public async Task <IActionResult> Edit(int id, [Bind("InstructorId,FirstName,LastName,MiddleName")] Instructor instructor)
        {
            if (id != instructor.InstructorId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(instructor);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!InstructorExists(instructor.InstructorId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(instructor));
        }
        public IActionResult docdatasave(Document data)
        {
            using (var db = new ClassroomContext())
            {
                db.Update(data);
                db.SaveChanges();
                ElasticManager em = new ElasticManager();
                em.addDocument(data);
            }

            return(Content("success"));
        }