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Error in web service codes when accessing a list

Posted By:      Posted Date: October 01, 2010    Points: 0   Category :SharePoint

Hi all

I've been getting error when i programatically try to access a list. below is my code from a web service:

public IDEASBase(SPWeb web)
      this._spWebPassedByParameter = true;
      this._web = web;
      SPList list = this._web.Lists[this._listName.ToString()];
      this._item = list.Items.Add();

According to the stack trace, the error occurs at SPList list = this._web.Lists[this._listName.ToString()];

Stack trace:

System.Threading.ThreadAbortException: Thread was being aborted.
  at System.Threading.Thread.AbortInternal()
  at System.Threading.Thread.Abort(Object stateInfo)
  at System.Web.HttpResponse.End()
  at Microsoft.SharePoint.Utilities.SPUtilityInternal.SendResponse(HttpResponse response, Int32 code, String strBody)
  at Microsoft.SharePoint.Utilities.SPUtilityInternal.Send401(HttpResponse response)
  at Microsoft.SharePoint.Utilities.SPUtility.HandleAccessDenied(Exception ex)
  at Microsoft.SharePoint.SPGlobal.HandleUnauthorizedAccessException(UnauthorizedAccessException ex)
  at Microsoft.SharePoint.Library.SPRequest.GetListsWithCallback(String bstrUrl, Guid foreignWebId, String bstrListInternalName, Int32 dwBaseType, Int32 dwBaseTypeAlt, Int32 dwServerTemplate, UInt32 dwGetListFlags, UInt32 dwListFilterFlags, Boolean bPrefetchMetaData, Boolean bSecurityTrimmed, Boolean bG

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