unit1.pas

学生选课是高校教务管理工作的一部分

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DB, DBTables, StdCtrls,unit2,unit3;

type
  TFormLogin = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    Button1: TButton;
    Query1: TQuery;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  FormLogin: TFormLogin;

implementation



{$R *.dfm}

procedure TFormLogin.Button1Click(Sender: TObject);
var user,pass:String;
begin
 user:=Edit1.Text;
 pass:=Edit2.Text;
 Query1.SQL.Text:='Select * From 密码.db Where 学号 = "'+user+'"';
 Query1.Open;
 if pass=Query1.FieldByName('密码').AsString then
 begin
    Query1.Close;
    FormLogin.Hide;
    if user='0000' then
    begin
    FormMaster.Init;
     FormMaster.Show;
    end
    else
    begin
      FormStuMain.User:=user;
      FormStuMain.Init;
      FormStuMain.Show;
    end;
        end
      else
        begin
            Query1.Close;
            ShowMessage(' 密码错误！');
       end;
end;

end.