public ActionResult DeleteAppBanner(int PKID) { string _ReturnStr = string.Empty; ShopsManager manager = new ShopsManager(); var _ExistedAppBanner = manager.GetAppShopBannerByPKID(PKID); if (_ExistedAppBanner == null) { _ReturnStr = "删除失败,当前图片不存在,请刷新页面重试"; } else { int i = manager.DeleteShopBannerByPKID(PKID); if (i > 0) { _ReturnStr = "0"; } else { _ReturnStr = "删除失败,服务器错误!"; } } return(Json(_ReturnStr, JsonRequestBehavior.AllowGet)); }