public async Task <dynamic> OnGetCourseHomeworkAsync(int courseID, string token)
        {
            try
            {
                var t = await tokenService.GetTokenAsync(token);

                if (t == null)
                {
                    throw new Exception("请先登录");
                }
                var role = t.Role;
                if (role != UserRole.Admin)
                {
                    role = await homeworkService.GetCourseRoleAsync(courseID, t.UserID);
                }
                if (role == UserRole.Student)
                {
                    var hwList = await homeworkService.GetCourseHomeworkOverviewAsync(t.UserID, courseID);

                    return(new { Res = true, HWList = hwList });
                }
                else
                {
                    var hwList = await homeworkService.GetCourseHomeworkOverviewTAsync(courseID);

                    return(new { Res = true, HWList = hwList });
                }
            }
            catch (Exception e)
            {
                return(new { Res = false, Error = e.Message });
            }
        }