MVC增删改查（API一个项目下拉框查询）

//////页面跳转
<a href="/Home/Client_Delete/@item.BookID">删除</a>
<a href="/Home/Client_Put/@item.BookID">修改</a>

///////WebApiConfig里修改路由配置
public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            
            // Web API 配置和服务
            // 将 Web API 配置为仅使用不记名令牌身份验证。
            config.SuppressDefaultHostAuthentication();
            config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));

            // Web API 路由
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );

            config.Routes.MapHttpRoute(
                 name: "Actiontapi",
                 routeTemplate: "Actiontapi/{controller}/{action}/{id}",
                 defaults: new { id = RouteParameter.Optional }
             );
        }
    }







//////Api页面方法
    day20_BookEntities db = new day20_BookEntities();
        // GET: api/BookApi
        public IEnumerable<OrderInfo> Get()
        {
            var data = from s in db.Book
                       join ss in db.TypeInfo on s.BookTid equals ss.Tid
                       select new OrderInfo()
                       {
                           BookID = s.BookID,
                           BookName = s.BookName,
                           BookTid = s.BookTid,
                           BookNum = s.BookNum,
                           BookPrice = s.BookPrice,
                           Tname = ss.Tname,
                       };
            return data.ToList();
        }
        [HttpGet]
        public List<OrderInfo> Select(int id)
        {
            var data = from s in db.Book
                       join ss in db.TypeInfo on s.BookTid equals ss.Tid
                       where s.BookTid == id
                       select new OrderInfo()
                       {
                           BookID = s.BookID,
                           BookName = s.BookName,
                           BookTid = s.BookTid,
                           BookNum = s.BookNum,
                           BookPrice = s.BookPrice,
                           Tname = ss.Tname,
                       };
            return data.ToList();
        }
        // POST: api/BookApi
        public void Post([FromBody]Book value)
        {
            db.Book.Add(value);
            db.SaveChanges();
        }

        // PUT: api/BookApi/5
        public void Put(int id, [FromBody]OrderInfo value)
        {
            var b = db.Book.Where(T => T.BookID == value.BookID).FirstOrDefault();
            if (b != null)
            {
                b.BookID = value.BookID;
                b.BookName = value.BookName;
                b.BookTid = value.BookTid;
                b.BookNum = value.BookNum;
                b.BookPrice = value.BookPrice;
            }
            db.SaveChanges();
        }

        // DELETE: api/BookApi/5
        public HttpResponseMessage Delete(int id)
        {
            var b = db.Book.Where(T => T.BookID == id).FirstOrDefault();
            try
            {
                if (b != null)
                {
                    db.Book.Remove(b);
                    db.SaveChanges();
                    return new HttpResponseMessage() { StatusCode = HttpStatusCode.OK };
                }
                else
                {
                    return new HttpResponseMessage() { StatusCode = HttpStatusCode.NoContent };
                }
            }
            catch (Exception)
            {
                return new HttpResponseMessage() { StatusCode = HttpStatusCode.InternalServerError };
            }
        }




public ActionResult Client_Get()
        {
            //下拉列表
            day20_BookEntities db = new day20_BookEntities();
            var selectlist = db.TypeInfo;
            SelectList list2 = new SelectList(selectlist, "Tid", "Tname");
            ViewBag.SelectList = list2;


            Uri url = new Uri("http://localhost:52444");
            HttpClient client = new HttpClient();
            client.BaseAddress = url;
            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            HttpResponseMessage message = client.GetAsync("api/BookApi").Result;
            List<OrderInfo> list = new List<OrderInfo>();
            if (message.IsSuccessStatusCode)
            {
                list = message.Content.ReadAsAsync<List<OrderInfo>>().Result;
            }
            client.Dispose();
            return View(list);
        }
        public ActionResult Client_Select(int id)
        {
            //下拉列表
            day20_BookEntities db = new day20_BookEntities();
            var selectlist = db.TypeInfo;
            SelectList list2 = new SelectList(selectlist, "Tid", "Tname");
            ViewBag.SelectList = list2;

             
            Uri url = new Uri("http://localhost:52444");
            HttpClient client = new HttpClient();
            client.BaseAddress = url;
            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            HttpResponseMessage message = client.GetAsync("Actiontapi/BookApi/Select/" + id).Result;
            List<OrderInfo> list = new List<OrderInfo>();
            if (message.IsSuccessStatusCode)
            {
                list = message.Content.ReadAsAsync<List<OrderInfo>>().Result;
            }
            client.Dispose();
            return View("Client_Get", list);
        }
        public ActionResult Client_Post()
        {
            //下拉列表
            day20_BookEntities db = new day20_BookEntities();
            var selectlist = db.TypeInfo;
            SelectList list2 = new SelectList(selectlist, "Tid", "Tname");
            ViewBag.SelectList = list2;

            return View();
        }
        [HttpPost]
        public ActionResult Client_Post(Book o)
        {
            Uri url = new Uri("http://localhost:52444");
            HttpClient client = new HttpClient();
            client.BaseAddress = url;
            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            HttpContent content = new StringContent("{BookName:'" + o.BookName + "',BookTid:'" + o.BookTid + "',BookNum:'" + o.BookNum + "',BookPrice:'" + o.BookPrice + "'}");
            content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
            HttpResponseMessage message = client.PostAsync("api/BookApi",content).Result;
            if (message.IsSuccessStatusCode)
            {
                client.Dispose();
                return Content("<script>alert('提交成功');location.href='/Home/Client_Get'</script>");
            }
            else
            {
                return Content("<script>alert('提交成功')</script>");
            }
        }

        public ActionResult Client_Delete(int id)
        {
            Uri url = new Uri("http://localhost:52444");
            HttpClient client = new HttpClient();
            client.BaseAddress = url;
            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            HttpResponseMessage message = client.DeleteAsync("api/BookApi/"+id).Result;
            if (message.IsSuccessStatusCode)
            {
                client.Dispose();
                return Content("<script>alert('删除成功');location.href='/Home/Client_Get'</script>");
            }
            else
            {
                return Content("<script>alert('删除成功')</script>");
            }
        }

        public ActionResult Client_Put(int id)
        {
            //下拉列表
            day20_BookEntities db = new day20_BookEntities();
            var selectlist = db.TypeInfo;
            SelectList list2 = new SelectList(selectlist, "Tid", "Tname");
            ViewBag.SelectList = list2;


            var data = db.Book.Where(T => T.BookID == id).FirstOrDefault();
            var result = new OrderInfo()
            {
                BookID = data.BookID,
                BookName = data.BookName,
                BookNum = data.BookNum,
                BookPrice = data.BookPrice,
                BookTid = data.BookTid,
            };

            return View(result);
        }
        [HttpPost]
        public ActionResult Client_Put(Book o)
        {
            Uri url = new Uri("http://localhost:52444");
            HttpClient client = new HttpClient();
            client.BaseAddress = url;
            client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            HttpContent content = new StringContent("{BookID:'" + o.BookID + "',BookName:'" + o.BookName + "',BookTid:'" + o.BookTid + "',BookNum:'" + o.BookNum + "',BookPrice:'" + o.BookPrice + "'}");
            content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
            HttpResponseMessage message = client.PutAsync("api/BookApi/"+o.BookID ,content).Result;
            if (message.IsSuccessStatusCode)
            {
                client.Dispose();
                return Content("<script>alert('提交成功');location.href='/Home/Client_Get'</script>");
            }
            else
            {
                return Content("<script>alert('提交成功')</script>");
            }
        }