Return Custom HTTP Status Code from WebAPI 2 endpoint

Question

I\'m working on a service in WebAPI 2, and the endpoint currently returns an IHttpActionResult. I\'d like to return a status code 422, but since it\'s

Answer 1

I'm using a custom Filter in my controllers that catches any exceptions and returns custom error results so I needed a way to return a custom message response based on the exception message.

I'm using JsonResult (found in the Microsoft.AspNetCore.Mvc namespace) to return a custom status code and messagesas such:

public class DomainViolationFilter : ExceptionFilterAttribute
    {
        public override void OnException(ExceptionContext context)
        {
            switch (context.Exception)
            {
                case EntityNotFoundException e:
                    JsonResult toReturn = new JsonResult(e);
                    toReturn.StatusCode = 404;
                    context.Result = toReturn;
                    return;
            }
        }
    }

In my case, I'm serializing directly the exception object (ex) for simplicity but you should be returning only the relevant (and safe) data, or whatever you need in your use case.