[CLOSED] Session management problem in IE8

**vadym.f** · Jun 12, 2012, 8:28 PM

Hi,

It appears that direct events are handled differently in IE8 and IE9 resulting in inconsistent session state. Please consider the code below. It works perfectly well for me in IE9. However, in IE8, the country selected is always empty until I refresh the SessionMain.aspx page using F5. What's the catch here? Please suggest a best practices approach or a workaround.

Thanks,

Vadym

SessionMain.aspx

<%@ Page Language="C#" %>

<%@ Register TagPrefix="ext" Namespace="Ext.Net" Assembly="Ext.Net" %>
<%@ Import Namespace="System.Linq" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="Ext.Net" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            string country = HttpContext.Current.Session["Country"] as string;

            if (!String.IsNullOrEmpty(country))
            {
                this.ComboCountries.SelectedItem.Text = country;
            }
        }
    }

    protected void ComboCountries_Select(object sender, DirectEventArgs e)
    {
        string country = e.ExtraParams["Country"].ToString();
        HttpContext.Current.Session["Country"] = country;
        Ext.Net.Panel activeTab = X.GetCmp<Ext.Net.Panel>("Tab1");

        activeTab.Reload();
    }
</script>
<body>
    <form id="form1" runat="server">
    <ext:ResourceManager ID="ResourceManager1" runat="server" />
    <ext:Panel runat="server" Frame="true" Height="120">
        <Items>
            <ext:ComboBox ID="ComboCountries" runat="server" Editable="false" Mode="Local" FieldLabel="Select country"
                Width="260" SelectOnFocus="true" EmptyText="Select a country...">
                <Items>
                    <ext:ListItem Text="Belgium" Value="BE" />
                    <ext:ListItem Text="Brazil" Value="BR" />
                    <ext:ListItem Text="Bulgaria" Value="BG" />
                    <ext:ListItem Text="Canada" Value="CA" />
                    <ext:ListItem Text="Chile" Value="CL" />
                    <ext:ListItem Text="Cyprus" Value="CY" />
                    <ext:ListItem Text="Finland" Value="FI" />
                    <ext:ListItem Text="France" Value="FR" />
                    <ext:ListItem Text="Germany" Value="DE" />
                    <ext:ListItem Text="Hungary" Value="HU" />
                    <ext:ListItem Text="Ireland" Value="IE" />
                    <ext:ListItem Text="Israel" Value="IL" />
                    <ext:ListItem Text="Italy" Value="IT" />
                    <ext:ListItem Text="Lithuania" Value="LT" />
                    <ext:ListItem Text="Mexico" Value="MX" />
                    <ext:ListItem Text="Netherlands" Value="NL" />
                    <ext:ListItem Text="New Zealand" Value="NZ" />
                    <ext:ListItem Text="Norway" Value="NO" />
                    <ext:ListItem Text="Pakistan" Value="PK" />
                    <ext:ListItem Text="Poland" Value="PL" />
                    <ext:ListItem Text="Romania" Value="RO" />
                    <ext:ListItem Text="Slovakia" Value="SK" />
                    <ext:ListItem Text="Slovenia" Value="SI" />
                    <ext:ListItem Text="Spain" Value="ES" />
                    <ext:ListItem Text="Sweden" Value="SE" />
                    <ext:ListItem Text="Switzerland" Value="CH" />
                    <ext:ListItem Text="United Kingdom" Value="GB" />
                </Items>
                <DirectEvents>
                    <Select OnEvent="ComboCountries_Select">
                        <EventMask ShowMask="true" />
                        <ExtraParams>
                            <ext:Parameter Name="Country" Value="item.getText()" Mode="Raw">
                            </ext:Parameter>
                        </ExtraParams>
                    </Select>
                </DirectEvents>
            </ext:ComboBox>
        </Items>
    </ext:Panel>
    <ext:TabPanel ID="TabPanel1" runat="server">
        <Items>
            <ext:Panel runat="server" ID="Tab1" Title="Tab 1">
                <AutoLoad Mode="IFrame" Url="~/SessionTab.aspx" ShowMask="true" />
            </ext:Panel>
        </Items>
    </ext:TabPanel>
    </form>
</body>
</html>

SessionTab.aspx

<%@ Page Language="C#" %>

<%@ Register TagPrefix="ext" Namespace="Ext.Net" Assembly="Ext.Net" %>
<%@ Import Namespace="System.Linq" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="Ext.Net" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            string country = HttpContext.Current.Session["Country"] as string;

            //X.Msg.Show(new MessageBoxConfig
            //{
            //    Title = "Status",
            //    Message = "Reloading tab :: " + country,
            //    Buttons = MessageBox.Button.OK,
            //    Icon = MessageBox.Icon.INFO,
            //    AnimEl = this.ClientID
            //});
            this.DisplayCountry.Text = country;
        }
    }

</script>
<body>
    <form id="form1" runat="server">
    <ext:ResourceManager ID="ResourceManager1" runat="server" />
    <ext:Panel ID="Panel1" runat="server" Frame="true">
        <Items>
            <ext:DisplayField runat="server" ID="DisplayCountry" FieldLabel="You selected"></ext:DisplayField>
        </Items>
    </ext:Panel>
    </form>
</body>
</html>

**Daniil** · Jun 12, 2012, 9:05 PM

Hi,

I think it's related to the following discussions.
http://stackoverflow.com/questions/3...ernet-explorer
http://adamyoung.net/IE-Blocking-iFrame-Cookies

You could try to apply the suggested solutions.

Another approach could be sending the parameters in the load request.

Parent Page

protected void ComboCountries_Select(object sender, DirectEventArgs e)
{
    string country = e.ExtraParams["Country"].ToString();
    Ext.Net.Panel activeTab = X.GetCmp<Ext.Net.Panel>("Tab1");

    activeTab.AutoLoad.Params.Add(new Ext.Net.Parameter("Country", country, ParameterMode.Value));
    activeTab.LoadContent();
}

Child Page

protected void Page_Load(object sender, EventArgs e)
{
    if (!X.IsAjaxRequest)
    {
        this.DisplayCountry.Text = this.Request["Country"];
    }
}

**vadym.f** · Jun 12, 2012, 9:26 PM

Thanks Daniil,

Has anyone ever had any luck with the suggested workaround to rectify the IFrame session cookie problems?

HttpContext.Current.Response.AddHeader("p3p","CP=\"IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT\"");

This doesn't seem to work for me. I would be glad to get the session variables to work instead of passing them as request parameters since it's cleaner and more transparent. Unless there's absolutely no other choice, that is.

Thanks,

Vadym

**Vladimir** · Jun 12, 2012, 9:59 PM

I have no pure IE8, tried under IETester and all works fine for me
First ensure that the issue is related with cookie. Use Fiddler to check that cookies are passed to iframe page

If problem is related with cookies then you can move session id to query string by adding the following instruction to web.config

inside section '<system.web>'

<sessionState mode="InProc" cookieless="UseUri" regenerateExpiredSessionId="true"/>

extnet section

<extnet cleanResourceUrl="false" />

**vadym.f** · Jun 13, 2012, 2:02 AM

I've inspected the header and can see the Session cookie in the Request header for both pages:

ASP.NET_SessionId=ksmjssy2oueiqd0a3qhmc3x2

What could be the other options?

Thanks,

Vadym

**Vladimir** · Jun 13, 2012, 10:21 AM

Please try to set NoCache="true" for AutoLoad to avoid possible caching. Does it help?

**vadym.f** · Jun 13, 2012, 2:24 PM

Originally Posted by Vladimir

Please try to set NoCache="true" for AutoLoad to avoid possible caching. Does it help?

That was it!! It now works correctly in IE8, IE9 and FireFox 13. Should I use that NoCache="true" setting with any TabPanel, if so, what's the syntax when adding a tab dynamically on the client side? Are there any implications in setting this option to true?

I have the following code on the client side. Setting noCache attribute to "true" doesn't seem to have any effect when a tab is reloaded on the client side.

                tab = TabPanelMain.addTab({
                    id: id,
                    title: title,
                    iconCls: iconCls,
                    tabTip: tabTip,
                    closable: true,
                    doReload: false,    // Custom attribute
                    listeners: {
                        activate: {
                            fn: function () {
                                if (this.doReload == true) {
                                    this.doReload = false;
                                    this.reload();
                                }
                            }
                        }
                    },
                    autoLoad: {
                        showMask: true,
                        url: url,
                        mode: 'iframe',
                        noCache: true,
                        maskMsg: "Loading '" + title + "'...",
                        scripts: true
                    }
                });

Thanks,

Vadym

**Daniil** · Jun 13, 2012, 7:14 PM

Originally Posted by vadym.f

Should I use that NoCache="true" setting with any TabPanel

Well, if you'd like to prevent caching, then yes.

Originally Posted by vadym.f

Are there any implications in setting this option to true?

Apart from preventing caching, there should not be any implications.

Originally Posted by vadym.f

I have the following code on the client side. Setting noCache attribute to "true" doesn't seem to have any effect when a tab is reloaded on the client side.

Should be all lower-case.

nocache : true

**vadym.f** · Jun 13, 2012, 7:38 PM

Thanks a lot for all the suggestions, setting NoCache on the server and nocache on the client to "true" got the session problem resolved without touching P3P response headers.

Vadym

**Daniil** · Jun 13, 2012, 8:44 PM

Yes, it has appeared to be just a cache issue, not a Session one.

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