public string ViewComment(int topic_id)
        {
            ArticalComments        c   = new ArticalComments();
            List <ArticalComments> lst = new List <ArticalComments>();

            lst = c.GetByTopicId(topic_id, con);

            return(JsonConvert.SerializeObject(lst));
        }
        // GET: ViewComment
        public ActionResult Index()
        {
            int                    id  = ViewBag.topic_id;
            ArticalComments        c   = new ArticalComments();
            List <ArticalComments> lst = new List <ArticalComments>();

            lst = c.GetByTopicId(id, con);

            return(View(lst.ToList()));
        }