unit1.~pas

这是一个关于delphi数据库方面的源程序

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    Button1: TButton;
    Query1: TQuery;
    Button2: TButton;
    UpdateSQL1: TUpdateSQL;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Query1UpdateRecord(DataSet: TDataSet;
      UpdateKind: TUpdateKind; var UpdateAction: TUpdateAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
Query1.Open;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Query1.ApplyUpdates;
end;

procedure TForm1.Query1UpdateRecord(DataSet: TDataSet;
  UpdateKind: TUpdateKind; var UpdateAction: TUpdateAction);
begin
if UpdateKind=ukModify then
begin
  UpdateSQL1.Query[UpdateKind].ParamByName('Score').Value:=DataSet.FieldValues['Score'];
  UpdateSQL1.Query[UpdateKind].ParamByName('OLD_LessonName').Value:=DataSet.FieldValues['LessonName'];
  UpdateSQL1.Query[UpdateKind].ParamByName('OLD_Number').Value:=DataSet.FieldValues['Number'];
  UpdateSQL1.ExecSQL(UpdateKind);
end;
Abort;
end;

end.