private static void ViewStateTracker(object sender, object e)
{
var bounds = Window.Current.Bounds;
var windowSize = new Size(bounds.Width, bounds.Height);
_timer.Interval = CalculateTimerInterval(ViewStateHelper.GetViewState(ApplicationView.GetForCurrentView(), windowSize));
}
/// <summary>
/// 重写LoadPageStateFromPersistenceMedium()方法。在这个方法中，解压ViewState。
/// </summary>
/// <returns></returns>
protected override object LoadPageStateFromPersistenceMedium()
{
string viewstate = Request.Form["__MYVIEWSTATE"];
byte[] data = Convert.FromBase64String(viewstate);
byte[] uncompressedData =
ViewStateHelper.Decompress(data);
string str = Convert.ToBase64String(uncompressedData);
LosFormatter formatter = new LosFormatter();
return(formatter.Deserialize(str));
}
/// <summary>
/// 重写SavePageStateToPersistenceMedium()方法。在这个方法中，压缩ViewState并存储它到隐藏域中。
/// </summary>
/// <param name="state"></param>
protected override void SavePageStateToPersistenceMedium(object state)
{
LosFormatter formatter = new LosFormatter();
StringWriter writer = new StringWriter();
formatter.Serialize(writer, state);
string viewState = writer.ToString();
byte[] data = Convert.FromBase64String(viewState);
byte[] compressedData = ViewStateHelper.Compress(data);
string str = Convert.ToBase64String(compressedData);
ClientScript.RegisterHiddenField("__MYVIEWSTATE", str);
}
public string GetCallbackResult()
{
if (this.callbackException == null)
{
string result;
try
{
Hashtable hashtable = new Hashtable();
hashtable["Items"] = this.Items;
hashtable["Cells"] = this.GetCells();
if (this.EnableViewState)
{
using (StringWriter stringWriter = new StringWriter())
{
LosFormatter losFormatter = new LosFormatter();
losFormatter.Serialize(stringWriter, ViewStateHelper.ToHashtable(this.ViewState));
hashtable["VsUpdate"] = stringWriter.ToString();
}
}
result = SimpleJsonSerializer.Serialize(hashtable);
}
catch (Exception ex)
{
if (HttpContext.Current.IsDebuggingEnabled)
{
result = "$$$" + ex;
}
else
{
result = "$$$" + ex.Message;
}
}
return(result);
}
if (HttpContext.Current.IsDebuggingEnabled)
{
return("$$$" + this.callbackException);
}
return("$$$" + this.callbackException.Message);
}