ASP.NET 反序列化 JSON 返回 Null

Question

我是 ASP.NET 的新手，我正在嘗試向 YesNo API 發出 GET 請求。

但是，當嘗試反序列化 JSON 響應並將值分配給變量時，我得到 null 值。

任何援助將不勝感激！

Controller 代碼：

    [RoutePrefix("api/YesNo")]
    public class YesNoController : ApiController
    {

        [Route("GetYesNo")]
        public HttpResponseMessage GetYesNo()
        {
            Uri loginUrl = new Uri("https://yesno.wtf/api");
            HttpClient client = new HttpClient();
            client.BaseAddress = loginUrl;

            YesNoModel YesNoData = new YesNoModel();
            var httpResponse = Request.CreateResponse(HttpStatusCode.OK);

            HttpResponseMessage response = client.GetAsync(client.BaseAddress).Result;
            if (response.IsSuccessStatusCode)
            {
                string data = response.Content.ReadAsStringAsync().Result;
                YesNoData = JsonConvert.DeserializeObject<YesNoModel>(data);
            }

            httpResponse.Content = new StringContent(JsonConvert.SerializeObject(YesNoData), Encoding.UTF8, "application/json");
            return httpResponse;
        }
    }
    class YesNoModel
    { 
        string answer { get; set; }
        bool forced { get; set; }
        string image { get; set; }
    }

Postman 響應示例：

{
    "answer": "no",
    "forced": false,
    "image": "https://yesno.wtf/assets/no/20-56c4b19517aa69c8f7081939198341a4.gif"
}

調試時data變量的值： data var value

調試時YesNoData變量的值： YesNoData var value

Answer 1

您需要將您的屬性指定為公開的，以便在反序列化中對其進行設置。

class YesNoModel
{
    public string answer { get; set; }
    
    public bool forced { get; set; }
    
    public string image { get; set; }
}

Answer 2

公開您的屬性

public class YesNoModel
{ 
   public  string Answer { get; set; }
   public  bool Forced { get; set; }
   public  string Image { get; set; }
}