protected void SavePageStateToSession( Object vs )
{
switch( _vsst )
{
case ViewStateStorageType.Page:
base.SavePageStateToPersistenceMedium( vs );
break;
case ViewStateStorageType.SessionID: case ViewStateStorageType.SessionGUID:
{
String id;
if( _vsst == ViewStateStorageType.SessionID )
id = ViewStateID;
else
{
id = Guid.NewGuid().ToString( "N" );
Page.ClientScript.RegisterHiddenField( Hidden_ViewstateID, id );
}
using( MemoryStream stm = new MemoryStream() )
{
using( StreamWriter wr = new StreamWriter(stm, Encoding.ASCII) )
LosFmt.Serialize( wr, vs );
Session[ id ] = stm.ToArray();
}
}
break;
}
}
protected Object LoadPageStateFromSession()
{
switch( _vsst )
{
case ViewStateStorageType.Page:
return base.LoadPageStateFromPersistenceMedium();
case ViewStateStorageType.SessionID:
{
Object res = null;
String id = ViewStateID;
if( id != null && id.Length != 0 )
{
res = Session[ id ];
if( res != null )
{
using( MemoryStream stm = new MemoryStream((Byte[])res) )
{
using( StreamReader rd = new StreamReader(stm, Encoding.ASCII) )
res = LosFmt.Deserialize( rd );
}
}
}
return res;
}
case ViewStateStorageType.SessionGUID:
{
Object res = null;
String id = Request.Form[ Hidden_ViewstateID ];
if( id != null && id.Length != 0 )
{
res = Session[ id ];
if( res != null )
{
Cache.Add( id, res, null, DateTime.Now.AddMinutes(CACHE_VS_TIMEOUT),
System.Web.Caching.Cache.NoSlidingExpiration,
System.Web.Caching.CacheItemPriority.Normal, null );
Session.Remove( id );
}
else
res = Cache[ id ];
if( res != null )
using( MemoryStream stm = new MemoryStream((Byte[])res) )
{
using( StreamReader rd = new StreamReader(stm, Encoding.ASCII) )
res = LosFmt.Deserialize( rd );
}
}
return res;
}
default:
return null;
}
}
