BG_JOB_STATE_ERROR - AutoUpdater

["Anand"]

Hi,

I downloaded the sample autoupdater application from 
http://msdn.microsoft.com/msdnmag/issues/03/02/BITS/default.aspx

I am running WINDOWS XP SP1 with BITS service successfully running under 
local system account.

When I run this application, it throws me BG_JOB_STATE_ERROR when I check 
the state of the job. the statement "               job.GetState(out state);" 
 returns BG_JOB_STATE_ERROR ALWAYS. I am not sure if job is getting added or 
not. 

I have kept the files under                                 localhost/updates">http://localhost/updates with ONLY anonymous 
access on. 

Can somebody help me out.

Here is the code snippit


   // Do the file download and polling logic
   static void HandleBits(Object o){
      IBackgroundCopyManager bcm = null;
      IBackgroundCopyJob job=null;
      try{
         // Create BITS object
         bcm = (IBackgroundCopyManager)new BackgroundCopyManager();         
         Guid jobID=Guid.Empty;         
         if(xml.BitsJob != Guid.Empty){ // Do we already have a job in place?
            jobID = xml.BitsJob;
            BG_JOB_STATE state;
            try{
               bcm.GetJob(ref jobID, out job); // Get the BITS job object
               job.GetState(out state);        // check its state
               switch(state){
               case BG_JOB_STATE.BG_JOB_STATE_ERROR: // If it is an error, 
re-poll
                  job.Complete();
                  xml.BitsJob = Guid.Empty;
                  Marshal.ReleaseComObject(job);
                  job = null;
                  break;
               case BG_JOB_STATE.BG_JOB_STATE_TRANSFERRED: // If we got the 
job
                  job.Complete();                          // then complete it
                  xml.BitsJob = Guid.Empty;
                  return;
               default:
                  return;
               }
            }catch(COMException e){               
               if(e.ErrorCode == unchecked((Int32)0x80200001)){ // Job 
doesn't exist
                  xml.BitsJob = Guid.Empty;
               }else
                  throw; // Some other error we didn't expect
            }catch(UnauthorizedAccessException){ 
               return; // We don't have access to the current job... no biggie
            }                                  
         }                  
         
         // Create a bits job to download the next expected update
         bcm.CreateJob("Application Update", 
            BG_JOB_TYPE.BG_JOB_TYPE_DOWNLOAD, out jobID, out job);
         job.SetDescription("Updating application at "+baseDir);
         String resource;
         if(xml.PatchUrl[xml.PatchUrl.Length-1] == '/'){
            resource = xml.PatchUrl+patchName;
         }else{
            resource = 
               String.Format("{0}/{1}", xml.PatchUrl, patchName);
         }
         // Add the file to the job
         job.AddFile(resource, baseDir+patchName);
         job.Resume(); // start the job in action
         xml.BitsJob = jobID; // save the Job Guid
      }finally{         
         // cleanup
         if(job != null) 
            Marshal.ReleaseComObject(job);
         if(bcm != null)
            Marshal.ReleaseComObject(bcm);         
      }      
   }