public static IEnumerable <SelectListItem> slots(String doctorid)
            {
                IList <SelectListItem> items = new List <SelectListItem>();
                Hospital_request       hr    = new Hospital_request();
                List <DateTime>        dt    = hr.timeslots(doctorid);

                foreach (DateTime item in dt)
                {
                    items.Add(new SelectListItem {
                        Text = item.Hour.ToString(), Value = item.Hour.ToString()
                    });
                }
                return(items);
            }