/// <summary>

        /// 根据 cacheKey 获取缓存内容

        /// </summary>

        /// <param name="context">HttpContext</param>

        /// <param name="cacheName">key</param>

        /// <param name="cacheFunc">Func委托,该方法返回结果为要缓存的对象,当存在改缓存时,不会执行该委托的方法</param>

        /// <param name="timeoutHours">单位:小时,默认值为12</param>

        /// <returns>缓存内容</returns>

        public static Object GetCacheByName(HttpContextBase context,string cacheName,Func<object>cacheFunc,int timeoutHours=)

        {

            if (context.Cache[cacheName] == null)

            {

                context.Cache.Insert(cacheName, cacheFunc.Invoke(), null, DateTime.Now.AddHours(timeoutHours), Cache.NoSlidingExpiration);

            }

            return context.Cache[cacheName];

        }