前台：

               <tr>
                    <td>
                        图书出版社：
                    </td>
                    <td>
                        @Html.DropDownList("PublisherID", String.Empty)
                        @Html.ValidationMessageFor(m => m.Publisher)
                    </td>
                </tr>

 后台：

        [HttpPost]
        public ActionResult CreateComfirmed(MVC_Login.Models.Book book)
        {
            ViewBag.PublisherID = new SelectList(db.Publishers, "PublisherID", "PublisherTitle");

            if (ModelState.IsValid)
            {
                db.Books.Add(book);
                db.SaveChanges();
                return RedirectToAction("Index");
            }
        
            return View(book);
        }