Hello,
I'm trying to implement Peter Bromberg's Session Timeout Control:
http://www.eggheadcafe.com/articles/20051228.asp
in ASP.NET 2.0 and am finding that the code never fires. I'm not sure what
I'm doing wrong here. Yes, it would be easy enough to place some of that
code in a class, or test for a particular Session variable but it would be
nice to have a control to drop on a web form and have it just work. Can
anyone tell me what I might be missing. Sorry, I'm still pretty new to
ASP.NET:

Imports System
Imports System.ComponentModel
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI

<DefaultProperty("Text"), _
           ToolboxData("<{0}:SessionTimeoutControl
runat=server></{0}:SessionTimeoutControl>")> _
Partial Class UserControls_SessionTimeOutControl
  Inherits System.Web.UI.UserControl

  ' reference for this control:
  ' http://www.eggheadcafe.com/articles/20051228.asp

#Region "Private member variables"
  Private mRedirectUrl As String
#End Region

#Region "Public Properties"
  <Bindable(True), Category("Appearance"), DefaultValue("")> _
  Public Property RedirectUrl() As String
     Get
        Return mRedirectUrl
     End Get
     Set(ByVal value As String)
        mRedirectUrl = value
     End Set
  End Property

  Public Overrides Property Visible() As Boolean
     Get
        Return False
     End Get
     Set(ByVal value As Boolean)
        '
     End Set
  End Property

  Public Overrides Property EnableViewState() As Boolean
     Get
        Return False
     End Get
     Set(ByVal value As Boolean)
        'MyBase.EnableViewState = value
     End Set
  End Property
#End Region

#Region "Protected Members"
  Protected Overrides Sub Render(ByVal writer As
System.Web.UI.HtmlTextWriter)
     If HttpContext.Current Is Nothing Then
        writer.Write("[ *** SessionTimeout: " + Me.ID + " *** ]")
     End If
     MyBase.Render(writer)
  End Sub

  Protected Overrides Sub OnPreRender(ByVal e As System.EventArgs)
     MyBase.OnPreRender(e)
     If Me.mRedirectUrl Is Nothing Then
        Throw New InvalidOperationException("RedirectUrl Property Not
Set.")
     End If
     If Context.Session IsNot Nothing Then
        Dim sCookieHeader As String = Page.Request.Headers("Cookie")
        If (sCookieHeader IsNot Nothing) And
(sCookieHeader.IndexOf("ASP.NET_SessionId") >= 0) Then
           If Page.Request.IsAuthenticated Then
              FormsAuthentication.SignOut()
           End If
           Page.Response.Redirect(Me.mRedirectUrl)
        End If
     End If
  End Sub
#End Region
End Class

SAL