c# - 根据类型反序列化json字符串

Question

有这样的 json 字符串(我无法控制发布者):

{
  "TypeName": "Type1"
}

{
  "TypeName": "Type1"
}

这是动态反序列化 json 字符串的可接受方式吗？:

public class DeserializationFactory
{
    public static IPoco GetEvent(string jsonString)
    {
        var o = JObject.Parse(jsonString);
        IPoco poco = null;
        switch (o["TypeName"].ToString())
        {
        case "Type1":
            poco = JsonConvert.DeserializeObject<Type1>(jsonString);
            break;

        case "Type2":
            poco = JsonConvert.DeserializeObject<Type2>(jsonString);
            break;
        }
        return poco;
    }
}

Answer 1

你可以试试JsonSubtypes转换器实现和此布局:

    [JsonConverter(typeof(JsonSubtypes), "TypeName")]
    [JsonSubtypes.KnownSubType(typeof(Type1), "Type1")]
    [JsonSubtypes.KnownSubType(typeof(Type2), "Type2")]
    public interface IPoco
    {
        string TypeName { get; }
    }

    public class Type1 : IPoco
    {
        public string TypeName { get; } = "Type1";
        /* ... */
    }

    public class Type2 : IPoco
    {
        public string TypeName { get; } = "Type2";
        /* ... */
    }