PageStatePersister.Save Método

public:
 abstract void Save();

public abstract void Save();

abstract member Save : unit -> unit

Public MustOverride Sub Save ()

Exemplos

O exemplo de código seguinte demonstra como uma classe que deriva da PageStatePersister classe implementa o Save método para persistir o estado da vista num meio de persistência. Utiliza StreamPageStatePersister um IStateFormatter objeto para serializar o conteúdo da ViewState propriedade e ControlState da propriedade. Este exemplo de código faz parte de um exemplo maior fornecido para a 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

Observações

As classes que derivam da PageStatePersister classe implementam o Save método para persistir o conteúdo das ViewState propriedades e ControlState num meio de persistência.