public JsonResult GetTeacherID(long TopicID)
        {
            ResultInfo <StudentRateLesson> ResultInfo = new ResultInfo <StudentRateLesson>()
            {
                Status      = false,
                Description = "Failed|Login"
            };
            SchoolStudent     pageobj = new SchoolStudent();
            StudentRateLesson assign  = new StudentRateLesson();

            if (TopicID > 0)
            {
                assign.SubjectID = pageobj.GetSubIdByTopicID(TopicID);
                if (assign.SubjectID > 0)
                {
                    assign.TeacherID = pageobj.GetTeacherIDBySubID(assign.SubjectID);
                }
            }
            ResultInfo.Info = assign;
            return(Json(ResultInfo, JsonRequestBehavior.AllowGet));
        }