Json转换继承字典的对象 [英] Json convert object which inherit dictionary
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问题描述
我有以下课程定义:
public class ElasticObject : Dictionary<string, object>
{
public int Id { get;set;}
}
var keyValues = new ElasticObject();
keyValues.Id= 200000;
keyValues.Add("Price", 12.5);
var json = JsonConvert.SerializeObject(keyValues,
new JsonSerializerSettings{NullValueHandling = NullValueHandling.Ignore});
已解析的json字符串为{"Price":12.5},该字符串无法包含Id属性,是否可以自定义json转换?
The parsed json string is {"Price":12.5} which fails to contain the Id property, is there any way to customize the json conversion?
推荐答案
您可以通过创建自定义的JsonConverter
类来实现.也许是这样的:
You can do this by making a custom JsonConverter
class. Perhaps something like this:
class ElasticObjectConverter : JsonConverter
{
public override bool CanConvert(Type objectType)
{
return (objectType == typeof(ElasticObject));
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
ElasticObject eobj = (ElasticObject)value;
var temp = new Dictionary<string, object>(eobj);
temp.Add("Id", eobj.Id);
serializer.Serialize(writer, temp);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var temp = serializer.Deserialize<Dictionary<string, object>>(reader);
ElasticObject eobj = new ElasticObject();
foreach (string key in temp.Keys)
{
if (key == "Id")
eobj.Id = Convert.ToInt32(temp[key]);
else
eobj.Add(key, temp[key]);
}
return eobj;
}
}
然后您将像这样使用它:
You would then use it like this:
var settings = new JsonSerializerSettings
{
NullValueHandling = NullValueHandling.Ignore,
Converters = new List<JsonConverter> { new ElasticObjectConverter() }
};
var keyValues = new ElasticObject();
keyValues.Id = 200000;
keyValues.Add("Price", 12.5);
var json = JsonConvert.SerializeObject(keyValues, settings);
上面生成的JSON看起来像这样:
The JSON produced by the above would look like this:
{"Price":12.5,"Id":200000}
这是您要寻找的吗?
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