Query failed: error code: '499': 'Token Required'

[ShaningYu]

Scenario:  Executing a Silverlight application. In this application, 10 map layers are defined in the config.xml.  I run this application well on last Friday before I left the office.  But in the earlier Monday morning, when I run it again, the message:  Query failed: error code: '499': 'Token Required', displays.  I checked and found it was due to the access to the 10 map layers defined in the config.xml.  In my .xml, there is no setup for security (e.g. userID and password).  I can't figure out why this happens suddenly.  Appreciate if you can provide your advisory.

[DominiqueBroux]

Error '499' means that your service is secured and you need a token to access it.

Can you still access to your services through a browser?

[ShaningYu]

You are right.  If I open the URL directly, I get a page to ask me to logon.  After I logon, I can view the map layers. But I still get the 499 error if I run the program.  How can it be be fixed?  Thanks.

[DominiqueBroux · Accepted solution]

The easiest way is to activate the IdentityManager with the SignInDialog provided in the toolkit. Put the following line at application startup:

ESRI.ArcGIS.Client.IdentityManager.Current.ChallengeMethod = ESRI.ArcGIS.Client.Toolkit.SignInDialog.DoSignIn;

In this case the user will get challenged when an authorization error is intercepted by the Identity manager.

[ShaningYu]

Problem solved - I reset the the map layers access properties as public.  Thanks for your hint.