/// <summary>
        /// Добавление учебного занятия в журнал
        /// </summary>
        /// <param name="elGradebookId"></param>
        /// <returns></returns>
        public async Task <IActionResult> ElGradebookLessonCreate(int elGradebookId)
        {
            ElGradebook elGradebook = await _elGradebookRepository.GetElGradebookWithLessonsAsync(elGradebookId);

            if (elGradebook == null)
            {
                return(NotFound());
            }

            ElGradebookLesson elGradebookLesson = new ElGradebookLesson {
                Date = DateTime.Today
            };

            elGradebookLesson.ElGradebookId = elGradebook.ElGradebookId;
            elGradebookLesson.ElGradebook   = elGradebook;

            ViewBag.ElGradebookLessonTypes = _selectListRepository.GetSelectListElGradebookLessonTypes();

            return(View("ElGradebookLessonCreateOrUpdate", elGradebookLesson));
        }