ASP.NET AJAX UI

A fix to the problem

kmoore80 — Mon, 23 Oct 2006 17:35:54 GMT

I had the same problem many of you had where you were getting a 'Unknown Error' popup window while using an Atlas UpdatePanel. My problem started to occur when I tried to add '<' to a text box. I guess Atlas didn't like that character in the text box. I'm sure this applies to more controls than just a text box and to more characters than just '<'. I would recommend checking the value of your controls to make sure there are no wierd characters in them. Hope this helps.

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

kmoore80 — Mon, 23 Oct 2006 17:35:10 GMT

I had the same problem many of you had where you were getting a 'Unknown Error' popup window while using an Atlas UpdatePanel. My problem started to occur when I tried to add '<' to a text box. I guess Atlas didn't like that character in the text box. I'm sure this applies to more controls than just a text box and to more characters than '<'. I would recommend checking the value of your controls to make sure there are no wierd characters in them. Hope this helps.

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

billgatesasp — Thu, 19 Oct 2006 06:20:34 GMT

add following to your page may help

var originAlert = window.alert;
    window.alert = function(str)
    {
        if((typeof str == "string") && str=='Unknown error')
            window.location.reload();
        else
            originAlert(str);
    };

</script>

Re: ERe: Atlas Unknown Error Popup on Session Exipry - Requesting fix

renesisx — Tue, 17 Oct 2006 14:55:09 GMT

As usual, the deathly sounds of tumbleweed flow through here in the direction of Redmond.

Due to the level of support Microsoft is currently (not) offering on these forums, I can't possibly in any way recommend using ASP.NET AJAX.

I would recommend anyone thinking of trying it out to look at more mature open source alternatives, or wait until v1.0 of this product when MS have promised proper support. At least then I'd be able to force answers out of Microsoft using my MSDN subscription.

Until then, AVOID.

/rant over

ERe: Atlas Unknown Error Popup on Session Exipry - Requesting fix

billsh — Thu, 12 Oct 2006 21:33:29 GMT

I have an exceedingly simple example that gets the Unknown Error.

No response.writes. No Javascript code whatsoever. Here it is.

If anyone gets a hold of a MVPer, I'd like to share this code with them.

Click the button -- Unknown error pops up.

~Bill

' default.aspx

<%@

<%@ Page Language="VB" AutoEventWireup="true" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<%@ Register Assembly="RichTextBox" Namespace="RichTextBoxControl" TagPrefix="RTB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<title>Untitled Page</title>

</head>

<body>

<atlas:ScriptManager ID="ScriptManager1"

runat="server"

EnablePartialRendering="true"

</div>

</ErrorTemplate>

</atlas:ScriptManager>

<atlas:UpdatePanel ID="panel" runat="server" Mode="Always">

<asp:Button ID="Button1" runat="server" Text="Button" />

<asp:Label ID="Label1" runat="server" Text="Label" ForeColor="red" ></asp:Label>

<RTB:RichTextBox

ID="RichTextBox1"

runat="server" Style="width: 100px; height: 100px;"

ToolbarIsEnabled="false"

HtmlOptionIsEnabled="false"

Text = " whatever "

Enabled="true"

meta:resourcekey="txtaCurrentReportResource1" />

</ContentTemplate>

</atlas:UpdatePanel>

</form>

</references>

</components>

</page>

</script>

</body>

</html>

' default.aspx.vb

Partial Class _Default

Inherits System.Web.UI.Page

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click

Label1.Text = "Button Clicked"

End Sub

End Class

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

vikramrenganathan — Tue, 10 Oct 2006 14:40:22 GMT

The same thing happens to me. I have found that even though i set a very high value for session. The unknown error happens well before. For now I am using the update panel error template to show that some error has happened instead of the system showing the unknown error. Can anybody explain why the error happens well before the session expires. I had set the forms auth cookie expiry and session timeout to be 180 min but i get the unknown error if the page remains idle for 5 min and do something that raises a server side event on the page.

Thanks,

Vikram

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

dan p — Tue, 10 Oct 2006 09:15:21 GMT

I'm facing the same problem.

As I'm not using any other client side javascript than the one built in the atlas controls I can eliminate script specific error reasons.
I have tested the error template scenario of the script manager, but without any success.

The reason for this issue is obviously the expiring of the session and the atlas client-side code not being able to handle or not checking session timeouts. Another reason could be a missing or wrong setting in the web.config file for the atlas thing - since Atlas is relatively new and I don't know many of the web.config sections for Atlas, I would not wonder if there was a configuration snippet like

<someAtlasConfig enableFormsAuthentication="true"/>

that would do the trick.

What really annoyes me is that despite many people are facing this issue, there is no useful solution.

Does anybody know a guy from the programmers team? This is the moment to let him know!

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

Brian62 — Tue, 10 Oct 2006 03:56:52 GMT

I've discovered since my last post that the "Unknown error" only occurrs when the new session trys to redirect to a different page. In my app when the session starts it checks certain conditions and may redirect. If there is no redirect it renews the session without error.

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

Brian62 — Mon, 09 Oct 2006 22:43:27 GMT

I'm also getting the same 'Unknown error' alert when the session expires. Without Atlas on the page there is no problem. I can trap errors and modify the ErrorMessages of other page errors with with the 'OnPageError' event of the script manager but it won't trap the 'Unknown error'. I assume this is because the server code is not executed as Atlas is not able to deal with the expired session. My page continues after the alert and renews the session but I would like to avoid this error or at least be able to modify it.

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

renesisx — Thu, 05 Oct 2006 11:33:57 GMT

I'm guessing you guys are using ASP.NET Forms Auth - and the login cookie is expiring.

From what I can tell, ASP.NET Ajax throws an "Unknown Error" when it makes a XmlHttp call and gets a response which isn't what it was expecting.

In the case of a session expiry, instead of the page fragment it was expecting it suddenly gets back a "You need to login" page, or a 500 error, or a 404.

It doesn't know what to do, and dies with an "Unknown Error".

I'm going to try out that ErrorTemplate example pasted in one of the replies above and see if that does it for me.

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

sarfarajsayyad — Thu, 05 Oct 2006 10:06:54 GMT

still face same problem,

Regards,

Sarfaraj Sayyad

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

mayur_hirpara — Tue, 12 Sep 2006 13:52:36 GMT

Hi,
I have found this problem several times. finally I was able to corner it in my case.
I was using several UpdatePanels on my page and have few javascript functions within SCript tag in HEAD section of page.
It is important to note that whnever javascript function contains "postfix increment operator" i.e ++ or "postfix decrement operator" i.e. --, it will throw "Unknown Error".

Similarly whenever javascript function contains "logical AND operator " i.e. && "logical OR operator" i.e. ||, it throws the "Unknown Error".
However, if these functions are inside "BODY" tag then it works just great. Or if they are moved to a separate JS file and then include it in HEAD tag, it all works fine.

Hope this helps.
Mayur

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

Amitindia — Tue, 12 Sep 2006 13:46:03 GMT

Remove line Response.AppendHeader("Refresh", headerval); & try again with correct session timeout methods.

remove any response.write statements & replace them with this.page.clientscript.registerclientscriptblock();

we have no problems with session timeout.Updatepanel works even if session is expired

Amit Lohogaonkar

mcp,mcad

lohogaonkaramit@yahoo.com

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

pstatho — Tue, 12 Sep 2006 12:35:59 GMT

I had this issue as well. I did find an acceptable work arround. Create and <ErrorTemplate> section within the ScriptManager tag. This will eliminate the JavaScript popup alert. Then you can have a firendly erro message asking the user to relogin and provide a link to the login page. Something like this:

<atlas:ScriptManager ID="ScriptManager1" EnablePartialRendering="true" OnPageError="Page_ErrorHandler" runat="server">
<ErrorTemplate>
<div class="ErrorDialog">
<div>
<asp:Image ID="Image1" ImageUrl="~/images/error.gif" ImageAlign="AbsMiddle" runat="server" />
<span style="font-size: 16pt; font-weight: bolder;">Server Error</span>
</div>
<div>
You encountered an unexpected error. The error has been logged and will be investigated.
</div>
<div>
<a href="login.aspx">click here to re-login.</a>
</div>
</div>
</ErrorTemplate>
</atlas:ScriptManager>

See ErrorTemplate doc for more info: http://atlas.asp.net/docs/Server/Microsoft.Web.UI/ScriptManager/P_ErrorTemplate.aspx

Hope this helps,
Perry

Re: Atlas Unknown Error Popup on Session Exipry - Requesting fix

TorgerJW — Fri, 08 Sep 2006 20:59:10 GMT

Bump.

I am also having this problem