反序列化抽象class实现.Net Core C#

Question

Short explanation: Project in Angular and.NetCore where I try to update a list of abstract classes in my backend. By creating a put request I update the container model which holds the list I want to update. The frontend serialises the container model with JSON.stringify();

When my put request reaches my endpoint it starts deserializing right away. And I get the exception: System.NotSupportedException: Deserialization of reference types without parameterless constructor is not supported. Type 'Tile'.

This exception does not surprise me because the abstract class can not be instantiated. So I tried using a custom JsonConverter which defines when to convert to which class. But this Converter never gets called. I have a breakpoint placed in the ReadJson method but the exception is thrown before it reaches the breakpoint.

Custom JsonConverter

Abstract model

Implementation of the abstract class

Put Endpoint

Update:

So after continuing for a couple of hours I found out that my project uses System.Text.Json.Serialization for serializing the object. The CostumConverter I created is a Newtonsoft. That's why it probably isn't called. Is there a way to specify to my project which to use? I have a startup.cs File where I think stuff like this might go.

Answer 1

you can use generic type parameter, allows you to specify an arbitrary type T to a method at compile time, without specifying a concrete type in the method or class declaration.

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/generics/generic-type-parameters