//删除超时状态信息
DirectoryInfo dir = new DirectoryInfo(@"D:\alacun\App_Data\ViewState");
FileInfo[] finfo = dir.GetFiles();
for (int i = 0; i < finfo.Length; i++)
{
FileInfo f = new FileInfo(@"D:\alacun\App_Data\ViewState\" + finfo[i]);
DateTime news=DateTime.Now;
TimeSpan ts = news.Subtract(f.LastAccessTime).Duration();
if (ts.Minutes >DelectTime)
{
FilePicDelete(@"D:\alacun\App_Data\ViewState\" + finfo[i]);
}
}