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I am very new to SharePoint and Development in ASP.net. And I am stuck on probably something very small. I created a VPC with WSS 3.0, SharePoint 2007, Windows Server 2008. (I followed TechNet's instructions)

The Issue:

I am creating a web service to pull information from a SharePoint list. I am using the WSS 3.0SDK's code for ReturnListItems and when I run the code I am getting this error.

System.Net.WebException: The request failed with HTTP status 401: Unauthorized.

I am not 100% sure where to go from here. I can only assume that the problem is an authentication issue.

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1 Answer 1

Reset to default
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First, did you set the webservice credentials to defaultcredentials or are you setting them manually. 

ws.Credentials = CredentialCache.DefaultCredentials;

or

ws.Credentials = new NetworkCredential(userid, password, domain);

Second, if you are running everything on the same box, did you configure your backconnectionhostnames correctly?

http://support.microsoft.com/kb/896861

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  • I did the following "ws.UseDefaultCredentrials = true;" and I already disabled the LoopBack. Any other ideas? Thank you
    – Brogers
    Commented Apr 30, 2012 at 18:24
  • So everything is on the same box? If so you wouldn't have the NTLM double hop issue. Maybe try setting credentials to see if that changes anything.
    – Steve Lineberry
    Commented Apr 30, 2012 at 19:11
  • Yes its on the same box.
    – Brogers
    Commented Apr 30, 2012 at 19:47
  • What happened when you set the credentials instead of using the default?
    – Steve Lineberry
    Commented May 1, 2012 at 12:12
  • Maybe run fiddler and examine the results to see what is happening. Do you have anonymous turned on for the web application?
    – Steve Lineberry
    Commented May 1, 2012 at 15:17

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