使用 Json.NET 对从 Dictionary<string, T> 派生的类型 T 进行序列化和反序列化

Question

我创建了一个示例项目。我正在序列化以下类型：

[JsonObject(IsReference = true, ItemReferenceLoopHandling = ReferenceLoopHandling.Serialize)]
public class SampleTree : Dictionary<string, SampleTree>
{
    [JsonProperty(ReferenceLoopHandling = ReferenceLoopHandling.Serialize)]
    public SampleClass Value { get; set; }

    [JsonProperty(IsReference = true, ReferenceLoopHandling = ReferenceLoopHandling.Serialize)]
    public SampleTree Parent { get; set; }
}

[JsonObject(IsReference = true)]
public class SampleClass
{
    public string A { get; set; }

    public int B { get; set; }

    public bool C { get; set; }
}

程序代码（为简单起见，控制台应用程序）：

static void Main(string[] args)
{
    var tree = new SampleTree
    {
        Value = new SampleClass
        {
            A = "abc",
            B = 1,
            C = true
        },
        Parent = null
    };

    var treeChild = new SampleTree
    {
        Value = new SampleClass
        {
            A = "def",
            B = 2,
            C = false
        },
        Parent = tree
    };

    tree.Add("firstChild", treeChild);

    var serializerSettings = new JsonSerializerSettings
    {
        PreserveReferencesHandling = PreserveReferencesHandling.All,
        ReferenceLoopHandling = ReferenceLoopHandling.Serialize,
        Formatting = Formatting.Indented
    };

    var serialized = JsonConvert.SerializeObject(tree, serializerSettings);

    var deserialized = JsonConvert.DeserializeObject<SampleTree>(serialized, serializerSettings);

    var d = deserialized;
}

序列化的结果非常完美：结果字符串包含了我之前放入树的所有数据。但是，使用相同的序列化程序设置反序列化该字符串是不正确的：结果对象根本没有子对象。也许主要问题是属性......这样的行为是什么原因？

Answer 1

我没有在 Main 函数中声明 Dictionary，而是向 SampleTree 本身添加了一个 Dictionary 类型的名为 Children 的属性（并删除了对 c 的继承）。

Answer 2

我不确定这是您需要的。

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {

        static void Main(string[] args)
        {
            Dictionary<string, SampleTree> tree = new Dictionary<string, SampleTree>();
            var a = new SampleTree
            {
                Value = new SampleClass
                {
                    A = "abc",
                    B = 1,
                    C = true
                },
                Parent = null
            };

            var treeChild = new SampleTree
            {
                Value = new SampleClass
                {
                    A = "def",
                    B = 2,
                    C = false
                },
                Parent = a
            };

            tree.Add("parent", a);
            tree.Add("child", treeChild);

            var serializerSettings = new JsonSerializerSettings
            {
                PreserveReferencesHandling = PreserveReferencesHandling.All,
                ReferenceLoopHandling = ReferenceLoopHandling.Serialize,
                Formatting = Formatting.Indented
            };

            var serialized = JsonConvert.SerializeObject(tree, serializerSettings);

            var deserialized = JsonConvert.DeserializeObject<Dictionary<string, SampleTree>>(serialized, serializerSettings);

            var d = deserialized;
        }
    }

    [JsonObject(IsReference = true, ItemReferenceLoopHandling = ReferenceLoopHandling.Serialize)]
    public class SampleTree
    {
        [JsonProperty(ReferenceLoopHandling = ReferenceLoopHandling.Serialize)]
        public SampleClass Value { get; set; }

        [JsonProperty(IsReference = true, ReferenceLoopHandling = ReferenceLoopHandling.Serialize)]
        public SampleTree Parent { get; set; }
    }

    [JsonObject(IsReference = true)]
    public class SampleClass
    {
        public string A { get; set; }

        public int B { get; set; }

        public bool C { get; set; }
    }

}

这对我来说完美无缺。如果这是您想要的，请告诉我。