我的RIA服务环境类有一个实体集TaskToOperationAssociations其中包含的任务来操作的关联列表。

My RIA service context class has an entity set TaskToOperationAssociations which contains a list of Task to Operation associations.

有没有办法来找已经从集合中删除的关联实体？我可以看到的范围内有一个引用删除协会在它的私有字段（它显然需要跟踪它，删除操作，可以提交）。

Is there a way to "find" an association entity which has been removed from the collection? I can see that the context has a reference to the removed Association in it's private fields (it obviously needs to keep track of it so the delete operation can be submitted).

下面是一个例子...

Here's an example...

如果余有任务的A（与标识= T 1），其相关联的操作的X，Y和Z（与ID的O1，O2和O3）和任务B（与标识= T2）与相同的操作相关联那么集合将包含3 TaskToOperationAssociations如下...

If I have Task "A" (with Id=T1) which is associated to Operation X, Y and Z (with id's O1,O2 and O3) and task B (with Id=T2) is associated with the same operations then the collection will contain 3 TaskToOperationAssociations as follows...

协会A1，任务id = T1，OperationID = 1 协会A2，任务id = T1，OperationID = 2 协会A3，任务id = T1，OperationID = 3 协会A4，任务id = T2，OperationID = 1 协会A5，任务id = T2，OperationID = 2 协会A6，任务id = T2，OperationID = 3

我删除联想A1和赶上TaskToOperationAssociations的属性更改事件。在事件处理程序我想看看是否有任何关联的任务T1的改变了，所以我可以使保存在UI按钮。

I remove association A1 and catch the property change event of the TaskToOperationAssociations. In the event handler I want to find out if any of the associations for Task T1 have changed so I can enable a save button on the UI.

希望这是有道理的。 谢谢 本

Hope this makes sense. Thanks Ben

推荐答案

有没有办法只使用范围内做到这一点。我被包裹的背景和人工跟踪缺失固定它。

There is no way to do this using only the context. I fixed it by wrapping the context and tracking deletions manually.