c# - 无法使用 RestSharp 反序列化带方括号的 JSON

Question

希望你能帮助我。我想打印其中一个元素的“标签”。

JSON 输入：

[
  {
    "entity":{
      "type":"postcode",
      "id":"P11516",
      "label":"18314 Divitz-Spoldershagen",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]

  },
  {
    "entity":{
      "type":"postcode",
      "id":"P11541",
      "label":"18314 Kenz-Küstrow",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]

  },
  {
    "entity":{
      "type":"postcode",
      "id":"P11549",
      "label":"18314 Löbnitz",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]

  },
  {
    "entity":{
      "type":"postcode",
      "id":"P11551",
      "label":"18314 Lüdershagen",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]
  }
]

以及使用 JsonDeserializer 的 API 调用

public string callGACWithPLZSandbox(string plz)
{
    var client = new RestClient("http://rest.sandbox-immobilienscout24.de");
    var request = new RestRequest("restapi/api/gis/v2.0/geoautocomplete/DEU", Method.GET);
    client.ClearHandlers();
    client.AddHandler("application/json", new JsonDeserializer());
    request.AddQueryParameter("i", plz);
    request.AddQueryParameter("t", "postcode");
    request.AddHeader("bla", "blub");
    IRestResponse<Rootobject> response = client.Execute<Rootobject>(request);

    return response.Data.Property1[1].entity.label;
}

还有，类

class Rootobject
{
    public Class1[] Property1 { get; set; }
}

class Class1
{
    public Entity entity { get; set; }
    public Match[] matches { get; set; }
}

class Entity
{
    public string type { get; set; }
    public string id { get; set; }
    public string label { get; set; }
    public string value { get; set; }
}

 class Match
{
    public int offset { get; set; }
    public int length { get; set; }
}

我做错了什么？结果始终是“NullReferenceException：对象引用未设置为对象的实例”...

Answer 1

您有两个选择，要么将您尝试序列化的对象更改为：

IRestResponse<List<Class1>> response = client.Execute<List<Class1>>(request);

或者将你的 Json 修改为

{
 "Property1" : [
  {
    "entity":{
      "type":"postcode",
      "id":"P11516",
      "label":"18314 Divitz-Spoldershagen",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]

  },
  {
    "entity":{
      "type":"postcode",
      "id":"P11541",
      "label":"18314 Kenz-Küstrow",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]

  },
  {
    "entity":{
      "type":"postcode",
      "id":"P11549",
      "label":"18314 Löbnitz",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]

  },
  {
    "entity":{
      "type":"postcode",
      "id":"P11551",
      "label":"18314 Lüdershagen",
      "value":"18314"
    },
    "matches":[
      {
        "offset":0,
        "length":5
      }
    ]
  }
]
}

如果您修改了 json，请保留序列化调用，就像现在一样。