[ajax] MVC Return Partial View as JSON

Is there a way to return an HTML string from rendering a partial as part of a JSON response from MVC?

    public ActionResult ReturnSpecialJsonIfInvalid(AwesomenessModel model)
    {
        if (ModelState.IsValid)
        {
            if(Request.IsAjaxRequest()
                return PartialView("NotEvil", model);
            return View(model)
        }
        if(Request.IsAjaxRequest())
        {
            return Json(new { error=true, message = PartialView("Evil",model)});
        }
        return View(model);
    }

Instead of RenderViewToString I prefer a approach like

return Json(new { Url = Url.Action("Evil", model) });

then you can catch the result in your javascript and do something like

success: function(data) {
    $.post(data.Url, function(partial) { 
        $('#IdOfDivToUpdate').html(partial);
    });
}

Url.Action("Evil", model)

will generate a get query string but your ajax method is post and it will throw error status of 500(Internal Server Error). – Fereydoon Barikzehy Feb 14 at 9:51

Just Add "JsonRequestBehavior.AllowGet" on your Json object.