unit7.pas

学生成绩管理系统

unit Unit7;

interface

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

type
  Tgradearea = class(TForm)
    Panel1: TPanel;
    Panel2: TPanel;
    Table1: TTable;
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    GroupBox3: TGroupBox;
    GroupBox4: TGroupBox;
    Edit1: TEdit;
    Edit2: TEdit;
    Button3: TButton;
    GroupBox5: TGroupBox;
    Button4: TButton;
    Edit3: TEdit;
    Edit4: TEdit;
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  gradearea: Tgradearea;

implementation

{$R *.dfm}

procedure Tgradearea.FormClose(Sender: TObject; var Action: TCloseAction);
begin
action:=cafree;
end;

procedure Tgradearea.Button3Click(Sender: TObject);
begin
table1.CancelRange ;
table1.IndexName :='av';
table1.SetRange([edit1.Text ],[edit2.Text ]);
end;

procedure Tgradearea.Button4Click(Sender: TObject);
begin
table1.CancelRange ;
 table1.IndexName :='su';
table1.SetRange([edit3.Text ],[edit4.Text ]);
end;

end.