Wrong encoding when passing from controller to view using AJAX - how to fix?

Question

JavaScript

The controller has such a thing:
(specially simplified it)

//AJAX запрос на загрузку миниатюры
        [HttpPost]
        public ActionResult AddThumbnail()
        {
            HttpPostedFileBase image = Request.Files["fileInput"];
            switch (image.FileName)
            {
                case "noimg.jpg":
                    return new HttpStatusCodeResult(406, "Формат загруженной картинки не подходит");
                default:
                    return Json("Успешно загрузили");
            }
        }

For AJAX file uploads, I use the
jQuery Upload File Plugin

. The text passed to the constructor new HttpStatusCodeResult(406, "The format of the uploaded image does not match");
It is displayed in the view as follows:


Lebedev's decoder decoded the phrase as follows: The format of the loaded picture is not suitable → The format of the loaded picture is

not suitable
CP1252 → CP1251

Answer 1

Only ASCII characters are allowed in HTTP headers. Read more here: https://ru.stackoverflow.com/q/703298/213987