unit13.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 Unit13;

interface

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

type
  TForm13 = class(TForm)
    ADOQuery1: TADOQuery;
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    Label1: TLabel;
    Edit1: TEdit;
    Label2: TLabel;
    Edit2: TEdit;
    Label3: TLabel;
    Edit3: TEdit;
    Label4: TLabel;
    Edit4: TEdit;
    Button1: TButton;
    Label5: TLabel;
    procedure FormShow(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form13: TForm13;

implementation

{$R *.dfm}

procedure TForm13.FormShow(Sender: TObject);
begin
ADOQuery1.close;
ADOQuery1.SQL.Clear;
ADOQuery1.SQL.add('select 用户ID,用户姓名,学号,专业 from login ');
Adoquery1.Open;
end;

procedure TForm13.Button1Click(Sender: TObject);
begin
ADOQuery1.close;
ADOQuery1.SQL.Clear;
ADOQuery1.SQL.add('insert into login values (:用户ID,:用户密码,:用户姓名,:学号,:专业)');
ADOQuery1.Parameters.ParamByName('用户ID').Value:=Edit1.Text;
ADOQuery1.Parameters.ParamByName('用户密码').Value:='000';
ADOQuery1.Parameters.ParamByName('用户姓名').Value:=Edit2.Text;
ADOQuery1.Parameters.ParamByName('学号').Value:=Edit3.Text;
ADOQuery1.Parameters.ParamByName('专业').Value:=Edit4.Text;
ADOQuery1.ExecSQL;
ADOQuery1.close;
ADOQuery1.SQL.Clear;
ADOQuery1.sql.text:='select 用户ID,用户姓名,学号,专业 from login';
edit1.Text:='';
edit2.Text:='';
edit3.Text:='';
edit4.Text:='';

ADOQuery1.open;
end;

end.