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ÈÃViewState ±£´æÓÚ·þÎñÆ÷¶ËÎļþ (asp.net C#)

½«ViewState³Ö¾Ã»¯±£³ÖÔÚ·þÎñÆ÷¶ËÎļþµÄ´úÂ룬ÕâÑùViewState²»Õ¼ÓÃÍøÂç´ø¿í£¬Òò´ËÆä´æÈ¡Ö»ÊÇ·þÎñÆ÷µÄ´ÅÅ̶Áȡʱ¼ä¡£²¢ÇÒËüºÜС£¬¿ÉÒÔ˵ÊÇ´ÅÅÌËæ±ãתһȦ¾ÍÄÜͬʱ¶ÁÈ¡ºÃ¶àViewState£¬Òò´Ë¿ÉÒÔ˵“²»Õ¼Ê±¼ä”¡£ÎªÁËÔÙ“²»Õ¼´ÅÅÌʱ¼ä”£¬ÎÒ»¹Ê¹ÓÃÁË»º´æ¡£
´´½¨Ò»¸ö»ùÀà:
public class
BasePage : System.Web.UI.Page
{
protected override object
LoadPageStatefromPersistenceMedium()
{
var viewStateID = (string)((Pair)base.LoadPageStatefromPersistenceMedium()).Second;
var stateStr = (string)Cache[viewStateID];
if (stateStr == null)
{
var 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)
{
var value = new ObjectStateFormatter().Serialize(state);
var viewStateID = (DateTime.Now.Ticks + (long)this.GetHashCode()).ToString(); //²úÉúÀëÉ¢µÄidºÅÂë
var fn = Path.Combine(this.Request.PhysicalApplicationPath, @"App_Data/ViewState/" + viewStateID);
ThreadPool.QueueUserWorkItem(obj => File.WriteAllText(fn, value));
Cache.Insert(viewStateID, value);
base.SavePageStateToPersistenceMedium(viewStateID);
}

}
}
Global.asax,ÒÔÏ´úÂëÒ²¿ÉÒÔ²»Óãº
protected void
Application_Start(object sender, EventArgs e)
{
DirectoryInfo dir = new DirectoryInfo(this.Server.MapPath("~/App_Data/ViewState/"));
if (!dir.Exists)
dir.Create();
else
{
DateTime nt = DateTime.Now.AddHours(-0.3); //ɾ³ý15·ÖÖÓÒÔÇ°µÄ»º´æÎļþ
FileInfo[] fiArr = dir.GetFiles();
foreach (FileInfo f in fiArr)
{
if (f.CreationTime < nt)
{
f.Delete();
}
}
}
}
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