序列化 Dictionary<string,Type> 并从 JSON 字符串中删除键/值

Question

我有以下代码 sn-p，其中我将对象序列化为 JSON。代码运行良好，但我想从 JSON 字符串中删除 Key 和 Value 关键字。

当前输出：

{
   "Description":"test",
   "RoomTypes":[
      {
         "Key":"A",
         "Value":{
            "Name":"Delux"
         }
      },
      {
         "Key":"B",
         "Value":{
            "Name":"Non delux"
         }
      }
   ],
   "Url":"http:\/\/test.com"
}

期望的输出：

{
   "Description":"test",
   "RoomTypes":[
      {
         "A":{
            "Name":"Delux"
         }
      },
      {
         "B":{
            "Name":"Non delux"
         }
      }
   ],
   "Url":"http:\/\/test.com"
}

我的测试代码：

namespace ConsoleApplication1
{
    [DataContract]
    public class Room
    {
        [DataMember]
        public string Url { get; set; }
        [DataMember]
        public string Description { get; set; }
        [DataMember]
        public Dictionary<string, RoomTypes> RoomTypes { get; set; }
    }

    [DataContract]
    public class RoomTypes
    {
        [DataMember]
        public string Name { get; set; }
    }

    public class Test
    {
        static void Main(string[] args)
        {
            Room room = new Room { Url = "http://test.com", Description="test" };
            RoomTypes roomType1 = new RoomTypes() { Name = "Delux" };
            RoomTypes roomType2 = new RoomTypes() { Name = "Non delux" };
            room.RoomTypes = new Dictionary<string, RoomTypes>();
            room.RoomTypes["A"] = roomType1;
            room.RoomTypes["B"] = roomType2;

            DataContractJsonSerializer dataContractSer = 
                   new DataContractJsonSerializer(typeof(Room));
            StringBuilder sb = new StringBuilder();
            MemoryStream ms = new MemoryStream();
            dataContractSer.WriteObject(ms, room);
            var result = Encoding.UTF8.GetString(ms.ToArray());
            Console.WriteLine(result);
        }
    }
}

有没有办法做到这一点？

Answer 1

这不好玩，但试试这个：

[Test]
public void Json()
{
         var input = @"{
   ""Description"":""test"",
   ""RoomTypes"":[
      {
         ""Key"":""A"",
         ""Value"":{
            ""Name"":""Delux""
         }
      },
      {
         ""Key"":""B"",
         ""Value"":{
            ""Name"":""Non delux""
         }
      }
   ],
   ""Url"":""http:\/\/test.com""
}";

    var temp = JsonConvert.DeserializeObject<Temp>(input);
    var transform = new Transform
        {
            Description = temp.Description,
            Url = temp.Url,
            RoomTypes = new List<IDictionary<string, Temp.NameObj>>()
        };

    foreach (var group in temp.RoomTypes)
    {
        var dic = new Dictionary<string, Temp.NameObj> {{@group.Key, @group.Value}};
        transform.RoomTypes.Add(dic);
    }

    Console.WriteLine(JsonConvert.SerializeObject(transform));
}

public class Transform
{
    public string Description { get; set; }
    public IList<IDictionary<string, Temp.NameObj>> RoomTypes { get; set; }
    public string Url { get; set; }
}


public class Temp
{
    public string Description { get; set; }
    public IList<GroupObj> RoomTypes { get; set; }
    public string Url { get; set; }

    public class GroupObj
    {
        public string Key { get; set; }
        public NameObj Value { get; set; }
    }

    public class NameObj
    {
        public string Name { get; set; }
    }
}    

思路是利用Json.Net的字典序列化来实现你想要的结构。

Answer 2

如果您使用 .NET Framework v4.5 或更高版本，您可以将 DataContractJsonSerializerSettings.UseSimpleDictionaryFormat 设置为 true 以更接近您想要的格式：

var settings = new DataContractJsonSerializerSettings();
settings.UseSimpleDictionaryFormat = true;

var dataContractSer = new DataContractJsonSerializer(typeof(Room), settings);

使用带有上述修改的问题中的测试代码会产生以下输出，可能就是您要查找的内容（尽管它与问题中所述的所需输出不同）：

{
  "Description": "test",
  "RoomTypes": {
    "A": {
      "Name": "Delux"
    },
    "B": {
      "Name": "Non delux"
    }
  },
  "Url": "http://test.com"
}

Answer 3

这是因为您使用字典来存储值。您必须编写自定义实现并覆盖序列化/反序列化方法

查看here了解更多详情

Answer 4

我知道您不想使用 Json.NET，但说真的，这是专门为处理 JSON 序列化而构建的库。 Json.NET 完全满足您的要求，您只需将其编写为一行代码...

（来自文档：）

Dictionary<string, int> points = new Dictionary<string, int>
{
    { "James", 9001 },
    { "Jo", 3474 },
    { "Jess", 11926 }
};

string json = JsonConvert.SerializeObject(points, Formatting.Indented);

Console.WriteLine(json);
// {
//   "James": 9001,
//   "Jo": 3474,
//   "Jess": 11926
// }

http://www.newtonsoft.com/json/help/html/serializedictionary.htm

Answer 5

你可以用字符串替换函数来修改你的字符串试试这个

>   public string updatejson (string jsonorg)
>     {
>         string updatedjson = "";
>         updatedjson = jsonorg.Replace("\"Key\":", "");
>         updatedjson = updatedjson.Replace("\"Value\":", "");
>         updatedjson = updatedjson.Replace("\",", "\":");
>         updatedjson = updatedjson.Replace("},{", ",");
>         updatedjson = updatedjson.TrimStart('[');
>         updatedjson = updatedjson.TrimEnd(']');
> 
>         return updatedjson;
>     }