Load-On-Demand: 'Authentication Failed'

[Brad]

I have a RadComboBox following the Load-on-demand PageMethod example. http://demos.telerik.com/aspnet-ajax/combobox/examples/populatingwithdata/autocompletesql/defaultcs.aspx

I am getting an alert with the message 'Authentication Failed' when I click the drop down. The RadComboBox happens to be in a RadGrid and I tried calling the same method on the RadGrid DataItemBound event and the method completed successfully (removing any question of database connectivity issues).

<telerik:RadComboBox ID="uxService" runat="server" DropDownWidth="175px" EmptyMessage="Service:" Height="150px" Width="100px" EnableLoadOnDemand="true" ShowMoreResultsBox="true" EnableVirtualScrolling="true" OnClientBlur="dropDownBlur">
   <WebServiceSettings Method="GetServices" Path="TimeCard.ascx" />
</telerik:RadComboBox>

[WebMethod]
public static RadComboBoxData GetServices(RadComboBoxContext context)
{
    DataView data = Website.BlueSkyFactory.Time.GetServices(context.Text + "%");
    RadComboBoxData serviceData = new RadComboBoxData();
    int itemOffset = context.NumberOfItems;
    int endOffset = Math.Min(itemOffset + ItemsPerRequest, data.Count);
    serviceData.EndOfItems = endOffset == data.Count;
    List<RadComboBoxItemData> result = new List<RadComboBoxItemData>(endOffset - itemOffset);
    RadComboBoxItemData itemData;
    for (int i = itemOffset; i < endOffset; i++)
    {
        itemData = new RadComboBoxItemData();
        itemData.Text = data[i]["FriendlyName"].ToString();
        itemData.Value = data[i]["ServiceId"].ToString();
        result.Add(itemData);
    }
    serviceData.Message = GetStatusMessage(endOffset, data.Count);
    serviceData.Items = result.ToArray();
    return serviceData;
}

Please advise.

[Simon]

Hello Brad,

Please put a debugger breakpoint in the GetServices method and step through all of the lines to see whether an exception is thrown.

Greetings,
Simon
the Telerik team

[Brad]

I did this and as I stated, the initial run through it works. When I click the dropdown, however, the breakpoint is not hit. I have worked around the issue for now by using the ItemsRequested event, but I think I'd rather avoid the post-back.

[Simon]

Hi Brad,

Searching in Google for 'authentication failed page method' yields many results, one of which suggests enabling of the Session in the WebMethod attribute, e.g.

[WebMethod(Session=true)]

Does this help?

All the best,
Simon
the Telerik team

[Jason Marshall]

I have same issue. I am using Forms Auth, and my session timeout is set at 120 minutes. However after 15 minutes of inactivity, the AJAX load-on-demain radcombobox gives me a messagebox: 'Authentication Failed' when you type something in it.

I see how you can catch this error, but i want to AVOID it altogether.
I tried to doing a session keep-alive to fire every 5 minutes, but this still occurs. Please help! How can I get the load-on-demand to respect session timeout? 
thanks
Jason

[Simon]

Hello Jason Marshall,

Can you reproduce this each time in a new and simple project? Additionally, what is the type of Load On Demand you are using - server-side or WebService?

All the best,
Simon
the Telerik team

[Eric]

I was able to fix this problem by adding the   [ScriptService]  tag to the class.

[Dan]

I am getting the same "Authentication failed." error while using the control via a webservice.  The webservice class is designated with [ScriptService] and the method has the Session=true attribute set as well.  It is a fairly complicated session scenario, and I think that an expired session is the source of that error, but I was wondering how one might go about catching that error and redirecting the user.  Thanks for your help.

[Simon]

Hello Daniel,

Do you have authentication and authorization enabled in your web site? If yes, please verify that you have granted proper access to the web service.

All the best,
Simon
the Telerik team

[Dan]

Yes, I have the authorization and authentication set up correctly.  I should have said that I only get this issue intermittently, so that is why I wanted to know how to catch that error.

[Simon]

Hello Daniel,

The most straightforward way to troubleshoot such issues is to inspect the IIS logs for more details on the exception and the error code.

Kind regards,
Simon
the Telerik team

[Nazme]

Hi Simon,

I have the same issue which I get intermittently. I have set authentication and authorization in web.config. Still I get an alert with “authentication failed”. I could not solve this problem for more than 3 weeks. Could you please help me? Thanks.

Nazme

[Nencho]

Hello Nazme,

I noticed that you had submitted a support ticket regarding the same issue. Therefore, I would suggest you to continue the conversation in the other ticket, in order to avoid duplication.

Regards,
Nencho
Telerik