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内存表 ClientDataSet CreateDataSet

时间:2015-05-31 01:25:36      阅读:449      评论:0      收藏:0      [点我收藏+]

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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, 0, False);
    FieldDefs.Add(Name, ftString, 10, False);
    FieldDefs.Add(Gender, ftInteger, 0, False);
    FieldDefs.Add(Age, ftInteger, 0, False);
    IndexDefs.Add(PK, ID, [ixPrimary, ixUnique]);
    CreateDataSet;
    DisableControls;
    for i := 1 to 1000 do
    begin
      Append;
      FieldByName(ID).AsInteger := i;
      FieldByName(Name).AsString := User + IntToStr(i);
      FieldByName(Gender).AsInteger := Random(2);
      FieldByName(Age).AsInteger := Random(100);
      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;

内存表 ClientDataSet CreateDataSet

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原文地址:http://www.cnblogs.com/chenmfly/p/4541379.html

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