PageStatePersister.Save Method ()
.NET Framework (current version)
Overridden by derived classes to serialize persisted state information when a Page object is unloaded from memory.
Assembly: System.Web (in System.Web.dll)
Classes that derive from the PageStatePersister class implement the Save method to persist the contents of the ViewState and ControlState properties to a persistence medium.
The following code example demonstrates how a class that derives from the PageStatePersister class implements the Save method to persist view state to a persistence medium. The StreamPageStatePersister uses an IStateFormatter object to serialize the contents of the ViewState property and ControlState property. This code example is part of a larger example provided for the PageStatePersister class.
// // Persist any ViewState and ControlState. // public override void Save() { if (ViewState != null || ControlState != null) { if (Page.Session != null) { Stream stateStream = GetSecureStream(); StreamWriter writer = new StreamWriter(stateStream); IStateFormatter formatter = this.StateFormatter; Pair statePair = new Pair(ViewState, ControlState); // Serialize the statePair object to a string. string serializedState = formatter.Serialize(statePair); writer.Write(serializedState); writer.Close(); stateStream.Close(); } else throw new InvalidOperationException("Session needed for StreamPageStatePersister."); } }
.NET Framework
Available since 2.0
Available since 2.0
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