frm_loginu.pas

小区物业管理系统是为小区管理者更好的维护小区各项业务处理工作而开发的管理软件

unit frm_loginU;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls,frm_mainU,Db,AdoDb,Config, Mask;

type
  Tfrm_login = class(TForm)
    Panel1: TPanel;
    Panel2: TPanel;
    btn_ok: TButton;
    btn_cancel: TButton;
    edt_user: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    edt_pwd: TMaskEdit;
    procedure btn_cancelClick(Sender: TObject);
    procedure btn_okClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    Try_times:integer;//记录用户输入错误次数
  public
  end;

var
  frm_login: Tfrm_login;

implementation
uses DataMU,ClassesU,Control_OperatorU;
{$R *.dfm}

procedure Tfrm_login.btn_cancelClick(Sender: TObject);
begin
Application.Terminate;
end;

procedure Tfrm_login.btn_okClick(Sender: TObject);
var
  operator:TOperator;
  operatorID:integer;
begin
if (edt_user.Text='') then
  begin
    MessageBox(Handle, '用户名不能为空', '信息', MB_ICONASTERISK);
    exit;
  end;
//启动数据库连接
if(not DataM.ADOCon.Connected) then
  begin
    DataM.ADOCon.ConnectionString:=TXQWYConfig.getConnectionStr;
    DataM.ADOCon.Open;
  end;
operator:=Toperator.Create;
operator.OperatorName:=edt_user.Text;
operator.pwd:=edt_pwd.Text;
operatorID:=Control_OperatorU.CheckOperator(operator);
//若用户名密码匹配成功
if operatorID<>-1 then
    begin
      frm_main.userID:=operatorID;  //保存当前登录用户的标识
      frm_main.Show; //打开程序主窗口
      self.Close;  //关闭登录窗口
    end
  else  //否则，提示错误，并记录错误次数
    begin
      MessageBox(Handle, '用户名和密码不对', '小区物业', MB_ICONEXCLAMATION);
      inc(Try_times); //用户输入密码次数加1
      if Try_times=3 then
        begin
          MessageBox(Handle, '输入错误超过3次，系统关闭', '小区物业', MB_ICONEXCLAMATION);
          frm_main.Close;
        end;
    end;
end;

procedure Tfrm_login.FormCreate(Sender: TObject);
begin
//初始化记录用户输入错误次数
Try_times:=0;
end;

end.