Verdur Comments - Answer Overflow

c#
[JsonDerivedType(typeof(Bar), nameof(Bar))]
public class Foo
{
    public int IntField { get; set; }
}

public class Bar: Foo
{
    public string StringField { get; set; } = null!;
}

public class FooWrapper
{
    public Foo Foo { get; set; } = null!;
}

c#
[JsonDerivedType(typeof(Bar), nameof(Bar))]
public class Foo
{
    public int IntField { get; set; }
}

public class Bar: Foo
{
    public string StringField { get; set; } = null!;
}

public class FooWrapper
{
    public Foo Foo { get; set; } = null!;
}

Hub:

c#
public class MyHub : Hub
{
    public void SendFoo()
    {
        Foo foo = new Bar { IntField = 1, StringField = "hello" };

        var wrapper = new FooWrapper { Foo = foo };
        Clients.All.SendAsync("ReceiveFoo", wrapper);
        Clients.All.SendAsync("ReceiveFoo", foo);
    }
}

c#
public class MyHub : Hub
{
    public void SendFoo()
    {
        Foo foo = new Bar { IntField = 1, StringField = "hello" };

        var wrapper = new FooWrapper { Foo = foo };
        Clients.All.SendAsync("ReceiveFoo", wrapper);
        Clients.All.SendAsync("ReceiveFoo", foo);
    }
}

When I'm sending foo, json serializator doesn't include $type property to json. When I'm sending wrapper, json serializator includes $type property to json.

22 replies

CC#

•Created by Verdur on 1/4/2024 in #help

✅ Complicated error with C# SignalR client

Yes, I'm using System.Text.Json. There is no problem with manual serialization, but when I pass a value to signalr's SendAsync function it doesn't serialize it's value with $type property

22 replies

CC#

•Created by Verdur on 1/4/2024 in #help

✅ Complicated error with C# SignalR client

Just checked it and looks like problem is in serializer indeed. It doesn't provide $type element if I'm serailizing base class, but if I serialize wrapper class that contains base class it does provide $type element

22 replies

CC#

•Created by Verdur on 1/4/2024 in #help

✅ Complicated error with C# SignalR client

I have JsonDerivedType attribute on my base class, but connection.on still refuses to convert data to the derived classes, it just stops converting at the type you passed in generic

22 replies

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