Asp.net core: Configure MVC to use camelCase for json serializer

Startup.cs

services.AddMvc().AddJsonOptions(options =>
            {
                options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                options.SerializerSettings.DefaultValueHandling = DefaultValueHandling.Include;
                options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
            });

Hi,

SerializerSettings is not available anymore with .net core 3.0, it has been replaced by JsonSerializerOptions which doesnt have ContractResolver , do you know by what do I need to replace it?

Hi @ranouf,

Honestly, I'm not sure as I didn't use it yet, but maybe this can help you: https://stackoverflow.com/a/58392418.

Thanks,

Thanks for your fast answer :)

The solution is to use "AddNewtonsoftJson" instead of "AddJsonOptions", like this no need to change the rest of your code

Hi !

      services.AddControllers(config =>
      {
        AuthorizationPolicy p = new AuthorizationPolicyBuilder().RequireAuthenticatedUser().Build();
        config.Filters.Add(new AuthorizeFilter(p));
      }).AddNewtonsoftJson(options =>
        {
          options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
          options.SerializerSettings.DefaultValueHandling = DefaultValueHandling.Include;
          options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
        }
      );

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddControllersWithViews().AddJsonOptions(opts => opts.JsonSerializerOptions.PropertyNamingPolicy = null);
    }

Default in .netcore5 hadd is casePascal