asp.net OWIN 保存 JSON post 数据

Question

我使用自托管 OWIN 设置了一个测试命令行应用程序。我有一个测试控制器，它按预期工作，在获取请求时提供一个静态主页和两个 JSON 格式的值。

我正在使用 JsonFormatter 来格式化所有结果。

我想从 post 请求中读取 JSON 数据。我可以发送已接受的消息响应，但读取时数据始终为空。

// POST api/values 
[HttpPost]
public HttpResponseMessage Post([FromBody]string myString)
    {
        Console.WriteLine("Terry Tibbs");
        Console.WriteLine(myString);
        return new HttpResponseMessage(System.Net.HttpStatusCode.Accepted);
    }

我在 Chrome 中使用 Postman 到 post 数据如下，但 myString 始终为空。

POST /api/values HTTP/1.1
Host: localhost:8080
Content-Type: application/json
Cache-Control: no-cache
Postman-Token: a966fa36-010d-3e2b-ad66-2f82dcb155ed
{
   "myString": "This is new"
}

Answer 1

阅读Parameter Binding in ASP.NET Web API

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 myString) { ... }
In this example, Web API will use a media-type formatter to read the value of myString from the request body. Here is an example client request.
POST api/values HTTP/1.1
User-Agent: Fiddler
Host: localhost:8080
Content-Type: application/json
Content-Length: 13

"This is new"
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).

asp.net OWIN 保存 JSON post 数据

asp.net OWIN save the JSON post data

asp.net

json

httprequest

owin

httpresponse

Using [FromBody]