Question

首先：我是使用JSON的新手，我使用here上的答案使用Json.Net将Pokemon API中的数据反序列化为C＃类（Pokemon类）。我使用http://json2csharp.com来帮助我定义我的类，它看起来像这样：

public class Pokemon
{
    public Pokemon(string json)
    {         
        JsonConvert.PopulateObject(json, this, PokeApi.JsonSerializerSettings);
    }
    [JsonProperty("name")]
    public string Name { get; set; }

    [JsonProperty("evolutions")]
    public Evolutions evolutions { get; set; }

    [JsonProperty("national_id")]
    public int national_id { get; set; }
}

还有一堆其他属性，如resource_uri，攻击统计等。

正如前面提到的链接提供的答案所说，我使用了JsonConvert.DeserializeObject（json），如下所示：

public Pokemon GetPokemon(int nationalId)
{
using (WebClient client = new WebClient())
        {
            var json = client.DownloadString("http://pokeapi.co/api/v1/pokemon/" + nationalId + "/");
            var output = JsonConvert.DeserializeObject<Pokemon>(json);

            return output;
        }
    }

但是我一直得到一个异常，说“无法将当前的JSON数组（例如[1,2,3]”反序列化为'Evolutions'类型，因为该类型需要一个JSON对象......“

我发现很多其他问题都提出同样的问题，但我对最佳答案感到困惑 - 有时答案是使用JsonProperty，有时候是使用JsonConverter，而不是真正解释所有这些意味着什么。我需要两者吗？

编辑：示例json（电话：http://pokeapi.co/api/v1/pokemon/1/）

{
  "abilities": [
    {
      "name": "overgrow",
      "resource_uri": "/api/v1/ability/1/"
    },
    {
      "name": "chlorophyll",
      "resource_uri": "/api/v1/ability/2/"
    }
  ],
  "attack": 49,
  "catch_rate": 45,
  "created": "2013-11-02T12:08:25.745455",
  "defense": 49,
  "egg_cycles": 21,
  "egg_groups": [
    {
      "name": "Monster",
      "resource_uri": "/api/v1/egg/1/"
    },
    {
      "name": "Grass",
      "resource_uri": "/api/v1/egg/8/"
    }
  ],
  "ev_yield": "1 Sp Atk",
  "evolutions": {
    "level": 16,
    "method": "level up",
    "resource_uri": "/api/v1/pokemon/2/",
    "to": "Ivysaur"
  },
  "exp": 64,
  "growth_rate": "ms",
  "happiness": 70,
  "height": "2'4",
  "hp": 45,
  "male_female_ratio": "87.5/12.5",
  "modified": "2013-11-02T13:28:04.914889",
  "moves": [
    {
      "learn_type": "other",
      "name": "Tackle",
      "resource_uri": "/api/v1/move/1/"
    },
    {
      "learn_type": "other",
      "name": "Growl",
      "resource_uri": "/api/v1/move/2/"
    },
    {
      "learn_type": "level up",
      "level": 10,
      "name": "Vine whip",
      "resource_uri": "/api/v1/move/3/"
    }
  ],
  "name": "Bulbasaur",
  "national_id": 1,
  "resource_uri": "/api/v1/pokemon/4/",
  "sp_atk": 65,
  "sp_def": 65,
  "species": "seed pokemon",
  "speed": 45,
  "total": 318,
  "types": [
    {
      "name": "grass",
      "resource_uri": "/api/v1/type/5/"
    },
    {
      "name": "poison",
      "resource_uri": "/api/v1/type/8/"
    }
  ],
  "weight": "15.2lbs"
}

进化课程：

public class Evolutions
{
    public int level { get; set; }
    public string method { get; set; }
    public string resource_uri { get; set; }
    public string to { get; set; }
}

Answer 1

我用http://json2csharp.com/尝试http://pokeapi.co/api/v1/pokemon/19/，我看到的是

public class RootObject
{
    //...
    public List<Evolution> evolutions { get; set; }
   //...
}

这很棒的是你的口袋妖怪课程。所以你需要将Evolutions声明为列表。

无法反序列化当前的JSON数组

1 个答案: