PageStatePersister.Load Method ()

 

Overridden by derived classes to deserialize and load persisted state information when a Page object initializes its control hierarchy.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

Public MustOverride Sub Load

Classes that derive from the PageStatePersister class implement the Load method to initialize the ViewState and ControlState properties from some persisted format.

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 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 ' Load

.NET Framework
Available since 2.0
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