如何使用 Newtonsoft 在 C# .NET 中从我的 JSON 数组反序列化为字典数组，其值是我的 "Resource" 对象？

Question

我在尝试将我的 JSON 反序列化为 Dictionary<string, Resources>[] 时遇到以下错误：

An unhandled exception of type 'Newtonsoft.Json.JsonSerializationException' occurred in Newtonsoft.Json.dll

Additional information: Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.Dictionary`2[System.String,MyProject.Resource][]' 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) 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.

我的Program.Main():

    public class Program
            {
                public static void Main(string[] Args)
                {
                    var options = new Options()
                    {
                        Option1 = "foo",
                        Option2 = "bar",
                        Resources = JsonConvert.DeserializeObject<Dictionary<string, Resource>[]>(resources.json)
                    };
                }
            }

我的resources.json:

{
    "global": [

        {
            "title": "global1",
            "url": "~/global1"
        },
        {
            "title": "global2",
            "url": "~/global2"
        }
    ],
    "ACC": [
        {
            "title": "acc1",
            "url": "~/acc1/"
        },
        {
            "title": "acc2",
            "url": "~/acc2/"
        }
    ],
    "ECC": [
        {
            "title": "ecc1",
            "url": "~/ecc1/"
        },
        {
            "title": "ecc2",
            "url": "~/ecc2/"
        }
    ],
    "ECB": [
        {
            "title": "ecb1",
            "url": "~/ecb1"
        }
    ]

}

我的资源class:

public class Resource
    {
        public List<string> titles { get; set; }

        public List<string> urls { get; set; }
    }

我的选项class:

public class Options
    {
        public string Option1 { get; set; }
        public string Option2 { get; set; }
        public Dictionary<string, Resource>[] Resources { get; set; }
    }

Answer 1

您的 Json 与您的 class 结构不匹配。
如果您想保留 class 结构，您的 json 必须如下所示：

{
   "global":{
      "titles":[
         "global1",
         "global2"
      ],
      "urls":[
         "~/global1",
         "~/global2"
      ]
   },
   "acc":{
      "titles":[
         "acc1",
         "acc2"
      ],
      "urls":[
         "~/acc1",
         "~/acc2"
      ]
   },

   ...    

}

如果您不能影响您的 json 文件（无论出于何种原因），您的 class 结构必须如下所示：

public class Rootobject
{
   public Global[] global { get; set; }
   public ACC[] ACC { get; set; }
   public ECC[] ECC { get; set; }
   public ECB[] ECB { get; set; }
}

public class Global
{
   public string title { get; set; }
   public string url { get; set; }
}

public class ACC
{
   public string title { get; set; }
   public string url { get; set; }
}

public class ECC
{
   public string title { get; set; }
   public string url { get; set; }
}

public class ECB
{
   public string title { get; set; }
   public string url { get; set; }
}

然后你可以这样反序列化它：

Resources = JsonConvert.DeserializeObject<Rootobject>(resources.json)

下次小记：
如果您不确定 class 结构的外观（关于 json 字符串），您可以复制 json 字符串并转到：

Visual Studio -> Edit -> Paste Special -> Paste JSON as Classes

和Visual Studio将构成适当的class结构。

Answer 2

你的JSON不代表一个字典数组（Dictionary<string, Resource>[]），它代表一个数组字典（Dictionary<string, Resource[]>）。这就是您收到错误的原因。

此外，您的资源 class 需要像这样定义以匹配 JSON:

public class Resource
{
    public string Title { get; set; }
    public string Url { get; set; }
}

然后你可以这样反序列化：

 Resources = JsonConvert.DeserializeObject<Dictionary<string, Resource[]>>(resources.json)

请在此处查看 fiddle：https://dotnetfiddle.net/8s2eQd

如何使用 Newtonsoft 在 C# .NET 中从我的 JSON 数组反序列化为字典数组，其值是我的 "Resource" 对象？

How to deserialize from my JSON array to an array of dictionaries whose values are my "Resource" objects in C# .NET using Newtonsoft?

c#

serialization

json

json.net

json-deserialization