MaksIT.Results

MaksIT.Results is a .NET library for modeling operation outcomes as HTTP-aware result objects and converting them to IActionResult in ASP.NET Core.

Features

• Result and Result<T> models with status code, success flag, and messages.
• Static factory methods for common and extended HTTP status codes (1xx, 2xx, 3xx, 4xx, 5xx).
• Built-in conversion to IActionResult via ToActionResult().
• RFC 7807-style error payloads for failures (application/problem+json).
• Camel-case JSON serialization for response bodies; respects app-configured JsonSerializerOptions (e.g. AddJsonOptions with DefaultIgnoreCondition.WhenWritingNull).

Installation

Package Manager:

Install-Package MaksIT.Results

dotnet CLI:

dotnet add package MaksIT.Results

Target Framework

• .NET 10 (net10.0)

Quick Start

Create results

using MaksIT.Results;

Result ok = Result.Ok("Operation completed");
Result failed = Result.BadRequest("Validation failed");

Result<int> okWithValue = Result<int>.Ok(42, "Answer generated");
Result<string?> notFound = Result<string?>.NotFound(null, "Entity not found");

Convert between result types

using MaksIT.Results;

Result<int> source = Result<int>.Ok(42, "Value loaded");

// Result<T> -> Result<U>
Result<string?> mapped = source.ToResultOfType(v => v?.ToString());

// Result<T> -> Result
Result nonGeneric = source.ToResult();

Use in an ASP.NET Core controller

using MaksIT.Results;
using Microsoft.AspNetCore.Mvc;

public sealed class UsersController : ControllerBase {
  [HttpGet("{id:guid}")]
  public IActionResult GetUser(Guid id) {
    Result<UserDto?> result = id == Guid.Empty
      ? Result<UserDto?>.BadRequest(null, "Invalid id")
      : Result<UserDto?>.Ok(new UserDto(id, "maks"), "User loaded");

    return result.ToActionResult();
  }
}

public sealed record UserDto(Guid Id, string Name);

ToActionResult() Behavior

• Result success: returns status-code-only response.
• Result<T> success with non-null Value: returns JSON body + status code.
• Any failure: returns RFC 7807-style ProblemDetails JSON with:
  • status = result status code
  • title = "An error occurred"
  • detail = joined Messages
  • content type application/problem+json

JSON options

ObjectResult uses the same JsonSerializerOptions as your app when you configure them with AddJsonOptions:

builder.Services.AddControllers()
  .AddJsonOptions(options => {
    options.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
  });

If no options are registered, a default (camel-case) serializer is used.

Status Code Factories

• Informational: Result.Continue(...), Result.SwitchingProtocols(...), Result.Processing(...), etc.
• Success: Result.Ok(...), Result.Created(...), Result.NoContent(...), etc.
• Redirection: Result.Found(...), Result.PermanentRedirect(...), etc.
• Client error: Result.BadRequest(...), Result.NotFound(...), Result.TooManyRequests(...), etc.
• Server error: Result.InternalServerError(...), Result.ServiceUnavailable(...), etc.

Generic equivalents are available via Result<T>, for example Result<MyDto>.Ok(value, "message").

Contributing

See CONTRIBUTING.md.

Contact

If you have any questions or need further assistance, feel free to reach out:

• Email: maksym.sadovnychyy@gmail.com
• Reddit: MaksIT.Results: Streamline Your ASP.NET Core API Response Handling

License

See LICENSE.md.