Namespace:
System.Web.UI
Assembly:
System.Web (in System.Web.dll)
Visual Basic (Declaration)
Protected ReadOnly Property StateFormatter As IStateFormatter
Dim value As IStateFormatter
value = Me.StateFormatter
protected IStateFormatter StateFormatter { get; }
protected:
property IStateFormatter^ StateFormatter {
IStateFormatter^ get ();
}
protected function get StateFormatter () : IStateFormatter
You can override the StateFormatter property to provide your own view state formatter.
The following code example demonstrates how a class that derives from the PageStatePersister class accesses the StateFormatter property to retrieve an ObjectStateFormatter object, which is the default implementation of the IStateFormatter interface, to serialize view state and control state to a stream. This code example is part of a larger example provided for the PageStatePersister class.
'
' Persist any ViewState and ControlState.
'
Public Overrides Sub Save()
If Not (ViewState Is Nothing) OrElse Not (ControlState Is Nothing) Then
If Not (Page.Session Is Nothing) Then
Dim stateStream As Stream
stateStream = GetSecureStream()
' Write a state string, using the StateFormatter.
Dim writer As New StreamWriter(stateStream)
Dim formatter As IStateFormatter
formatter = Me.StateFormatter
Dim statePair As New Pair(ViewState, ControlState)
Dim serializedState As String
serializedState = formatter.Serialize(statePair)
writer.Write(serializedState)
writer.Close()
stateStream.Close()
Else
Throw New InvalidOperationException("Session needed for StreamPageStatePersister.")
End If
End If
End Sub 'Save
//
// 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.");
}
}
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0
Reference