/// <summary>
        /// 查看详细信息
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        // GET: Employees/Details/5
        public async Task <IActionResult> Details(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            /*
             * var employee = await _context.Employee
             *  .FirstOrDefaultAsync(item => item.Id == id);
             */
            Employee employee = await EmployeesService.FindEmployeeByIdAsync(id);

            if (employee == null)
            {
                return(NotFound());
            }
            return(View(employee));
        }