protected virtual void RaiseCallbackEvent (string eventArgs)
{
string[] clientData = eventArgs.Split ('|');
PageIndex = int.Parse (clientData[0]);
SortExpression = HttpUtility.UrlDecode (clientData [1]);
SortDirection = (SortDirection) int.Parse (clientData [2]);
RaisePostBackEvent (clientData[3]);
DataBind ();
}