使用 JSON.NET 将已知和未知的 JSON 字段反序列化为 CLR 对象

Question

我有以下 JSON 负载：

{
    "id": 1,
    "foo": "bar",
    "bar": "foo",
    "attr_1": ["foo", "bar"],
    "attr_2": ["foo2", "bar2"]
}

我还有以下 CLR 对象：

public class Obj
{
    public int Id { get; set; }
    public string Foo { get; set; }
    public string Bar { get; set; }

    [JsonExtensionData]
    public IDictionary<string, string[]> Properties { get; set; }
}

如果我尝试反序列化它，它会失败：

using (FileStream file = File.Open(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "file.txt"), FileMode.Open))
using (StreamReader reader = new StreamReader(file))
{
    Obj foo = JsonConvert.DeserializeObject<Obj>(reader.ReadToEnd());
}

There is already an answer to a similar question。但是，一个一个地读写每个字段并不是一个解决方案。我将剩余字段反序列化为IDictionary<string, string[]> 的最佳方法是什么？

Answer 1

This line 在 Json.NET 源代码中强制值类型为 JToken。我认为最简单的方法是为序列化创建另一种类型。

public class SerializationModel
{
    public int Id { get; set; }
    public string Foo { get; set; }
    public string Bar { get; set; }

    [JsonExtensionData]
    public IDictionary<string, JToken> Properties { get; set; }
}

class Model
{
    public int Id { get; set; }
    public string Foo { get; set; }
    public string Bar { get; set; }
    public Dictionary<string, string[]> Properties { get; set; }
}

[Test]
public void DeserializeTest()
{
    string data = File.ReadAllText("data.txt");
    SerializationModel serializationModel = JsonConvert.DeserializeObject<SerializationModel>(data);

    Model model = new Model
    {
        Id = serializationModel.Id,
        Foo = serializationModel.Foo,
        Bar = serializationModel.Bar,
        Properties = serializationModel.Properties.ToDictionary(item => item.Key, pair => pair.Value.ToObject<string[]>())
    };

}