Question

I’ve been working on this issue for a while now and just can’t get around it. Any help would be much appreciated…

Using Azure Table Storage (not development storage) I’m simply trying to delete a row from a table:

Public Sub DeleteByItemId(pairItemId As String)
    Dim item = (From c In _ServiceContext.UserTable Where c.Id = pairItemId Select c).Single()
    _ServiceContext.DeleteObject(item)
    _ServiceContext.SaveChanges()
End Sub

This causes an error: “The context is not currently tracking the entity.”

And this approach:

Public Sub DeleteByItemId(itemId As String)
    Dim item = New <object type>
    item.PartitionKey = "sandbox"
    item.RowKey = itemId
    _ServiceContext.AttachTo(<table name>, item, "*")
    _ServiceContext.DeleteObject(item)
    _ServiceContext.SaveChanges()
End Sub

Errors with this:

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
  <code>InvalidInput</code>
  <message xml:lang="en-US">One of the request inputs is not valid.
RequestId:e37b0824-3336-4089-b6ac-2824438618f6
Time:2012-08-07T01:37:28.2741813Z</message>
</error>

How the service context gets created:

Public Sub New()
     Dim storageAccount = CloudStorageAccount.FromConfigurationSetting("DataConnectionString")
    _ServiceContext = New OroosoUserPairedAccountDataServiceContext(storageAccount.TableEndpoint.ToString(), storageAccount.Credentials)
    _ServiceContext.IgnoreResourceNotFoundException = True
    _ServiceContext.MergeOption = MergeOption.NoTracking

    ' Create the tables
    ' In this case, just a single table.  
    storageAccount.CreateCloudTableClient().CreateTableIfNotExist(<table name>)
End Sub

Fiddler hasn’t revealed anything interesting.

I’m out of ideas…

Again, any help would be much appreciated.

Cheers

Answer 1

Remove _ServiceContext.MergeOption = MergeOption.NoTracking. This is keeping the DataServiceContext from tracking the entity.