids, DBCtrls;

type
  TForm2 = class(TForm)
    DBNavigator1: TDBNavigator;
    DBGrid1: TDBGrid;
    Panel1: TPanel;
    DBNavigator2: TDBNavigator;
    DBGrid2: TDBGrid;
    Button1: TButton;
    ListBox1: TListBox;
    DCOMConnection1: TDCOMConnection;
    ClientDataSet1: TClientDataSet;
    DataSource1: TDataSource;
    ClientDataSet2: TClientDataSet;
    DataSource2: TDataSource;
    ClientDataSet3: TClientDataSet;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure ClientDataSet1AfterPost(DataSet: TDataSet);
  private
    { Private declarations }
    vBanks : OleVariant;
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.DFM}

procedure TForm2.FormCreate(Sender: TObject);
var
  iCount : Integer;
begin
  vBanks := DCOMConnection1.AppServer.Banks;
  if (VarIsArray(vBanks)) then
  begin
    for iCount := VarArrayLowBound(vBanks, 1) to VarArrayHighBound(vBanks, 1) do
      DBGrid1.Columns.Items[2].PickList.Add(vBanks[iCount]);
  end;
end;

procedure TForm2.Button1Click(Sender: TObject);
var
  iCount : Integer;
begin
  ClientDataset3.Data := ClientDataset1.Delta;
  ClientDataset3.First;
  while not ClientDataset3.Eof do
  begin
    for iCount := 0 to ClientDataset2.FieldCount - 1 do
      if not (VarIsNull(ClientDataset3.Fields[iCount].Value)) then
        ListBox1.Items.Add(ClientDataset3.Fields[iCount].Value);
    ClientDataset3.Next
  end;
  ClientDataSet1.ApplyUpdates(0);
end;

procedure TForm2.ClientDataSet1AfterPost(DataSet: TDataSet);
begin
  ClientDataSet2.Data := ClientDataSet1.Delta;
end;

end.