ViewState压缩

/// <summary>
///CompressViewState 的摘要说明
/// </summary>
public class CompressViewState:System.Web.UI.Page
{
	public CompressViewState()
	{
		//
		//TODO: 在此处添加构造函数逻辑
		//
	}


    protected override object LoadPageStateFromPersistenceMedium()
    {
        PageStatePersister pageStatePersister = this.PageStatePersister;
        pageStatePersister.Load();
        string vState = pageStatePersister.ViewState.ToString();
        byte[] pBytes = System.Convert.FromBase64String(vState);
        pBytes = Decompress(pBytes);
        LosFormatter mFormat = new LosFormatter();
        object ViewState = mFormat.Deserialize(System.Convert.ToBase64String(pBytes));
        return new Pair(pageStatePersister.ControlState, ViewState);




    }


    protected override void SavePageStateToPersistenceMedium(object pViewState)
    {
        Pair pair;
        PageStatePersister pageStatePersister = this.PageStatePersister;
        object ViewState;
        if (pViewState is Pair)
        {
            pair = ((Pair)pViewState);
            pageStatePersister.ControlState = pair.First;
            ViewState = pair.Second;

        }
        else
        {
            ViewState = pViewState;
        }


        LosFormatter mFormat = new LosFormatter();
        StringWriter mWriter = new StringWriter();
        mFormat.Serialize(mWriter, ViewState);
        String mViewStateStr = mWriter.ToString();
        byte[] pBytes = System.Convert.FromBase64String(mViewStateStr);
        pBytes = Compress(pBytes);
        String vStateStr = System.Convert.ToBase64String(pBytes);
        pageStatePersister.ViewState = vStateStr;
        pageStatePersister.Save();
    }

    /// <summary>
    /// This Methhod takes the byte stream as parameter 
    /// and return a compressed bytestream.
    /// For compression it uses GZipStream
    /// </summary>
    /// <param name="b"></param>
    /// <returns></returns>
    private byte[] Compress(byte[] b)
    {
        MemoryStream ms = new MemoryStream();
        GZipStream zs = new GZipStream(ms, CompressionMode.Compress, true);
        zs.Write(b, 0, b.Length);
        zs.Close();
        return ms.ToArray();
    }


    /// <summary>
    /// This methhod takes the compressed byte stream as parameter
    /// and return a decompressed bytestream.
    /// </summary>
    /// <param name="b"></param>
    /// <returns></returns>
    private byte[] Decompress(byte[] b)
    {
        MemoryStream ms = new MemoryStream();
        GZipStream zs = new GZipStream(new MemoryStream(b), CompressionMode.Decompress, true);
        byte[] buffer = new byte[4096];
        int size;
        while (true)
        {
            size = zs.Read(buffer, 0, buffer.Length);
            if (size > 0)
                ms.Write(buffer, 0, size);
            else break;
        }
        zs.Close();
        return ms.ToArray();
    }
}

　　http://www.codeproject.com/Articles/101888/ViewState-Various-ways-to-reduce-performance-overh