unit4.~pas

用户可选择不同权限进入系统。当以管理员权限进入系统时

unit Unit4;

interface

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

type
  TForm4 = class(TForm)
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    ADOQuery1: TADOQuery;
    ADOQuery2: TADOQuery;
    Button1: TButton;
    Label1: TLabel;
    procedure FormShow(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    


  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form4: TForm4;

implementation

uses Unit1, Unit2;

{$R *.dfm}

procedure TForm4.FormShow(Sender: TObject);
var
temp:string;
begin
ADOQuery2.close;
ADOQuery2.SQL.Clear;
ADOQuery2.SQL.Text:='select 学号 from login where 用户ID='+form1.edit1.text+'';
Adoquery2.Open;
temp:=adoquery2.FieldByName('学号').AsString;
ADOQuery1.close;
ADOQuery1.SQL.Clear;
ADOQuery1.SQL.add('select * from achievements where 学号='+temp+'');
Adoquery1.Open;
end;



procedure TForm4.Button1Click(Sender: TObject);
begin
form2.show;
form4.Hide;
end;

end.