Question

我已经在这个问题上工作了一段时间而且无法解决它。任何帮助将不胜感激......

使用Azure表存储（不是开发存储）我只是想从表中删除一行：

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

这会导致错误：“上下文当前没有跟踪实体。”

这种方法：

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

错误：

<?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>

如何创建服务上下文：

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没有透露任何有趣的内容。

我没有想法......

再次，非常感谢任何帮助。

干杯

Answer 1

删除_ServiceContext.MergeOption = MergeOption.NoTracking。这使DataServiceContext无法跟踪实体。

Azure存储表 - 删除项错误

1 个答案: