JSON 传递给 ApiController 不反序列化字符串值

Question

我正在尝试将 JSON 数组传递给 ApiController，但字符串值未反序列化（它们被设置为空值）。奇怪的是我仍然得到正确数量的元素。

A 有一个 ApiController：

[RoutePrefix("api/language")]
public class LanguagePairApiController : ApiController

使用post方法：

// POST: api/language/create
[HttpPost]
[Route("create")]
public string Create([FromBody]LanguagePair[] languagePairs)

我正在发送 JSON 给它：

[
    {"Key":"Test","Value":"Test","Version":"1.0"},
    {"Key":"Areyousure","Value":"Are you sure?","Version":"1.0"},
    {"Key":"File","Value":"File","Version":"1.0"}
]

这是 class 我正在尝试将其映射到：

public class LanguagePair
{
    public string Key { get; set; }
    public string Value { get; set; }
    public string Version { get; set; }
}

但是字符串值作为空值通过：

我错过了什么？
编辑：我找到了一个答案并在下面post编辑了它。但我仍在寻找更好的答案...

Answer 1

我明白了。我需要用 DataContract 和 DataMember 属性装饰 class：

{
    [DataContract]
    public class LanguagePair
    {
        [DataMember]
        public string Key { get; set; }
        [DataMember]
        public string Value { get; set; }
        [DataMember]
        public string Version { get; set; }
    }
}

Answer 2

阅读Parameter Binding in ASP.NET Web API

您需要从操作中删除 [FromBody] 属性...

// POST: api/language/create
[HttpPost]
[Route("create")]
public string Create(LanguagePair[] languagePairs) { ... }

并且您可以保持 class 原来的苗条身材：

public class LanguagePair
{
    public string Key { get; set; }
    public string Value { get; set; }
    public string Version { get; set; }
}

Using [FromBody]

To force Web API to read a simple type from the request body, add the [FromBody] attribute to the parameter:
public HttpResponseMessage Post([FromBody] string name) { ... }
In this example, Web API will use a media-type formatter to read the value of name from the request body. Here is an example client request.
POST http://localhost:5076/api/values HTTP/1.1
User-Agent: Fiddler
Host: localhost:5076
Content-Type: application/json
Content-Length: 7

"Alice"
When a parameter has [FromBody], Web API uses the Content-Type header to select a formatter. In this example, the content type is "application/json" and the request body is a raw JSON string (not a JSON object).

JSON 传递给 ApiController 不反序列化字符串值

JSON passed to ApiController doesn't deserialize string values

c#

json

asp.net-web-api

asp.net-apicontroller