BookStore_NETMVC.DAL.BooksController.Edit C# (CSharp) Method

        public ActionResult Edit(Book book)
        {
            if (ModelState.IsValid)
            {
                db.Entry(book).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            ViewBag.CategoryId = new SelectList(db.Category, "iCategoryID", "strCategoryName", book.iCategoryID);
            return View(book);
        }