Web api 的 POST 参数被设置为空

Question

我正在尝试使用 ng-resource 来 POST 我的 web-api 的值，然后在 javascript 中取回该值。

虽然请求似乎顺利通过，但传递给我的函数 public string AddOrder([FromBody]string order) 的参数似乎设置为 null.

orderController.js

var result = $scope.store.sendOrder("hello");

store.js

function store($resource) {

    var Resource = $resource('/api/products/');
    this.products = Resource.query();

    this.sendOrder = function (order) {

        var sendOrder = $resource('/api/products');

        var result = sendOrder.save("Helloa"); <---

        return result;
    }
}

ProductController.cs

[Route("api/products")]
[HttpPost]
public string AddOrder([FromBody]string order)
{
    return order; //When I put a breakpoint here and check the value of order, it is null.
}

原始请求

POST http://localhost:12345/api/products HTTP/1.1
Host: localhost:12345
Connection: keep-alive
Content-Length: 6
Accept: application/json, text/plain, */*
Origin: http://localhost:12345
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36
Content-Type: application/json;charset=UTF-8
Referer: http://localhost:12345/Home/Cart
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en;q=0.8,es;q=0.6,en-US;q=0.4
Cookie: ai_user=fc592beca77b4a5e8c4a95db221a574a|2014-12-04T18:36:22.7128874+00:00

hello

原始回复

HTTP/1.1 200 OK
Cache-Control: no-cache
Pragma: no-cache
Content-Type: application/json; charset=utf-8
Expires: -1
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcbXJ5YW4uQVNBVklFXERvY3VtZW50c1xleHByZXNzb1xFeHByZXNzb1x3ZWJzaXRlc1xjb25zdW1lclxhcGlccHJvZHVjdHM=?=
X-Powered-By: ASP.NET
Date: Mon, 12 Jan 2015 10:45:03 GMT
Content-Length: 4

null

有人有什么想法吗？

编辑

最快/最简单的解决方案是将字符串包装在一个对象中，如下所示：

Order.cs

public class Order
{
    public string order { get; set; }
}

ProductController.cs

[Route("api/products")]
[HttpPost]
public Order AddOrder([FromBody]Order order)
{
    return order;
}

Answer 1

到 post 到网络的字符串 api 它需要在前面加上 =。而且请求上没有设置 Content-Type。

  var sendOrder = $resource('/api/products',{}, { query: {method:'POST', headers: {'Content-Type': 'application/json'});

  var result = sendOrder.save("=" + "Helloa");

以上应该有效

Answer 2

虽然我不确定是什么原因导致控制器中的字符串为空，但您可以发送一个包含字符串的对象，而不是将字符串发布到 Web API 控制器，这将是接受正确。

Web api 的 POST 参数被设置为空

POST parameter to web api being set as null

javascript

c#

asp.net

asp.net-web-api

ngresource