SessionStateUtility.RemoveHttpSessionStateFromContext(HttpContext) Metod

Definition

Namnområde:
System.Web.SessionState
Sammansättning:
System.Web.dll

Tar bort sessionsdata från den angivna kontexten.

public:
 static void RemoveHttpSessionStateFromContext(System::Web::HttpContext ^ context);
public static void RemoveHttpSessionStateFromContext(System.Web.HttpContext context);
static member RemoveHttpSessionStateFromContext : System.Web.HttpContext -> unit
Public Shared Sub RemoveHttpSessionStateFromContext (context As HttpContext)

Parametrar

context
HttpContext

Varifrån HttpContext du vill ta bort sessionsdata.

Exempel

I följande kodexempel visas hanteraren för händelsen i en modul för ReleaseRequestState anpassat sessionstillstånd. Händelsehanteraren tar bort sessionsdata från den aktuella HttpContext. Det här kodexemplet är en del av ett större exempel för SessionStateUtility klassen.

//
// Event handler for HttpApplication.ReleaseRequestState
//

private void OnReleaseRequestState(object source, EventArgs args)
{
    HttpApplication app = (HttpApplication)source;
    HttpContext context = app.Context;
    string sessionID;

    // Read the session state from the context
    HttpSessionStateContainer stateProvider =
      (HttpSessionStateContainer)(SessionStateUtility.GetHttpSessionStateFromContext(context));

    // If Session.Abandon() was called, remove the session data from the local Hashtable
    // and execute the Session_OnEnd event from the Global.asax file.
    if (stateProvider.IsAbandoned)
    {
        try
        {
            pHashtableLock.AcquireWriterLock(Int32.MaxValue);

            sessionID = pSessionIDManager.GetSessionID(context);
            pSessionItems.Remove(sessionID);
        }
        finally
        {
            pHashtableLock.ReleaseWriterLock();
        }

        SessionStateUtility.RaiseSessionEnd(stateProvider, this, EventArgs.Empty);
    }

    SessionStateUtility.RemoveHttpSessionStateFromContext(context);
}

'
' Event handler for HttpApplication.ReleaseRequestState
'
Private Sub OnReleaseRequestState(ByVal [source] As Object, ByVal args As EventArgs)
    Dim app As HttpApplication = CType([source], HttpApplication)
    Dim context As HttpContext = app.Context
    Dim sessionID As String

    ' Read the session state from the context
    Dim stateProvider As HttpSessionStateContainer = _
       CType(SessionStateUtility.GetHttpSessionStateFromContext(context), HttpSessionStateContainer)

    ' If Session.Abandon() was called, remove the session data from the local Hashtable
    ' and execute the Session_OnEnd event from the Global.asax file.
    If stateProvider.IsAbandoned Then
        Try
            pHashtableLock.AcquireWriterLock(Int32.MaxValue)

            sessionID = pSessionIDManager.GetSessionID(context)
            pSessionItems.Remove(sessionID)
        Finally
            pHashtableLock.ReleaseWriterLock()
        End Try

        SessionStateUtility.RaiseSessionEnd(stateProvider, Me, EventArgs.Empty)
    End If

  SessionStateUtility.RemoveHttpSessionStateFromContext(context)
End Sub

Kommentarer

Metoden RemoveHttpSessionStateFromContext rensar sessionsdata från den angivna HttpContext. En sessionstillståndsmodul anropar RemoveHttpSessionStateFromContext metoden i hanteraren för ReleaseRequestState händelsen.

Gäller för