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

For this you may need to use an Action Filter Attribute. Nothing fancy. Just create a class and inherit it from ActionFilterAttribute class in c#. Then override a method named OnActionExecuting to implement this. Then just use this filter on the head of any controller. Following is a demo.

On the condition when you need to produce custom status code based message in ActionFilterAttribute you can write in following way:

        if (necessity_to_send_custom_code)
        {
            actionContext.Response = actionContext.Request.CreateResponse((HttpStatusCode)855, "This is custom error message for you");
        }

Hope this helps.