Membership - Log Out Programatically

[Vick]

This is kind of a late response to a thread that I came across in the archive.
http://www.thescripts.com/forum/thread678632.html

I wanted the same functionality so I fired up Lutz Roeder's .NET Reflector (if you don't have this check it out) and decompiled the LoginStatus control. When you click the logout button on the LoginStatus control it calls this function:

Private Sub LogoutClicked(ByVal Source As Object, ByVal e As CommandEventArgs)
    Dim args As New LoginCancelEventArgs
    Me.OnLoggingOut(args)
    If Not args.Cancel Then
        FormsAuthentication.SignOut
        Me.Page.Response.Clear
        Me.Page.Response.StatusCode = 200
        Me.OnLoggedOut(EventArgs.Empty)
        Select Case Me.LogoutAction
            Case LogoutAction.Refresh
                If ((Me.Page.Form Is Nothing) OrElse Not String.Equals(Me.Page.Form.Method, "get", StringComparison.OrdinalIgnoreCase)) Then
                    Me.Page.Response.Redirect(Me.Page.Request.PathWithQueryString, False)
                    Return
                End If
                Me.Page.Response.Redirect(Me.Page.Request.Path, False)
                Return
            Case LogoutAction.Redirect
                Dim logoutPageUrl As String = Me.LogoutPageUrl
                If String.IsNullOrEmpty(logoutPageUrl) Then
                    logoutPageUrl = FormsAuthentication.LoginUrl
                Else
                    logoutPageUrl = MyBase.ResolveClientUrl(logoutPageUrl)
                End If
                Me.Page.Response.Redirect(logoutPageUrl, False)
                Return
            Case LogoutAction.RedirectToLoginPage
                Me.Page.Response.Redirect(FormsAuthentication.LoginUrl, False)
                Return
        End Select
    End If
End Sub

The most important line to see here is: FormsAuthentication.SignOut(). This is what logs out the user.

Hope this helps somebody.

[Plater]

The signout is only effective if you are NOT using windows authentication. (As you never give up your computer credentials officially)