StrEnum.AspNetCore

Allows to use StrEnum string enums with ASP.NET Core.

Supports ASP.NET Core 6, 7, 8, and 9.

ASP.NET Core 5 supported in v2.0.0.

Installation

You can install StrEnum.AspNetCore using the .NET CLI:

dotnet add package StrEnum.AspNetCore

Usage

If you're using WebApplicationBuilder, add the call to AddStringEnums() into your Program.cs:

var builder = WebApplication.CreateBuilder(args);

builder.Services
    .AddControllers()
    .AddStringEnums();

If you're using the ASP.NET Core 3.1-5 IWebHostBuilder, call AddStringEnums() in the ConfigureServices method of your Startup.cs:

public void ConfigureServices(IServiceCollection services)
{
     services
         .AddControllers()
         .AddStringEnums();
}

All set. Let's now create a string enum and a model that contains it:

public class Sport : StringEnum<Sport>
{
    public static Sport TrailRunning = Define("TRAIL_RUNNING");
    public static Sport RoadCycling = Define("ROAD_CYCLING");
}

public class Race
{
    public string Name { get; set; }
    public Sport Sport { get; set; }
}

You can bind string enums to the request body and return them in the response. In your controller, add the following:

[HttpPost]
public ActionResult<Race> BodyPost([FromBody] Race race) // race.Sport is correctly deserialized
{
    return Ok(race); // race.Sport is serialized back
}

You can also bind string enums to a URL:

[HttpGet]
[Route("{sport}")]
public ActionResult<ResponseWithStrEnum> GetFromRoute(Sport sport) {...}

To a query string parameter:

[HttpGet]
[Route("get")]
public ActionResult<ResponseWithStrEnum> GetFromQuery([FromQuery]Sport sport) {...}
// `get?sport=trail_running` binds to Sport.TrailRunning

And to an array of query string parameters:

[HttpGet]
[Route("get")]
public ActionResult<ResponseWithStrEnum> GetFromQuery([FromQuery] Sport[] sports) {...}
// `get?sports=trail_running&sports=road_cycling` binds to [Sport.TrailRunning, Sport.RoadCycling]

License

Copyright © 2025 Dmytro Khmara.

StrEnum is licensed under the MIT license.