去掉.net页面中的<input type="hidden" name="VIEWSTATE" id="VIEWSTATE"

最新推荐文章于 2017-04-21 09:57:13 发布

转载最新推荐文章于 2017-04-21 09:57:13 发布 · 1k 阅读

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#input #.net #string #object #pair #cache

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本文介绍了一种优化ViewState存储的方法，通过将ViewState数据缓存并持久化到文件系统中，减轻服务器内存压力，适用于ViewState数据量大的场景。

        #region 解决ViewState过于庞大的问题
        //由于这里添加了目录,所以要建立App_Data/ViewState目录. 
        protected override object LoadPageStateFromPersistenceMedium()
        {
            string viewStateID = (string)((Pair)base.LoadPageStateFromPersistenceMedium()).Second;
            string stateStr = (string)Cache[viewStateID];
            if (stateStr == null)
            {
                string fn = Path.Combine(this.Request.PhysicalApplicationPath, @"App_Data/ViewState/" + viewStateID);
                stateStr = File.ReadAllText(fn);
            }
            return new ObjectStateFormatter().Deserialize(stateStr);
        }
        protected override void SavePageStateToPersistenceMedium(object state)
        {
            string value = new ObjectStateFormatter().Serialize(state);
            string viewStateID = (DateTime.Now.Ticks + (long)this.GetHashCode()).ToString(); //产生离散的id号码 
            string fn = Path.Combine(this.Request.PhysicalApplicationPath, @"App_Data/ViewState/" + viewStateID);
            //ThreadPool.QueueUserWorkItem(File.WriteAllText(fn, value)); 
            File.WriteAllText(fn, value);
            Cache.Insert(viewStateID, value);
            base.SavePageStateToPersistenceMedium(viewStateID);
        }
        #endregion