How to set HTTP status code from ASP.NET MVC 3?

Question

We\'re using OpenWeb js libraries on the frontend, and they have a need for the .NET middle tier to send them a specific HTTP header status code when certain types of errors

Answer 1

There is extended discussion at What is the proper way to send an HTTP 404 response from an ASP.NET MVC action?

What you want to do is set Response.StatusCode instead of adding a Header.

public ActionResult TestError(string id) // id = error code
{
    Response.StatusCode = 400; // Replace .AddHeader
    var error = new Error();  // Create class Error() w/ prop
    error.ErrorID = 123;
    error.Level = 2;
    error.Message = "You broke the Internet!";

    return Json(error, JsonRequestBehavior.AllowGet);
}