序列化字典<,>作为Json.NET中的数组

参见英文答案 > Serialize dictionary as array (of key value pairs)5个
如何使Json.NET序列化器序列化IDictionary<,>实例到具有键/值属性的对象数组？
默认情况下,它将Key的值序列化为JSON对象的属性名称.

基本上我需要这样的东西：

[{"key":"some key","value":1},{"key":"another key","value":5}]

代替：

{{"some key":1},{"another key":5}}

我试图将KeyValuePairConverter添加到序列化程序设置,但它没有任何效果. (我发现这个转换器因IDictionary<>的类型而被忽略,但我不能轻易地改变我的对象的类型,因为它们是从其他库接收的,因此从IDictionary<>到ICollection< KeyValuePair<>>的更改不是我的选择.)

我能够让这个转换器工作.

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;

public class CustomDictionaryConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return (typeof(IDictionary).IsAssignableFrom(objectType) || 
                TypeImplementsGenericInterface(objectType,typeof(IDictionary<,>)));
    }

    private static bool TypeImplementsGenericInterface(Type concreteType,Type interfaceType)
    {
        return concreteType.GetInterfaces()
               .Any(i => i.IsGenericType && i.GetGenericTypeDefinition() == interfaceType);
    }

    public override void WriteJson(JsonWriter writer,object value,JsonSerializer serializer)
    {
        Type type = value.GetType();
        IEnumerable keys = (IEnumerable)type.GetProperty("Keys").GetValue(value,null);
        IEnumerable values = (IEnumerable)type.GetProperty("Values").GetValue(value,null);
        IEnumerator valueEnumerator = values.GetEnumerator();

        writer.WriteStartArray();
        foreach (object key in keys)
        {
            valueEnumerator.MoveNext();

            writer.WriteStartObject();
            writer.WritePropertyName("key");
            writer.WriteValue(key);
            writer.WritePropertyName("value");
            serializer.Serialize(writer,valueEnumerator.Current);
            writer.WriteEndObject();
        }
        writer.WriteEndArray();
    }

    public override object ReadJson(JsonReader reader,Type objectType,object existingValue,JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

以下是使用转换器的示例：

IDictionary<string,int> dict = new Dictionary<string,int>();
dict.Add("some key",1);
dict.Add("another key",5);

string json = JsonConvert.SerializeObject(dict,new CustomDictionaryConverter());
Console.WriteLine(json);

这是上面的输出：

[{"key":"some key","value":5}]

原文链接：https://www.f2er.com/json/288525.html

序列化字典<,>作为Json.NET中的数组

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