使用 TClientDataSet(1)——

本文来自：万一
本例效果图:

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代码文件:

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, DBGrids, DB, DBClient, StdCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Button1: TButton;
    Button2: TButton;
    ClientDataSet1: TClientDataSet;
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    procedure FormCreate(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{本来可以不写代码, 设置四个属性即可}
procedure TForm1.FormCreate(Sender: TObject);
var
  DataFile: string;
begin
  {获取 CodeGear 共享安装的数据文件: country.xml 的路径}
  DataFile := GetEnvironmentVariable('COMMONPROGRAMFILES');   {C:\Program Files\Common Files}
  DataFile := DataFile + '\CodeGear Shared\Data\country.xml'; {country.cds 也可}

  DBGrid1.DataSource := DataSource1;     {DBGrid 需要连接数据源}
  DataSource1.DataSet := ClientDataSet1; {数据源 DataSource 需要连接数据集}
  ClientDataSet1.FileName := DataFile;   {让数据集 ClientDataSet 关联一个数据文件}

  {打开数据集}
  ClientDataSet1.Active := True; //或 ClientDataSet1.Open;
end;

end.