PageStatePersister.Load Method
Definition
Important
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Overridden by derived classes to deserialize and load persisted state information when a Page object initializes its control hierarchy.
public:
abstract void Load();
public abstract void Load ();
abstract member Load : unit -> unit
Public MustOverride Sub Load ()
Examples
The following code example demonstrates how a class that derives from the PageStatePersister class implements the Load method to load view state from a persistence medium. The StreamPageStatePersister
attempts to read data from a stream. It uses an IStateFormatter object to deserialize view state data and initialize the ViewState property and the ControlState property, which a page uses to initialize controls. This code example is part of a larger example provided for the PageStatePersister class.
//
// Load ViewState and ControlState.
//
public override void Load()
{
Stream stateStream = GetSecureStream();
// Read the state string, using the StateFormatter.
StreamReader reader = new StreamReader(stateStream);
IStateFormatter formatter = this.StateFormatter;
string fileContents = reader.ReadToEnd();
// Deserilize returns the Pair object that is serialized in
// the Save method.
Pair statePair = (Pair)formatter.Deserialize(fileContents);
ViewState = statePair.First;
ControlState = statePair.Second;
reader.Close();
stateStream.Close();
}
'
' Load ViewState and ControlState.
'
Public Overrides Sub Load()
Dim stateStream As Stream
stateStream = GetSecureStream()
' Read the state string, using the StateFormatter.
Dim reader As New StreamReader(stateStream)
Dim serializedStatePair As String
serializedStatePair = reader.ReadToEnd
Dim statePair As Pair
Dim formatter As IStateFormatter
formatter = Me.StateFormatter
' Deserilize returns the Pair object that is serialized in
' the Save method.
statePair = CType(formatter.Deserialize(serializedStatePair), Pair)
ViewState = statePair.First
ControlState = statePair.Second
reader.Close()
stateStream.Close()
End Sub
Remarks
Classes that derive from the PageStatePersister class implement the Load method to initialize the ViewState and ControlState properties from some persisted format.
Applies to
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