Ok I’ve posted a similar issue.  But this time I’m getting an extra-postback even after I do a redirect away from the page that postbacked to.  The issue only affects Internet Explorer!

Let-me illustrate:
(Aspx Page A   {Webdialog 1    {Close Button}    ‘X Button’ }  )           

(Aspx Page B)

Note if you click the ‘X’ in the top right-hand corner.  The page works as intended.  Note my Redirect below.  I tried ‘Transfer’, Execute…. Nothing will work!

CloseButton – OnClientClick

    <asp:Button ID="btnCancelVoid" runat="server" CausesValidation="False" Text="Close" OnClientClick="closeVoidWindow();" />

        function closeVoidWindow() {

            var dialogWindow = $find('<%=wdVoidRx.ClientID%>');

            dialogWindow.set_windowState($IG.DialogWindowState.Hidden, true);

        }

    Protected Sub wdVoidRx_StateChanged(ByVal sender As Object, ByVal e As Infragistics.Web.UI.LayoutControls.DialogWindowStateChangedEventArgs) Handles wdVoidRx.StateChanged

        If e.NewState = Infragistics.Web.UI.LayoutControls.DialogWindowState.Hidden Then

            'Do the same the cancel button that is on the dispense form

            'btnCancel_Click(sender, New System.EventArgs) 'Redirect to the patient profile page 'Didn't work in IE

            'cancel the rx

            Dim fwdGUID As String = System.Guid.NewGuid().ToString().Replace("-", "")

            Dim fwd_args As New Dictionary(Of String, String)

            fwd_args.Add("MRN", hdMRN.Value.ToString)

            fwd_args.Add("PatientID", hdPatientID.Value.ToString) 'Add PatientID

            Context.Session(fwdGUID) = fwd_args

            'Server.Execute("~/Dispense/Profile.aspx?ID=" & fwdGUID.ToString, False)

            'Server.Transfer("~/Dispense/Profile.aspx?ID=" & fwdGUID.ToString, False)

            Response.Redirect("~/Dispense/Profile.aspx?ID=" & fwdGUID.ToString, False)

        End If

    End Sub