public string createComment(string Comment, int PostID)
        {
            try
            {
                using (var ctx = new CommentContext())
                {
                    Comment comment = new Comment()
                    {

                        CommentText = Comment,
                        PostID = PostID,
                        CommentDate = new DateTime()
                    };
                    ctx.Comments.Add(comment);
                    ctx.SaveChanges();
                }
                return "ok";
            }
            catch (Exception)
            {
                return "fail";
            }
        }
        public void ListViewComments_InsertItem()
        {
            var comment = new Server.Models.Comment();
            comment.CreatedOn = DateTime.Now;
            comment.UserId = User.Identity.GetUserId();
            comment.TopicId = int.Parse(Request.QueryString["id"]);
            TryUpdateModel(comment);
            if (ModelState.IsValid)
            {
                this.dbContext.Comments.Add(comment);
                this.dbContext.SaveChanges();
            }

            Response.Redirect("~/ViewTopic?id=" + Request.QueryString["id"]);
        }