LINQ to SQL没有更新db的问题

我已阅读这里的帖子，找不到任何尤里卡答案，所以这里是我的。 Linq到SQl不会将更改传播回数据库。LINQ to SQL没有更新db的问题

这是我的代码。有什么突出的东西吗？对dc.GetChangeSet的调用显示0更改。我错过了什么？我可以看到来自“设置”的新值被设置为cs对象属性。 SettingID是我表中的主键，并在dbml中显示为PK，所以这不是问题。

Public Shared Function Update(ByVal setting As ClarifireSetup) As Boolean 

    Dim cs As ClarifireSetup 

    Try 
     Using dc As New AdminClarifireSetupDataContext(TripleDESSecurity.Decrypt(SharedData.PortalCnx)) 
      cs = (From d In dc.AdminClarifireSetups 
        Where d.SettingID = setting.SettingID 
        Select New ClarifireSetup With { 
        .SettingID = d.SettingID, 
        .SettingKey = d.SettingKey, 
        .SettingValue = d.SettingValue, 
        .FriendlyName = d.FriendlyName, 
        .DisplayOrder = d.DisplayOrder 
       }).FirstOrDefault() 

      If cs IsNot Nothing Then 
       cs.SettingID = setting.SettingID 
       cs.SettingKey = setting.SettingKey 
       cs.SettingValue = setting.SettingValue 
       cs.FriendlyName = setting.FriendlyName 
       cs.DisplayOrder = setting.DisplayOrder 
       dc.GetChangeSet() 
       dc.SubmitChanges() 
      End If 
     End Using 

     Return True 

    Catch ex As Exception 
     Throw 
    Finally 
     If Not cs Is Nothing Then 
      cs.Dispose() 
      cs = Nothing 
     End If 
    End Try 

End Function

编辑：改变了我的代码，这样，InsertOnSubmit显示1插入，在dc.SubmitChanges它的错误，由于cconflict。它试图插入，不更新......

Public Shared Function Update(ByVal setting As ClarifireSetup) As Boolean 

    Dim cs As AdminClarifireSetup 

    Try 
     Using dc As New AdminClarifireSetupDataContext(TripleDESSecurity.Decrypt(SharedData.PortalCnx)) 
      'cs = (From d In dc.AdminClarifireSetups 
      '  Where d.SettingID = setting.SettingID 
      '  Select New AdminClarifireSetup With { 
      '  .SettingID = d.SettingID, 
      '  .SettingKey = d.SettingKey, 
      '  .SettingValue = d.SettingValue, 
      '  .FriendlyName = d.FriendlyName, 
      '  .DisplayOrder = d.DisplayOrder 
      ' }).FirstOrDefault() 
      cs = New AdminClarifireSetup 

      If cs IsNot Nothing Then 
       cs.SettingID = setting.SettingID 
       cs.SettingKey = setting.SettingKey 
       cs.SettingValue = setting.SettingValue 
       cs.FriendlyName = setting.FriendlyName 
       cs.DisplayOrder = setting.DisplayOrder 
       dc.SubmitChanges() 
      End If 
     End Using 

     Return True 

    Catch ex As Exception 
     Throw 
    Finally 
     If Not cs Is Nothing Then 
      cs = Nothing 
     End If 
    End Try 

End Function

来源

2011-08-31 CD Smith

有时只是重新创建DBML可以帮助 – Pleun

不，从头重新创建dbml没有帮助。仍然在GetChangeSet中显示0项 –

尝试删除自定义类代码，只是选择d。

Dim cs as AdminClarifireSetup ' This looks like the actual object type 

Try 
     Using dc As New AdminClarifireSetupDataContext(TripleDESSecurity.Decrypt(SharedData.PortalCnx)) 
      cs = (From d In dc.AdminClarifireSetups 
        Where d.SettingID = setting.SettingID 
        Select d).Single() 

      If cs IsNot Nothing Then 
       cs.SettingID = setting.SettingID 
       cs.SettingKey = setting.SettingKey 
       cs.SettingValue = setting.SettingValue 
       cs.FriendlyName = setting.FriendlyName 
       cs.DisplayOrder = setting.DisplayOrder 
       dc.GetChangeSet() 
       dc.SubmitChanges() 
      End If 
     End Using

我的想法是，GetChangeSet失败，因为它没有看到任何本地对象被选中，正在注册一个变化。您不会更改任何名称，因此无需指定要缩小的显式值。

来源

2011-08-31 13:05:50

这似乎已经照顾它，谢谢！ –

AdminClarifireSetup类型只是.dbml文件中单个表的定义。我的自定义类是ClarifireSetup。但它看起来像单个需要是对象AdminClarifireSetup，实际的表对象，以便SubmitChanges传播回到数据库 –

难道说你缺少

... 
dc.ClarifireSetups.InsertOnSubmit(cs) 
dc.SubmitChanges()

来源

2011-08-31 12:41:19 edvaldig

dc.ClarifireSetups ...不高兴 –

该表名为AdminClarifireSetups，我的类名为ClarifireSetup 因此，dc.ClarifireSetup不起作用，因为它不是表格。 InsertOnSubmit需要表的一个实体作为参数，而不是类对象 –

InsertOnSubmit失败，它试图插入，不更新..看到上面 –

LINQ to SQL没有更新db的问题

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