问题描述
是否可以告诉我JSON.NET有JSON数据的字符串?例如。我有这样一个类:
Is it possible to tell JSON.NET I have a string with JSON data? E.g. I have a class like this:
public class Foo
{
public int Id;
public string RawData;
}
我用这样的:
which I use like this:
var foo = new Foo();
foo.Id = 5;
foo.RawData = @"{""bar"":42}";
我要被序列化这样的:
which I want to be serialized like this:
{"Id":5,"RawData":{"bar":42}}
基本上我有一块已经存储作为JSON非结构化可变长度的数据,我需要完全序列化对象包含此数据的一部分。
Basically I have a piece of unstructured variable-length data stored as JSON already, I need fully serialized object to contain this data as a part.
感谢
编辑:只是为了确保它是正确的理解,这是单向的序列化,即我并不需要它反序列化回同一个对象;其它系统应处理此输出。我需要RAWDATA的内容是JSON的一部分,而不是一个单纯的字符串。
Just to make sure it is understood properly, this is one-way serialization, i.e. I don't need it to deserialize back into same object; the other system shall process this output. I need content of RawData to be a part of JSON, not a mere string.
推荐答案
您需要一个转换器来做到这一点,这里有一个例子:
You need a converter to do that, here is an example:
public class RawJsonConverter : JsonConverter
{
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
writer.WriteRawValue(value.ToString());
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
throw new NotImplementedException();
}
public override bool CanConvert(Type objectType)
{
return typeof(string).IsAssignableFrom(objectType);
}
public override bool CanRead
{
get { return false; }
}
}
然后用它装饰类:
Then decorate your class with it:
public class Foo
{
public int Id;
[JsonConverter(typeof(RawJsonConverter))]
public string RawData;
}
然后,当你使用:
Then, when you use:
var json = JsonConvert.SerializeObject(foo,
new JsonSerializerSettings());
Console.WriteLine (json);
这是你的输出:
{"Id":5,"RawData":{"bar":42}}
希望它能帮助
编辑:我已经更新了我的一个更有效的解决答案,前面的人逼你来序列化到再反序列化,这并不
I have updated my answer for a more efficient solution, the previous one forced you to serialize to then deserialize, this doesn't.
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