public ActionResult DoDelete(string categoryName)
 {
     DataOperator dop = new DataOperator(Runtime.SqlConfig);
     dop.Delete(categoryName);
     Article mArticle = new Article();
     mArticle.ACategoryName = categoryName;
     var list = dop.Select(mArticle, "", "", 10, 0);     //cms系统要改
     foreach(var item in list)
     {
         var article = item as Article;
         article.ACategoryName = "0";
         dop.Update(article);
     }
     TemplateDataHelper.Categories = null;
     return Redirect("/Admin/Success.do");
 }