How to configure json Name Case policy while using MinimalApi

Question

I'm trying to get result from my minimal API who configured in endpoints of my MVC web application my Get action configured like this :

            endpoints.MapGet(
                "HO-CFDZU4/api/Currency/Get", 
                [PermissionAuthorize(PermissionName.ReadCurrencyDictionary)] 
                async ([FromServicesAttribute] CurrencyService curency) =>
            {
                var result = await DataSourceLoader.LoadAsync(curency.Get(), new DataSourceLoadOptions());

                return Results.Ok(result);
            });

As result i get response with object where property names changed to lowercase, and its not suit for me. I want to get exactly same name in same case like i return form action.

To get similar effect in MVC i used this code :

            services
            .AddMvc()
            .AddFluentValidation(x => x.RegisterValidatorsFromAssembly(AppDomain.CurrentDomain.GetAssemblies().Where(x => x.FullName.Contains("ApplicationCore")).Single()))
            .AddMvcLocalization()
            .AddMvcOptions(options =>{})
            .AddRazorRuntimeCompilation()
            .AddJsonOptions(options =>
            {
                options.JsonSerializerOptions.PropertyNamingPolicy = null;
                options.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
            });

Which setup property naming policy for Json while using action in controllers, and i dont know how to setup same policy for minimalApi.

What Ive tried is to set [JsonPropertyName(name)] And it working good but we have lot of classes and i looking for more global solution.

I also tried configure JsonOptions globally like this:

        services.Configure<JsonOptions>(options =>
        {
            options.JsonSerializerOptions.PropertyNamingPolicy = null;
            options.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
        });

But it do nothing

You return Results.Ok(), if you want formatted json to return use Results.Json() which has optional JsonSerializerOption parameter — Ramin Quliyev, Dec 23 '22 at 07:48

Guru Stron · Accepted Answer · 2022-12-23T07:58:23.287

2

Use JsonOptions from Microsoft.AspNetCore.Http.Json namespace (docs):

services.Configure<JsonOptions>(options =>
{
    options.SerializerOptions.PropertyNamingPolicy = null;
    options.SerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
});

UPD

If your application uses both Minimal APIs endpoints and MVC ones, then you try to configure options from both namespaces:

services.Configure<Microsoft.AspNetCore.Http.Json.JsonOptions>(options =>
{
    options.SerializerOptions.PropertyNamingPolicy = null;
    options.SerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
});
services.Configure<Microsoft.AspNetCore.Mvc.JsonOptions>(options =>
{
    options.JsonSerializerOptions.PropertyNamingPolicy = null;
    options.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
});

edited Dec 23 '22 at 07:58

answered Dec 22 '22 at 14:16

Guru Stron

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As I said I already tried similar solution and its do not working for me. And your code snipped do not suit me because I use MVC Core Web application not MinimalApi solution, and in my case services configured just like I pasted in original post. – Igor Markiv Dec 23 '22 at 07:33
@игорьмаркив _"I use MVC Core Web application not MinimalApi solution"_ - your question explicitly says _"while using MinimalApi"_. If you need to use both Minimal APIs and MVC endpoints then setup `JsonOptions` from both namespaces using fully qualified names. – Guru Stron Dec 23 '22 at 07:38
I mean MinimalApi declaration in MVC WEB Route Endpoints that clearly seen from Code snipped what i provider in original post, but i don't use Separate MInimalApi Solution, and as i says i know how to set JsonOptions in services using IMVCbuilder but i dont know how to configure same thing using IEndpointRouteBuilder – Igor Markiv Dec 23 '22 at 07:48
Your Answer Working after small changes : builder.Services should be changed to services.Configure – Igor Markiv Dec 23 '22 at 07:57

How to configure json Name Case policy while using MinimalApi

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