IActionResult Return Types and StatusCodes quick reference

I’m always forgetting which return types are available directly from ASP.Net controllers, so have created a quick listing here.

For general information on HTTP Status codes see
https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

ASP.Net Core 2.2

All Status Codes:

https://docs.microsoft.com/en-gb/dotnet/api/microsoft.aspnetcore.http.statuscodes?view=aspnetcore-2.2

ControllerBase IActionResult Return Types

  • OK (200)
  • BadRequest (400)
  • Forbid (403)
  • LocalRedirect (302)
  • LocalRedirectPermanent (301)
  • LocalRedirectPermanentPreserve (308)
  • LocalRedirectPermanentPreserveMethod (307)
  • NoContent (204)
  • NotFound (404)
  • RedirectToAction (302)
  • RedirectToActionPermanent (301)
  • RedirectToActionPermanentPreserve (308)
  • RedirectToActionPermanentPreserveMethod (307)
  • RedirectToPage (302)
  • RedirectToPagePermanent (301)
  • RedirectToPagePermanentPreserve (308)
  • RedirectToPagePermanentPreserveMethod (307)
  • RedirectToPage (302)
  • RedirectToPagePermanent (301)
  • RedirectToPagePermanentPreserve (308)
  • RedirectToPagePermanentPreserveMethod (307)
  • StatusCode (set own status code)
    • Use 409 – Conflict, for updates that fail due to conflicts such as already exists etc..
  • Unauthorized (401)
  • UnprocessableEntity (422)
  • ValidationProblem (400)

ApiController MVC Compatibility Shim

https://docs.microsoft.com/en-us/dotnet/api/system.web.http.apicontroller?view=aspnetcore-2.2

  • OK (200)
  • BadRequest (400)
  • Conflict (409)
  • Created (201)
  • CreatedAtRoute (201)
  • InternalServerError (500)
  • NotFound (404)
  • Redirect (302)
  • RedirectToRoute (302)
  • StatusCode (set own status code)
    • Use 409 – Conflict, for updates that fail due to conflicts such as already exists etc..
  • Unauthorized (401)
  • UnprocessableEntity (422)
  • ValidationProblem (400)

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