unit15.~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 Unit15;

interface

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

type
  TForm15 = class(TForm)
    DataSource1: TDataSource;
    ADOQuery1: TADOQuery;
    DBGrid1: TDBGrid;
    Label1: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Label3: TLabel;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form15: TForm15;

implementation

{$R *.dfm}

procedure TForm15.Button1Click(Sender: TObject);
begin
ADOQuery1.close;
ADOQuery1.SQL.Clear;
ADOQuery1.SQL.add('insert into login2 values (:用户ID,:用户密码,:用户姓名)');
ADOQuery1.Parameters.ParamByName('用户ID').Value:=Edit1.Text;
ADOQuery1.Parameters.ParamByName('用户密码').Value:='0000';
ADOQuery1.Parameters.ParamByName('用户姓名').Value:=Edit2.Text;
ADOQuery1.ExecSQL;
ADOQuery1.close;
ADOQuery1.SQL.Clear;
ADOQuery1.sql.text:='select 用户ID,用户姓名 from login2';
edit1.Text:='';
edit2.Text:='';
ADOQuery1.open;
end;

procedure TForm15.FormShow(Sender: TObject);
begin
ADOQuery1.close;
ADOQuery1.SQL.Clear;
ADOQuery1.SQL.add('select 用户ID,用户姓名 from login2 ');
Adoquery1.Open;
end;

end.