public ActionResult TextSearch(string userId, string keyword, int numOnePage, int pageIndex)
 {   
     //知识分类  知识标题  知识标签
     using (RRDLEntities db = new RRDLEntities())
     {
         keyword = System.Web.HttpUtility.UrlDecode(keyword);
         AriticleService articleService = new AriticleService(db);
         List<Ariticle> list = new List<Ariticle>();
         list = articleService.PCSearchAriticles(userId, keyword, numOnePage, pageIndex, db);
         int count = articleService.PCSearchAriticlesCount(userId, keyword, db);
         List<AriticleViewModel> Viewlist = SimplifyAriticle(list);
         string result = JsonConvert.SerializeObject(Viewlist);
         result = result + "ContentAndCount" + count;
         return Content(result);
     }
 }