SyncTracer in ADO.NET Data Services on a mobile device

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  Hi Mick,
  
  I can't tell you about tracing sync on the mobile device, but the "magic" mostly lies in the changetracking support of SQL Server Compact. Have a look at your local device database and the additional tables and columns it contains when sync is initialized. These are used by SyncServices to retrieve which data has been inserted/updated/deleted since the last sync.
  
  I believe SyncServices and the whole SyncFramework are great stuff that will really push mobile app development. But for now I recommend you really thoroughly test if it fits your needs. Especially in terms of performance and stuff like identity management we are all really looking forward to the next release. At the moment we had to try several hacks because our customers simply did not accept the performance. There is no definite answer yet when the next version will be released (and if all above probs are solved).
  
  Andreas

  Tuesday, March 24, 2009 12:55 PM
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  If you were to create these tables yourself.  How would you do it?
  

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  Mick Lang

  Tuesday, March 24, 2009 12:56 PM
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  This is currently an undoc-ed feature, but tracing does support on sync service for device with the current release.
  
  On WinCE, the filename for the trace configuration is “trace.config.txt” and this file should be in the same directory as the exe.  Here is a working example:

   

  <?xml version="1.0" encoding="utf-8" ?>

  <configuration>

     <traceSettings>

       <add key ="FileLocation" value="test.txt"/>

       <add key ="LogLevel" value="4"/>

     </traceSettings>

  </configuration>
  
  
  thanks
  Yunwen

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  This posting is provided "AS IS" with no warranties, and confers no rights.

  • Proposed as answer by Yiming L Wednesday, April 1, 2009 3:44 AM

  Wednesday, March 25, 2009 10:29 AM

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  Thanks Yunwen, I tried changing the contents as you've instructed, however, it still doesn't appear to work. 
  
  I believe it simply doesn't work, there is code there that looks like it should produce a sync trace, but there's a bug that ensures it never does.  If there's anyone at Microsoft who can change the code, I believe the problem lies in the path to the file being passed to File.Exists as a Uri
  
  e.g 'file:///program files/myapp/mylog.log'
  
  ...for whatever reason when you pass a file in this format to File.Exists(..) its coming back with false.

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  Mick Lang

  Tuesday, March 31, 2009 5:41 AM
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  Thanks Yunwen, I tried changing the contents as you've instructed, however, it still doesn't appear to work. 
  
  I believe it simply doesn't work, there is code there that looks like it should produce a sync trace, but there's a bug that ensures it never does.  If there's anyone at Microsoft who can change the code, I believe the problem lies in the path to the file being passed to File.Exists as a Uri
  
  e.g 'file:///program files/myapp/mylog.log'
  
  ...for whatever reason when you pass a file in this format to File.Exists(..) its coming back with false.

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  Mick Lang

   

  HI Mick,
  
  I have make a try follow Yunwen's mention, it can be work under my device.
  
  And there are 2 extra points that you need to take care:

   

  1.      Make sure file "trace.config.txt" has put in your application folder on device. You may create a file named "trace.config.txt" and add to your VS solution, the VS will automatic generate this file within your app folder when you deploy App.

  2.      If you are not specify a log file path, the log will by default generate in ROOT path under device. Please take a look.

   

  Share out my trace.config.txt:

   

  <?xml version="1.0" encoding="utf-8" ?>

  <configuration>

  <traceSettings>

  <add key ="FileLocation" value="Trace_OCS.txt"/>

  <add key ="LogLevel" value="1"/>

  </traceSettings>

  </configuration>

   

  If still not work, please tell me your build version of Sync Service for ado.net, thanks.

   

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  Joey Liang
  Your potential our passion This posting is provided "AS IS" with no warranties, and confers no rights.

  • Marked as answer by Yunwen BaiModerator Thursday, April 2, 2009 7:58 PM

  Wednesday, April 1, 2009 3:59 AM