/// <summary>
        /// 获取菜单模块树型列表
        /// </summary>
        /// <param name="systemCode">子系统</param>
        /// <param name="isMenu">是否菜单(0/1)</param>
        public DataTable GetModuleTree(string systemCode, string isMenu = null)
        {
            if (string.IsNullOrEmpty(systemCode))
            {
                systemCode = "Base";
            }
            //读取选定子系统的菜单模块
            var manager = new BaseModuleManager(UserInfo, systemCode + "Module");
            // 获取所有数据
            var parameters = new List <KeyValuePair <string, object> >();

            if (ValidateUtil.IsInt(isMenu))
            {
                parameters.Add(new KeyValuePair <string, object>(BaseModuleEntity.FieldIsMenu, isMenu));
            }
            parameters.Add(new KeyValuePair <string, object>(BaseModuleEntity.FieldEnabled, 1));
            parameters.Add(new KeyValuePair <string, object>(BaseModuleEntity.FieldDeleted, 0));
            //2017.12.20增加默认的HttpRuntime.Cache缓存
            var cacheKey = "DataTable." + systemCode + ".ModuleTree." + isMenu;
            //var cacheTime = default(TimeSpan);
            var cacheTime = TimeSpan.FromMilliseconds(86400000);

            return(CacheUtil.Cache <DataTable>(cacheKey, () => manager.GetModuleTree(manager.GetDataTable(parameters, BaseModuleEntity.FieldSortCode)), true, false, cacheTime));
            //直接读取数据库
            //return manager.GetModuleTree(manager.GetModuleTree(manager.GetDataTable(parameters, BaseModuleEntity.FieldSortCode)));
        }