我在Web API项目中使用了一个Dictionary,它正如JSON中那样序列化:
{"keyname":{objectvalue},"keyname2:"....
由于我有重复的键,我不能再使用Dictionary类型了,现在我正在使用List<KeyValuePair<string,object>>.
但这是以这种方式序列化:
[{"Key":"keyname","Value":"objectvalue"}...
有没有办法让List<KeyValuePair>
序列化与字典相同?
感谢。
答案 0 :(得分:33)
如果您使用Newtonsoft Json.NET库,则可以执行以下操作。
定义转换器以按您希望的方式编写键/值对列表:
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);
这会生成[{"one":1},{"two":2},{"three":3}]