SignalR .NET Core camelCase JSON Contract Resolver

Question

Using .NET Core RC2. Got SignalR working, but trying to get it returning camelCase properties in JSON.

For APIs I'm using...

services.AddMvc().AddJsonOptions(o => {
    o.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
});

Maybe there's just nothing in place yet for SignalR (after all, it's not even supposed to work yet...), but wondering if anyone's figured it out yet? I've tried a few things like...

services.AddTransient<IContractResolver, CamelCasePropertyNamesContractResolver>();

... but no go.

Anyone got this working yet?

Answer 1

In SignalR 3.0 you can do this with the following statement, as described in the Microsoft Docs

services.AddSignalR()
  .AddNewtonsoftJsonProtocol(
    options =>
      options.PayloadSerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver()
  );

Answer 2

In .NET Core 3.0, using System.Text.Json

 services.AddSignalR().AddJsonProtocol(options =>
        {
            options.PayloadSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
        });