public ActionResult AddFileToTitle(string wikiname, int tid,HttpPostedFileBase file, ViewTitleFile mod)
        {
            try
            {
                if (CommonTools.isEmpty(wikiname) && tid <= 0)
                {
                    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
                }
                mod.File = new WikiFile();
                WikiTitle title = CommonTools.titlemngr.GetTitlebyId(wikiname, tid);
                mod.Title = title;
                if ( mod !=null && mod.File !=null && mod.Title !=null && file.ContentLength>0)
                {
                    WikiFile fmod = mod.File;

                    this.filemngr.AddFile(wikiname, mod.File, file, tid, CommonTools.usrmng.GetUser(this.User.Identity.Name));
                }
                return View(mod);
            }
            catch (Exception ex)
            {

                CommonTools.ErrorReporting(ex);
                return new HttpStatusCodeResult(System.Net.HttpStatusCode.InternalServerError);
            }
        }
        public ActionResult AddFileToTitle(string wikiname,int tid)
        {
            try
            {
                if (CommonTools.isEmpty(wikiname) && tid <= 0)
                {
                    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
                }
                WikiTitle title = CommonTools.titlemngr.GetTitlebyId(wikiname, tid);
                Wiki wk = CommonTools.wkmngr.GetWiki(wikiname);
                 if (wk==null  )
                {
                    return HttpNotFound();
                }
                 if(title == null)
                {
                    return HttpNotFound();
                }
                ViewTitleFile mod = new ViewTitleFile();
                mod.File = new WikiFile();
                mod.Title = title;
                mod.ToBeAdded = true;

                return View(mod);
            }
            catch (Exception ex)
            {

                CommonTools.ErrorReporting(ex);
                return new HttpStatusCodeResult(System.Net.HttpStatusCode.InternalServerError);
            }
        }