PageStatePersister.Save Méthode

public:
 abstract void Save();

public abstract void Save ();

abstract member Save : unit -> unit

Public MustOverride Sub Save ()

Exemples

L’exemple de code suivant montre comment une classe dérivée de la classe implémente la PageStatePersister méthode pour conserver l’état Save d’affichage sur un support de persistance. utilise StreamPageStatePersister un IStateFormatter objet pour sérialiser le contenu de la propriété et ControlState de la ViewState propriété. Cet exemple de code fait partie d’un exemple plus grand fourni pour la PageStatePersister classe .

//
// 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.");
        }
    }
}

'
' 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

Remarques

Les classes qui dérivent de la PageStatePersister classe implémentent la Save méthode pour conserver le contenu des ViewState propriétés et ControlState dans un support de persistance.

S’applique à