内存表 ClientDataSet CreateDataSet

unit Form_Main;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DB, Grids, DBGrids, DBClient;
 
type
  TForm1 = class(TForm)
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    ClientDataSet1: TClientDataSet;
    procedure FormCreate(Sender: TObject);
  private
 
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.FormCreate(Sender: TObject);
var
  i: Integer;
begin
  with ClientDataSet1 do
  begin
    FieldDefs.Add('ID', ftInteger, , False);
    FieldDefs.Add('Name', ftString, , False);
    FieldDefs.Add('Gender', ftInteger, , False);
    FieldDefs.Add('Age', ftInteger, , False);
    IndexDefs.Add('PK', 'ID', [ixPrimary, ixUnique]);
    CreateDataSet;
    DisableControls;
    for i :=  to  do
    begin
      Append;
      FieldByName('ID').AsInteger := i;
      FieldByName('Name').AsString := 'User' + IntToStr(i);
      FieldByName('Gender').AsInteger := Random();
      FieldByName('Age').AsInteger := Random();
      Post;
    end;
    EnableControls;
  end;
end;
 
end.

procedure TFormMain.FormCreate(Sender: TObject);
begin
  self.ClientDataSet1.FieldDefs.Add('Name',ftString,50);
  self.ClientDataSet1.FieldDefs.Add('Age',ftString,50);
  self.ClientDataSet1.CreateDataSet;
 
  self.ClientDataSet1.AppendRecord(['100','100']);
  self.ClientDataSet1.AppendRecord(['100','100']);
  self.ClientDataSet1.AppendRecord(['100','100']);
  self.ClientDataSet1.AppendRecord(['100','100']);
  self.ClientDataSet1.AppendRecord(['100','100']);
  self.ClientDataSet1.AppendRecord(['100','100']);
  self.DataSource1.DataSet:=self.ClientDataSet1;
end;
 
 
procedure TFormMain.BitBtn1Click(Sender: TObject);
begin
self.ClientDataSet1.AppendRecord(['1001','100']);//添加新纪录
self.ClientDataSet2.Data:=self.ClientDataSet1.Delta;
self.DataSource1.DataSet:=self.ClientDataSet2;
end;