Question

您好我正在开发一个azure web api，我的put方法在下面

  public string[] Put(SampleRequest request)
        {

            //Getting Request initials
            string[] filmNames = request.Inputs.FilmIds;
            int userAge = request.Inputs.UserAge;
            char userGender = request.Inputs.UserGender;
            int userId = request.Inputs.UserId;
            .
            .
            . Doesnt matter rest of them...

当我尝试与json通信时，我的put方法中的请求（这是一个SampleRequest对象）变为null，因此我无法解析它以获取其中的数据，会出现什么问题？我的数据模型，帮助页面json格式和我的json请求（在另一个应用程序中）位于

之下

public class SampleRequest
    {
        public InputsRequest Inputs { get; set; }
    }

    public class InputsRequest
    {
        public int UserId { get; set; }
        public int UserAge { get; set; }
        public char UserGender { get; set; }
        public string[] FilmIds { get; set; }
    }

application / json，text / json [API HELP PAGE]

Sample:
{
  "Inputs": {
    "UserId": 1,
    "UserAge": 2,
    "UserGender": "A",
    "FilmIds": [
      "sample string 1",
      "sample string 2"
    ]
  }
}

我的其他应用程序的请求：

      var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:5291/api/values");
      httpWebRequest.ContentType = "text/json";
      httpWebRequest.Method = "PUT";

      var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream());
      string json = "{"+"\"Inputs\""+":"+"{"+ "\"UserId\"" + ":" + "12345" + "," 
                                    + "\"UserAge\"" + ":" + "23" + "," 
                                    + "\"UserGender\"" + ":" + "\"M\"" + "," 
                                    + "\"FilmIds\"" + ":" + 
"[\"Kung Fu Panda\",\"I Am Legend\",\"I Am Number Four\"]"+
                                    "}"+"}";

      streamWriter.Write(json);

      var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
      using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
      {
      var responseText = streamReader.ReadToEnd();
      }

快速注意：是的我知道这个名字是FilmIds，但我得到的是电影名字：D不要担心它

Answer 1

这个问题来自异步方法，从put函数中获取null的原因是测试应用程序没有发送它的所有消息，因此put方法什么都没有，解决方案是使用下面的Putasync方法

 using (var htc = new HttpClient())
            {
                var res = await htc.PutAsync("http://localhost:5291/api/values", new StringContent(serializedObject, Encoding.UTF8, "application/json"));
            }

Asp.net web api json interraction

1 个答案: