向Web API控制器发送请求时出现404错误

本文介绍了向Web API控制器发送请求时出现404错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在创建一个ASP.NET MVC网站，正如标题所说，我正在尝试使用jquery向Web Api控制器发送POST请求，但始终收到404错误.疯狂的是，在.NET Framework 4.5中，完全相同的东西起作用，但是在.NET Framework 4.6.2中，实际上没有.我已经在Google中找到很多线程来解释可能会出错的地方，但是这些都不起作用.所以，这是我的代码: Web Api类:

I am creating a ASP.NET MVC web site and as the title say i am trying to send a POST request to Web Api controller with jquery, but am always receiving a 404 error. The crazy thing is that in the .NET framework 4.5 the exact the same thing worked, but in the .NET framework 4.6.2 it really doesn''t. I ''ve found a lot of threads in google explaining what it might go wrong, but none of these worked. So, here is my code now: The Web Api Class:

[Authorize] public class CartController : ApiController { private ApplicationDbContext _context; public CartController() { _context = new ApplicationDbContext(); } [HttpPost] public IHttpActionResult AddToCart(string productId) { if (!ModelState.IsValid || !ItemIsValid(productId)) return BadRequest(); var newCartItem = new ShoppingCartItem { ProductId = productId, UserId = User.Identity.GetUserId() }; _context.ShoppingCartItems.Add(newCartItem); _context.SaveChanges(); return Ok(); } private bool ItemIsValid(string productId) { return Enumerable.Any(_context.Products, contextproduct => contextproduct.Id.ToString() == productId && contextproduct.NumberAvailable > 0); } }

我的jQuery代码:

My jQuery code:

$(".buy-button").click(function() { if (@User.Identity.IsAuthenticated.ToString().ToLower() === true) { $.ajax({ url: "/api/cart", method: "POST", data: $(this).next().val() }).done(function() { alert("Product succesfully added to cart!"); }); } else { window.location.href = "@Url.Action("Login", "Account")"; } });

Global.asax代码:

The Global.asax code:

AreaRegistration.RegisterAllAreas(); GlobalConfiguration.Configure(WebApiConfig.Register); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles);

如果有人可以帮助我，那将是很棒的.我已经花了6多个小时来解决这个错误，但我仍然找不到我做错了什么. 我尝试过的事情: 1)一些线程说Global.asax中调用"的顺序很重要，因此我更改了"

It would be great if someone could help me. I have spent over 6 hours on this bug, and i can''t still find out what i am doing wrong. What I have tried: 1) Some threads said that the order of the "calls" in the Global.asax matters, so i changed the position of ''

RouteConfig.RegisterRoutes(RouteTable.Routes);

" 的位置 在任何可能的地方. 2)在我的Web Api操作([Route("api/Cart/AddToCart")])中添加了路线属性，根据经验我知道这是多余的……并相应地更改了我的jQuery代码. 3)我没有添加属性，而是将Routes直接添加到Web Api Config. 4)我也尝试直接用邮递员打电话给Api(我当然删除了Authorize属性). 这些都不起作用.

'' in every possible place. 2) Added Route Attributes in my Web Api action([Route("api/Cart/AddToCart")]) which i know from experience that is redundant ... and changed my jQuery code accordingly. 3) Instead of adding attributes, i added to Routes directly to the Web Api Config. 4) I also tried to call the Api with postman directly(i removed the Authorize attribute of course). None of these worked.

推荐答案

(.buy-button").click(function(){ 如果(@ User.Identity.IsAuthenticated.ToString().ToLower()=== true){ (".buy-button").click(function() { if (@User.Identity.IsAuthenticated.ToString().ToLower() === true) {

.ajax({ 网址:"/api/cart"， 方法:"POST"， 数据: .ajax({ url: "/api/cart", method: "POST", data:

(this).next().val() }).done(function(){ alert(产品成功添加到购物车！"); }); } 别的 { window.location.href ="@ Url.Action("登录，"帐户)"; } }); (this).next().val() }).done(function() { alert("Product succesfully added to cart!"); }); } else { window.location.href = "@Url.Action("Login", "Account")"; } });

Global.asax代码:

The Global.asax code:

AreaRegistration.RegisterAllAreas(); GlobalConfiguration.Configure(WebApiConfig.Register); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles);

如果有人可以帮助我，那将是很棒的.我已经花了6多个小时来解决这个错误，但我仍然找不到我做错了什么. 我尝试过的事情: 1)一些线程说Global.asax中调用"的顺序很重要，因此我更改了"

It would be great if someone could help me. I have spent over 6 hours on this bug, and i can''t still find out what i am doing wrong. What I have tried: 1) Some threads said that the order of the "calls" in the Global.asax matters, so i changed the position of ''

RouteConfig.RegisterRoutes(RouteTable.Routes);

" 的位置 在任何可能的地方. 2)在我的Web Api操作([Route("api/Cart/AddToCart")])中添加了路线属性，根据经验我知道这是多余的……并相应地更改了我的jQuery代码. 3)我没有添加属性，而是将Routes直接添加到Web Api Config. 4)我也尝试直接用邮递员打电话给Api(我当然删除了Authorize属性). 这些都不起作用.

'' in every possible place. 2) Added Route Attributes in my Web Api action([Route("api/Cart/AddToCart")]) which i know from experience that is redundant ... and changed my jQuery code accordingly. 3) Instead of adding attributes, i added to Routes directly to the Web Api Config. 4) I also tried to call the Api with postman directly(i removed the Authorize attribute of course). None of these worked.