发布JSON来MVC 4的WebAPI控制器动作。为什么它不反序列化我的数组？ [英] Posting json to mvc 4 WebApi controller action. Why doesn't it deserialize my array?

问题描述

下面已经快把我有点疯狂。我已经发现了几个类似的问题，但他们没有提供一个解决方案。我试图张贴包含几个数据项的JSON对象。其中之一是对象本身的清单。在这里，它是：

The following has been driving me a bit crazy. I have found a couple of similar problems but they did not offer a solution. I am trying to post a json object containing a few data items. One of them is a list of object itself. Here it is:

{
"ClaimType":"Trade",
"ClaimedProductId":"4",
"ClaimingUserId":"2",
"Message":"test",
"TradeOffers":[
  {
     "OfferedProductId":"7",
     "OfferedQuantity":"5"
  },
  {
     "OfferedProductId":"12",
     "OfferedQuantity":"2"
  }
]
}

这JSON验证。

我的控制器看起来是这样的：

My controller looks like this:

public class ProductController : ApiController
{
    [HttpPost]
    public void Claim(ClaimViewModel claimViewModel)
    {
        //do some amazing stuff with the data from the viewmodel.
        //sorry guys. This stuff is just tooo cool to be posted here for all to see
        //NOT ;-)  
    }
}

该ClaimViewModel我张贴如下所示：

The ClaimViewModel I am posting looks like this:

public class ClaimViewModel
    {
    public Claim.ClaimRequestTypes ClaimType { get; set; } 
    public int ClaimedProductId { get; set; }
    public int ClaimingUserId { get; set; }
    public string Message { get; set; }
    public List<TradeOffer> TradeOffers { get; set; }
    }

为了完整起见，这里的TradeOffer类：

For completeness sake, here's the TradeOffer class:

public class TradeOffer
{
    int OfferedProductId { get; set; }
    int OfferedQuantity { get; set; }
}

我盯着从Javascript发布之前，我喜欢使用Chrome RestConsole来测试这个坏小子，让我可以看看引擎盖下好一点。我提出一个请求，使用以下设置：

Before I staring posting from Javascript, I like to use the Chrome RestConsole to test this bad boy, so I can look a bit better under the hood. I make a request with the following settings:

• 的POST请求


• 正文内容类型是应用/ JSON


• 我发送JSON作为RAW身体
请求负载

那么这里发生了什么：在所有属性上我的 ClaimViewModel 获取反序列化好和容易。但是， TradeOffers 属性被实例化和调试时显示为2（到目前为止好），但对象在这个列表中的值（属性<$计数的列表C $ C> OfferedProductId 和 OfferedQuantity ）始终为0 /零（不为空！）

Then here's what happens: all properties on my ClaimViewModel get deserialized nice and easy. However, the TradeOffers property get instantiated and when debugging shows a list with a count of 2 (so far so good) but the values of the objects in this list (properties OfferedProductId and OfferedQuantity) are always 0/zero (not null!)

推荐答案

在 TradeOffer 类属性是私有的（在C＃中默认的访问修饰符），这使得它无法设置他们从外面。尽量使他们公共：

Properties in TradeOffer class are private (default access modifier in C#), which makes it impossible to set them from outside. Try making them public:

public class TradeOffer
{
    public int OfferedProductId { get; set; }
    public int OfferedQuantity { get; set; }
}

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