public ActionResult SearchByStuId(string stuid = "0", int page = 1)
        {
            using (var db = new snzkDataEntities())
            {
                var res = db.findStuByName(stuid, "580001").ToList();
                StuViewModel stu = new StuViewModel
                {
                    pageInfo = new PageInfo { CurrentPage = page, PageSize = pageSize, TotalStu = res.Count() },
                    stuinfo = res.OrderBy(x => x.stuid)
                             .Skip(pageSize * (page - 1))
                              .Take(pageSize),
                };
                return View("Person", stu);
            }
        }