When to use JsonResult over ActionResult

Question

I\'ve been unable to find a concrete answer regarding this question. I\'ve viewed posts and subsequent posts from this question and elsewhere but all I\'ve really come out o

Answer 1

Actually there is no reasons to use JsonResult as return type of Action methods. In this case it is better to use abstract class ActionResult to follow polymorphic principles.

By calling return Json(value) you are actually calling helper method of Controller class which looks like:

protected internal virtual JsonResult Json(object data, string contentType, Encoding contentEncoding, JsonRequestBehavior behavior)
{
    return new JsonResult
    {
        Data = data,
        ContentType = contentType,
        ContentEncoding = contentEncoding,
        JsonRequestBehavior = behavior
    };
}

As we can see - Json helper method it instantiate JsonResult anyway.