public async void AddDiscipline(AddSemesterDiscipline model)
        {
            await this.Connection.OpenAsync();

            var com = new MySqlCommand("sp_AddDisToSemester", this.Connection);

            com.CommandType = CommandType.StoredProcedure;
            com.Parameters.AddWithValue("@semesterId", model.SemId);
            com.Parameters.AddWithValue("@disId", model.DisId);
            com.ExecuteNonQuery();
            await this.Connection.CloseAsync();
        }
        public JsonResult AddDiscipline(AddSemesterDiscipline model)
        {
            this.semestersService.AddDiscipline(model);

            return(Json(model));
        }