TableServcieContext.SaveChanges() fails?

Question

When I call this method after adding an object I get a DataServiceRequestException:

 An error occurred while processing this request., stack:    at System.Data.Services.Client.DataServiceContext.SaveResult.HandleBatchResponse()
   at System.Data.Services.Client.DataServiceContext.SaveResult.EndRequest()
   at System.Data.Services.Client.DataServiceContext.SaveChanges(SaveChangesOptions options)
   at WorkerRole1.DeviceServiceContext.AddDevice(Device d)

The inner exception reads:
<error xmlns=""http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"">
  <code>NotImplemented</code>
  <message xml:lang=""en-US"">The requested operation is not implemented on the specified resource.
RequestId:11d4ef63-0ba2-4601-9e91-1667231149ac
Time:2011-09-14T16:07:29.5797905Z</message>
</error>",73af82c7a5d7433886304225e1350bce,WorkerRole1,WorkerRole1_IN_0,2696,2780,9/14/2011 4:10:07 PM,

The table I'm writing to exists. My storage account seems fine.

Any idea what causes the Not Implemented error?

Answer 1

Turns out the SaveChanges() method was unhappy about one of the poperties on my entity object. Fixed and working but a more precise exception method would have been nice.

Answer 2

Hi onnoweb,

I'm glad to hear that you resolve this issue.

If you have any difficulty in future programming, we welcome you to post in forums again.

 

Best Regards,

Ming Xu.

---

Please mark the replies as answers if they help or unmark if not.
If you have any feedback about my replies, please contact [e-mail].
Microsoft One Code Framework

Answer 3

I also encountered this exception. In hopes of helping anyone else that faces this issue in the future, I was using a property of type float within my class derived from TableServiceEntity. This is not a supported type and I was able to fix this by changing it to type double.

Here is a link to the supported property types: 
http://msdn.microsoft.com/en-us/library/windowsazure/dd179338.aspx

Answer 4

Yes! The exceptions in Azure generally are horrible. It just took me 30 minutes to figure out that I inadvertently used a decimal instead of a double in my class.

Answer 5

I got this error as well, trying to execute this code:

return View(CloudStorageAccount.Parse(connstring)
        .CreateCloudTableClient().GetDataServiceContext().CreateQuery<LogMessage >( "log")
        .OrderByDescending(l => l.Time)
        .Take(20));

It turned out the line '.OrderByDescending(l => l.Time)' was causing the error...