将对象反序列化为Dictionary
(JsonConvert.DeserializeObject<IDictionary<string,object>>(json)
)时,嵌套对象被反序列化为JObject
s。是否可以强制嵌套对象反序列化为Dictionary
?
答案 0 :(得分:38)
我找到了一种方法,通过提供Dictionary<string,object>
实现将所有嵌套对象转换为CustomCreationConverter
:
class MyConverter : CustomCreationConverter<IDictionary<string, object>>
{
public override IDictionary<string, object> Create(Type objectType)
{
return new Dictionary<string, object>();
}
public override bool CanConvert(Type objectType)
{
// in addition to handling IDictionary<string, object>
// we want to handle the deserialization of dict value
// which is of type object
return objectType == typeof(object) || base.CanConvert(objectType);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.StartObject
|| reader.TokenType == JsonToken.Null)
return base.ReadJson(reader, objectType, existingValue, serializer);
// if the next token is not an object
// then fall back on standard deserializer (strings, numbers etc.)
return serializer.Deserialize(reader);
}
}
class Program
{
static void Main(string[] args)
{
var json = File.ReadAllText(@"c:\test.json");
var obj = JsonConvert.DeserializeObject<IDictionary<string, object>>(
json, new JsonConverter[] {new MyConverter()});
}
}
答案 1 :(得分:1)
替代/更新:
我需要反序列化String
的词典字典,并使用当前的Json.NET(5.0)我不必创建CustomConverter,我刚刚使用(在VB.Net中):
JsonConvert.DeserializeObject(Of IDictionary(Of String, IDictionary(Of String, String)))(jsonString)
或者,在C#中:
JsonConvert.DeserializeObject<IDictionary<String, IDictionary<String, String>>(jsonString);
答案 2 :(得分:0)
当我遇到这个问题时,我有一个非常相似但略微复杂的需求。起初我以为我可以适应已接受的答案,但这似乎有点复杂,我最终采取了不同的方法。我试图将现代JSON层放在旧版C ++ API之上。我将为您保留详细信息,仅说要求可以归结为:
JSON对象成为Dictionary<string,object>
。
JSON数组变为List<object>
。
JSON值成为相应的原始CLR值。</ p>
对象和数组可以无限嵌套。
我首先将请求字符串反序列化为Newtonsoft JSON对象,然后调用我的方法以根据上述要求进行转换:
var jsonObject = JsonConvert.DeserializeObject(requestString);
var apiRequest = ToApiRequest(jsonObject);
// call the legacy C++ API ...
这是我的方法,可以转换为API期望的结构:
private static object ToApiRequest(object requestObject)
{
switch (requestObject)
{
case JObject jObject: // objects become Dictionary<string,object>
return ((IEnumerable<KeyValuePair<string, JToken>>) jObject).ToDictionary(j => j.Key, j => ToApiRequest(j.Value));
case JArray jArray: // arrays become List<object>
return jArray.Select(ToApiRequest).ToList();
case JValue jValue: // values just become the value
return jValue.Value;
default: // don't know what to do here
throw new Exception($"Unsupported type: {requestObject.GetType()}");
}
}
我希望有人可以找到这种方法。