[英]json.net does not serialize properties from derived class
I'm using JSON.NET 6.0.1.我正在使用 JSON.NET 6.0.1。 When I use the
SerializeObject
method to serialize an object of my derived class, it serializes properties from base class only.当我使用
SerializeObject
方法序列化我的派生类的对象时,它仅序列化基类的属性。 Here is the code snippet:这是代码片段:
string v = JsonConvert.SerializeObject(
service,
Formatting.Indented,
new JsonSerializerSettings()
{
TypeNameHandling = TypeNameHandling.All
});
base class:基类:
[DataContract]
public abstract partial class DataEntity : IDataEntity, INotifyPropertyChanging, INotifyPropertyChanged
{
...
}
derived class:派生类:
[Table(Name = "dbo.mytable")]
public sealed class mytable : DataEntity
{
...
}
Am I missing something?我错过了什么吗?
Yes, you are missing the [DataContract]
attribute on the derived class.是的,您缺少派生类的
[DataContract]
属性。 You also need to add [DataMember]
to any properties or fields that you want serialized, if you haven't already added them.您还需要将
[DataMember]
添加到要序列化的任何属性或字段(如果尚未添加)。 Json.Net was changed in version 5.0 release 1 (April 2013) such that the [DataContract]
attribute is not inherited. Json.Net 在5.0 版本 1 (2013 年 4 月)中进行了更改,因此
[DataContract]
属性不会被继承。
Note that if you remove all instances of [DataContract]
and [DataMemeber]
from your classes, Json.Net behaves differently: in that case, the default behavior is for Json.Net to serialize all public properties, both in the base and derived classes.请注意,如果从类中删除
[DataContract]
和[DataMemeber]
所有实例,Json.Net 的行为会有所不同:在这种情况下,Json.Net 的默认行为是序列化基类和派生类中的所有公共属性.
Adding the attribute [JsonObject(MemberSerialization.OptOut)]
to your derived class will include all its public members to be serialized.将属性
[JsonObject(MemberSerialization.OptOut)]
到您的派生类将包括其所有要序列化的公共成员。
[Table(Name = "dbo.mytable")]
[JsonObject(MemberSerialization.OptOut)]
public sealed class mytable : DataEntity
{
...
}
Alternatively, if you only want certain properties of your derived class to be serialized you can add the attribute [JsonProperty]
to each one (This would be equivalent of adding [DataMember]
to each property along with [DataContract]
on the class).或者,如果您只想序列化派生类的某些属性,您可以将属性
[JsonProperty]
添加到每个属性(这相当于将[DataMember]
与类上的[DataContract]
一起添加到每个属性)。
JsonConvert.SerializeObject was only return {} for me. JsonConvert.SerializeObject 对我来说只是返回 {}。 I found that I needed to add a new constructor to the class before it serialized properly.
我发现我需要在类正确序列化之前向类添加一个新的构造函数。
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