<ul class="page-sidebar-menu page-sidebar-menu-hover-submenu " data-keep-expanded="false" data-auto-scroll="true" data-slide-speed="200">
          <li class="start" id="1">
            <a href="/Home/index">
              <i class="icon-home"></i>
              <span class="title">首页</span>
              <span class="selected"></span>
              <span class="arrow open"></span>
            </a>
          </li>
          <li id="2">
            <a href="javascript:;">
              <i class="icon-basket"></i>
              <span class="title">行业动态</span>
              <span class="selected"></span>
              <span class="arrow open"></span>
            </a>
            <ul class="sub-menu">
              <li class="heading" style="font-size:14px;color:yellow">
                <i class="icon-home"></i>
                行业动态
              </li>
              <li>
                <a href="#">
                  <i class="icon-home"></i>
                  <span class="badge badge-danger">4</span>
                  政策法规
                </a>
              </li>
              <li>
                <a href="#">
                  <i class="icon-basket"></i>
                  <span class="badge badge-warning">4</span>
                  通知公告
                </a>
              </li>
              <li>
                <a href="#">
                  <i class="icon-tag"></i>
                  <span class="badge badge-success">4</span>
                  动态信息
                </a>
              </li>
            </ul>
          </li>
        </ul>

/// <summary>
    /// 重写基类在Action执行之前的处理
    /// </summary>
    /// <param name="filterContext">重写方法的参数</param>
    protected override void OnActionExecuting(ActionExecutingContext filterContext)
    {
      base.OnActionExecuting(filterContext);
      //得到用户登录的信息
      CurrentUser = Session["UserInfo"] as UserInfo;
      if (CurrentUser == null)
      {
        Response.Redirect("/Login/Index");//如果用户为空跳转到登录界面
      }
      else
      {
        //设置授权属性，然后赋值给ViewBag保存
        ConvertAuthorizedInfo();
        ViewBag.AuthorizeKey = AuthorizeKey;
        //登录信息统一设置
        ViewBag.FullName = CurrentUser.FullName;
        ViewBag.Name = CurrentUser.Name;
        ViewBag.MenuString = GetMenuString();
        //ViewBag.MenuString = GetMenuStringCache(); //使用缓存，隔一段时间更新
      }
    }

 #region 定义的格式模板
      // javascript:;
      // {0}?tid={1}
      var firstTemplate = @"
      <li id='{3}'>
        <a href='{0}'>
          <i class='{1}'></i>
          <span class='title'>{2}</span>
          <span class='selected'></span>
          <span class='arrow open'></span>
        </a>";
      var secondTemplate = @"
        <li class='heading' style='font-size:14px;color:yellow'>
          <i class='{0}'></i>
          {1}
        </li>";
      var thirdTemplate = @"
        <li id='{3}'>
          <a href='{0}'>
            <i class='{1}'></i>
            {2}
          </a>
        </li>";
      var firstTemplateEnd = "</li>";
      var secondTemplateStart = "<ul class='sub-menu'>";
      var secondTemplateEnd = "</ul>"; 
      #endregion

 //三级
            icon = subNodeInfo.WebIcon;
            //tid 为顶级分类id，sid 为第三级菜单id
            tmpUrl = string.Format("{0}{1}tid={2}&sid={3}", subNodeInfo.Url, GetUrlJoiner(subNodeInfo.Url), info.ID, subNodeInfo.ID);
            url = (!string.IsNullOrEmpty(subNodeInfo.Url) && subNodeInfo.Url.Trim() != "#") ? tmpUrl : "javascript:;";
            sb = sb.AppendFormat(thirdTemplate, url, icon, subNodeInfo.Name, subNodeInfo.ID);

 public string GetMenuStringCache()
    {
      string itemValue = MemoryCacheHelper.GetCacheItem<string>("GetMenuStringCache", delegate()
        {
          return GetMenuString();
        },
        null, DateTime.Now.AddMinutes(5) //5分钟以后过期，重新获取
      );
      return itemValue;
    }