ASP.NET-三元运算符工作不正常？

我希望根据记录的存在更改注册状态。但是，我当前的语法功能不正常。我有一个记录，应该显示“未滚动”作为状态，但它没有。它只进入“未注册”状态

其他信息：我尝试重新洗牌三元运算符，它只对第一个运算符有效，忽略了中间的条件。就像在我下面的代码中一样，它只会正确地应用“已注册”状态，其余的只会被完全忽略其他2个条件的“未注册”

方法如下：

    // GET: Enrollment
    public ActionResult Enrollment()
    {
        //Query for Children
        var children = from x in db.child_t
                       select new ViewModels.ChildViewModel
                       {
                           child_id = x.child_id,
                           last_name = x.last_name,
                           first_name = x.first_name,
                           middle_name = x.middle_name,
                           ext_name = x.ext_name,
                           sex = x.sex,
                           birthdate = x.birthdate,
                           sibling_status = ((from s in db.sibling_t where (s.child_id == x.child_id) select s).Count() > 0),
                           child_survey_status = ((from cs in db.child_survey_t where (cs.child_id == x.child_id) select cs).Count() > 0),
                           parent_status = ((from tp in db.tn_child_parent_t where (tp.child_id == x.child_id) select tp).Count() > 0),
                           home_status = ((from h in db.home_t where (h.child_id == x.child_id) select h).Count() > 0),
                           enrollment_status =
                            (

                              (from h in db.tn_enrollment_t
                                where (h.child_id == x.child_id && h.enrollment_date != null && h.unenrollment_date == null && h.completed_date == null)
                                orderby h.enrollment_date descending
                                select h).FirstOrDefault() != null ? "Enrolled" :

                              (from h in db.tn_enrollment_t
                               where (h.child_id == x.child_id && h.enrollment_date != null && h.unenrollment_date != null && h.completed_date == null)
                               orderby h.enrollment_date descending
                               select h).FirstOrDefault() != null ? "Unenrolled" :

                              (from h in db.tn_enrollment_t
                               where (h.child_id == x.child_id && h.enrollment_date != null && h.unenrollment_date == null && h.completed_date != null)
                               orderby h.enrollment_date descending
                               select h).FirstOrDefault() != null ? "Completed" : 

                               "Not Enrolled"
                            ),
                           program_id =
                            ((from p in db.tn_enrollment_t
                                where (p.child_id == x.child_id)
                                orderby p.enrollment_date descending
                                select p.program_id).FirstOrDefault())
                       };

        return View(children.ToList());


    }

下图中的第一条记录应为已处于“未滚动”状态的记录。

为了清楚地说明我的注册状态的条件：

---

hi为什么不在linq中使用case？它将是一个查询并且更具可读性？您可以为您认为必须为“unrolled”的记录指定

tn\u incrolment\t

的字段值吗？@YashveerSingh将尝试处理该记录！到目前为止，这是我想到的第一种实现此类条件的方法。@S.Serp已将其作为编辑放置！