SessionStateUtility.RemoveHttpSessionStateFromContext(HttpContext) 方法

定義

命名空間:

System.Web.SessionState

組件:

System.Web.dll

從指定的內容中移除工作階段資料。

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)

參數

context

HttpContext

供移除工作階段資料的 HttpContext。

範例

下列程式碼範例顯示自訂會話狀態模組中事件的處理常式 ReleaseRequestState 。 事件處理常式會從目前的 HttpContext 移除會話資料。 此程式碼範例是提供給 類別之較大範例的 SessionStateUtility 一部分。

//
// 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

備註

方法 RemoveHttpSessionStateFromContext 會從指定的 HttpContext 清除會話資料。 會話狀態模組會在 事件的處理常式 ReleaseRequestState 中呼叫 RemoveHttpSessionStateFromContext 方法。