用户登录信息检测

  ////存储用户登录信息
        private UserInfo _GustUserDynamicInfor;

        public UserInfo GustUserDynamicInfor
        {
            get
            {
                if (_GustUserDynamicInfor == null)
                {
                    if (Session["GuestUser"] != null)
                    {
                        //判断当前session与Cookies中的UserID是否一致，如果不一致，按照Cookies中的User_ID重新赋价值
                        if (HttpContext.Current.Request.Cookies["GuestUserID"] != null)
                        {
                            if (HttpContext.Current.Request.Cookies["GuestUserID"].Value.Trim().Length > 0)
                            {
                                //不一致
                                if ((Session["GuestUser"] as UserInfo).User_ID.ToString() != HttpContext.Current.Request.Cookies["GuestUserID"].Value.Trim())
                                {
                                    _GustUserDynamicInfor = (new User()).GetUserInfoByUser_ID(Convert.ToInt32(HttpContext.Current.Request.Cookies["GuestUserID"].Value));
                                    Session["GuestUser"] = _GustUserDynamicInfor;
                                }
                            }
                        }

                        if (_GustUserDynamicInfor == null)
                        {
                            _GustUserDynamicInfor = Session["GuestUser"] as UserInfo;
                        }
                    }
                    else
                    {
                        //Session["PortalUser"] = (new Com.Netmarch.BLL.User()).GetUserInfoByUser_Accounts("Michael1");

                        //_portalDynamicInfor = Session["PortalUser"] as UserInfo;
                        if (HttpContext.Current.Request.Cookies["GuestUserID"] != null)
                        {
                            try
                            {
                                //在多浏览器测试时Convert.ToInt32(HttpContext.Current.Request.Cookies["GuestUserID"].Value)会报错
                                _GustUserDynamicInfor = (new User()).GetUserInfoByUser_ID(Convert.ToInt32(HttpContext.Current.Request.Cookies["GuestUserID"].Value));
                            }
                            catch
                            {
                                //过期该cookies
                                DateTime dtExpires = DateTime.Now.AddHours(-1);
                                Response.Cookies["GuestUserID"].Expires = dtExpires;
                                _GustUserDynamicInfor = null;
                            }
                        }
                        //else
                        //{
                        //    Response.Redirect("/Default.aspx");
                        //}
                    }
                }
                return _GustUserDynamicInfor;

            }
            set
            {
                _GustUserDynamicInfor = value;
            }
        }