c#如何为序列化指定自定义接口

Question

i got a Class Library myCore.dll it includes a class

public interface IMyClassA {
    public string A { get; set; }
    public string B { get; set; }
}

public class MyClassA: IMyClassA {
    public string A { get; set; }
    public string B { get; set; }
}

then i got a console project with a selfhosted http service. it references myCode.dll and does some interfacing with json via http. but i want to hide Member 'B' of MyClassA if i do serialization in this project. im using Newtonsoft.Json. But i dont want to reference Newtonsoft in myCode.dll to set the [JsonIgnore] Attribute on MyClassA.B.

so how do i create a custom interface in my console-project that inherits from IMyClassA?

Answer 1

You have to write a custom converter.

If you use NewtonSoft you will have two methods to override: ReadJson(...) and WriteJson(...), one is for serializing the other for deserializing. That way you can write you own code responsible for serializing and deserializing. Having your own code you can just ignore the member 'B' of MyClassA.

To register the converter, instead of using an anotation on your DTO

[JsonConverter(typeof(MyCustomConvreter))]
public interface IMyClassA {
    public string A { get; set; }
    public string B { get; set; }
}

which would lead to an undesired reference to Newtonsoft, you can do this to register the custom converter:

var jsonSerializer = new JsonSerializer();
jsonSerializer.Converters.Add(new MyCustomConverter());

Check NewtonSoft docs for a custom converter: https://www.newtonsoft.com/json/help/html/CustomJsonConverter.htm