PageStatePersister.Save Metode

Definisi

Ruang nama:

System.Web.UI

Rakitan:

System.Web.dll

Ditimpa oleh kelas turunan untuk menserialisasikan informasi status persisten saat Page objek dibongkar dari memori.

public:
 abstract void Save();

public abstract void Save();

abstract member Save : unit -> unit

Public MustOverride Sub Save ()

Contoh

Contoh kode berikut menunjukkan bagaimana kelas yang berasal dari PageStatePersister kelas mengimplementasikan Save metode untuk mempertahankan status tampilan ke media persistensi. StreamPageStatePersister menggunakan IStateFormatter objek untuk menserialisasikan ViewState konten properti dan ControlState properti. Contoh kode ini adalah bagian dari contoh yang lebih besar yang disediakan untuk PageStatePersister kelas .

//
// 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

Keterangan

Kelas yang berasal dari PageStatePersister kelas menerapkan Save metode untuk mempertahankan konten ViewState properti dan ControlState ke media persistensi.