GZipHelper /// <summary>/// GZip压缩解压缩帮助类/// </summary>public class GZipHelper{/// <summary>/// GZip压缩/// </summary>/// <param name="data">The data.</param>/// <returns></returns>public static byte[] Compress(byte[] data){MemoryStream ms = new MemoryStream();GZipStream stream = new GZipStream(ms, CompressionMode.Compress);stream.Write(data, 0, data.Length);stream.Close();return ms.ToArray();}/// <summary>/// GZip解压缩/// </summary>/// <param name="data">The data.</param>/// <returns></returns>public static byte[] Decompress(byte[] data){MemoryStream ms = new MemoryStream();ms.Write(data, 0, data.Length);ms.Position = 0;GZipStream stream = new GZipStream(ms, CompressionMode.Decompress);MemoryStream temp = new MemoryStream();byte[] buffer = new byte[1024];while (true){int read = stream.Read(buffer, 0, buffer.Length);if (read <= 0){break;}else{temp.Write(buffer, 0, buffer.Length);}}stream.Close();return temp.ToArray();}}

SavePageStateToPersistenceMediumprotected override void SavePageStateToPersistenceMedium(object state){string viewState = new ObjectStateFormatter().Serialize(state);byte[] data = Convert.FromBase64String(viewState);byte[] compressedData = ViewStateHelper.Compress(data);string str = Convert.ToBase64String(compressedData);ClientScript.RegisterHiddenField("__ARGVVIEWSTATE", str);}

LoadPageStateFromPersistenceMediumprotected override object LoadPageStateFromPersistenceMedium(){string viewstate = Request.Form["__ARGVVIEWSTATE"];byte[] data = Convert.FromBase64String(viewstate);byte[] uncompressedData = ViewStateHelper.Decompress(data);string str = Convert.ToBase64String(uncompressedData);return new ObjectStateFormatter().Deserialize(str);}

Savestatic private System.IO.DirectoryInfo Dir = new System.IO.DirectoryInfo(System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"App_Data\ViewState\"));protected override void OnPreInit(System.EventArgs e){if (!Dir.Exists)Dir.Create();else{DateTime nt = DateTime.Now.AddSeconds(-5);foreach (System.IO.FileInfo f in Dir.GetFiles()){if (f.CreationTime < nt)f.Delete();}}base.OnPreInit(e);}/// <summary>/// Saves any view-state and control-state information for the page./// </summary>/// <param name="state"></param>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 = System.IO.Path.Combine(Dir.FullName, viewStateID);System.Threading.ThreadPool.QueueUserWorkItem((obj) => System.IO.File.WriteAllText(fn, value)); //或者只写 File.WriteAllText(fn, value)Cache.Insert(viewStateID, value);base.SavePageStateToPersistenceMedium(viewStateID);}/// <summary>/// 将所有保存的视图状态信息加载到 <see cref="T:System.Web.UI.Page"/> 对象。/// </summary>/// <returns>保存的视图状态。</returns>protected override object LoadPageStateFromPersistenceMedium(){string viewStateID = (string)((Pair)base.LoadPageStateFromPersistenceMedium()).Second;string stateStr = (string)Cache[viewStateID];if (stateStr == null){string fn = System.IO.Path.Combine(Dir.FullName, viewStateID);stateStr = System.IO.File.ReadAllText(fn);}elseCache.Remove(viewStateID);return new ObjectStateFormatter().Deserialize(stateStr);}