IHttpActionResult method cannot return NotFound()

Question

I am developing a web API for my website and have ran into a problem.

At the moment, the API is supposed to return details from the specified user.

This is my controller for accounts:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Http;
using System.Net;
using RoditRepoAPIV2.Models;

namespace RoditRepoAPIV2.Controllers
{
    public class AccountController : Controller
    {
        Account[] products = new Account[] 
        { 
            //accounts will be added...
        };

        public IEnumerable<Account> GetAllAccounts()
        {
            return products;
        }

        public IHttpActionResult GetAccount(int id)
        {
            var account = products.FirstOrDefault((p) => p.Id == id);
            if (account == null)
            {
                return NotFound();
            }
            return Ok(account);
        }

    }
}

Although most of this code is copied from the tutorial here, Visual Studio complains that 'NotFound()' and 'Ok(account)' do not exist in the current context. I have updated all of the NuGet packages to version 5.1.2+ and I still get this error.

I have done some research and found that it seems to work for other people...

I would much appreciate it if anyone could respond with a working solution! Thank you.

Andrei · Accepted Answer · 2014-05-30 13:22:00Z

36

You need to inherit your controller from ApiConroller - that is where these methods are defined:

public class AccountController : ApiController

answered May 30, 2014 at 13:22

Andrei

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Matteus Barbosa · Accepted Answer · 2022-09-07 23:41:13Z

2

from aspnet core 6

Replace

return NotFound() and HttpNotFound();

with

return new StatusCodeResult(404);

answered Sep 7, 2022 at 23:41

Matteus Barbosa

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Comments

MarAnagn · Accepted Answer · 2025-06-06 09:50:25Z

0

You need to inherit your controller from ControllerBase, which means that your controller class should be:

ClassController : ControllerBase,

where Class, your controller name.

answered Jun 6 at 9:50

MarAnagn

1

1 Comment

MarAnagn Jun 6 at 9:53

At least for Asp.Net Core 3.1, 5.0 and after.

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