JSON 序列化列表<KeyValuePair<string, object>> [英] JSON Serialize List<KeyValuePair<string, object>>
问题描述
我在一个 Web API 项目中使用了一个字典,它在 JSON 中序列化:
I used a Dictionary in a Web API project, which is serializing like that in JSON:
{"keyname":{objectvalue},"keyname2:"....
由于我有重复的键,我不能再使用字典类型了,而是现在我使用 List
Since I have duplicate keys I could't use Dictionary type any more, and instead now I'm using List<KeyValuePair<string,object>>.
但这就是这样的序列化:
But this is serializing that way:
[{"Key":"keyname","Value":"objectvalue"}...
有没有办法让 List
像字典一样序列化?
Is there a way to have the List<KeyValuePair>
serialize the same way a dictionary does?
谢谢.
推荐答案
如果您使用 Newtonsoft Json.NET 库,您可以执行以下操作.
If you use the Newtonsoft Json.NET library you can do the following.
定义一个转换器,以您想要的方式编写键/值对列表:
Define a converter to write the list of key/value pairs the way you want:
class MyConverter : JsonConverter
{
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
List<KeyValuePair<string, object>> list = value as List<KeyValuePair<string, object>>;
writer.WriteStartArray();
foreach (var item in list)
{
writer.WriteStartObject();
writer.WritePropertyName(item.Key);
writer.WriteValue(item.Value);
writer.WriteEndObject();
}
writer.WriteEndArray();
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
// TODO...
}
public override bool CanConvert(Type objectType)
{
return objectType == typeof(List<KeyValuePair<string, object>>);
}
}
然后使用转换器:
var keyValuePairs = new List<KeyValuePair<string, object>>
{
new KeyValuePair<string, object>("one", 1),
new KeyValuePair<string, object>("two", 2),
new KeyValuePair<string, object>("three", 3)
};
JsonSerializerSettings settings = new JsonSerializerSettings { Converters = new [] {new MyConverter()} };
string json = JsonConvert.SerializeObject(keyValuePairs, settings);
这将生成 [{"one":1},{"two":2},{"three":3}]
这篇关于JSON 序列化列表<KeyValuePair<string, object>>的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!