Question

我有这个JSON：

{
   "results" : [
      {
         "elevation" : 25.51896667480469,
         "location" : {
            "lat" : -26.90408425509977,
            "lng" : -49.04650926589966
         },
         "resolution" : 152.7032318115234
      }
   ],
   "status" : "OK"
}

这堂课：

public class RootObject
{
    public Elevacao[] results { get; set; }
    public string status { get; set; }
}


public class Elevacao
{
    public Decimal elevation { get; set; }
    public Decimal resolution { get; set; }
    public dados[] location { get; set; }                
}

public class dados
{
    public Decimal lat { get; set; }
    public Decimal lng { get; set; } 
}

此代码：

public ActionResult Teste()
{
    var url = "http://maps.googleapis.com/maps/api/elevation/json?locations=-26.904084255099768,-49.04650926589966&sensor=false&format=json";
    var json = new WebClient().DownloadString(url);

    RootObject m = JsonConvert.DeserializeObject<RootObject>(json);

    return View();
}

这个错误：

Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'TCC.Controllers.dados[]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.
Path 'results[0].location.lat', line 6, position 20.

我哪里出错？

Answer 1

您的JSON中的

location是单个对象，而不是数组。

Answer 2

您需要来自JSONObject的“结果”。使用json.results

Answer 3

在JSON中，location是一个对象，而不是一个数组。但是，在Elevacao类location中定义为数组。它们需要匹配才能使反序列化正常工作。这就是错误消息试图告诉你的内容。

要解决此问题，请更改此行：

public dados[] location { get; set; }

对此：

public dados location { get; set; }

C＃Json.Net - 如何反序列化复杂对象Google Elevation

3 个答案: