/// <summary>
        /// 返回一个学生选题主页面
        /// </summary>
        /// <returns></returns>
        public ActionResult Index()
        {
            var            bll      = new StudentBll();
            string         account  = Session["account"].ToString();
            long           thesisid = bll.QueryThesisId(account);
            List <string>  list     = bll.QueryTeacherOpinionBll(account, thesisid);
            PersonalThesis thesis   = bll.QueryThesisInfo(account);

            thesis = thesis ?? new PersonalThesis(-1, "", "", "", "");
            int[] weight     = bll.QueryThesisStatus(thesisid);
            int   passWeight = Convert.ToInt32(HttpContext.Application["pastWeight"]);

            #region 论题状态判断
            string thesisStatus = "";
            if (weight[0] < 1)
            {
                thesisStatus = "暂时没有课题信息";
            }
            else if (weight[0] > 0 && weight[1] < passWeight)
            {
                thesisStatus = "课题审核中";
            }
            else if (weight[1] >= passWeight)
            {
                thesisStatus = "课题审核通过";
            }
            else if (weight[0] == passWeight && weight[1] < passWeight)
            {
                thesisStatus = "审核不通过";
            }
            #endregion
            ViewBag.status     = thesisStatus;
            ViewBag.thesisInfo = thesis;
            ViewBag.advertise  = list;
            ViewBag.username   = bll.GetName(account);
            ViewBag.sno        = account;
            return(View());
        }