取消删除标记为EntityState.Delete的实体? [英] Undelete an entity marked as EntityState.Delete?

问题描述

让我与代码交谈而不是交谈:

instead of talking let me talk with code:

Dim Contact = Context.Contacts.Include("Phones")
Dim phone = Contact.Phones(0)
Contact.Remove(phone)

我现在如何刷新上下文，取消上一个关系删除?

How do I refresh the context now, canceling last relation deletion?

我尝试过:

Context.Refresh(RefreshMode.StoreWins, phone) 'Doesn't recover the relation
Context.Refresh(RefreshMode.StoreWins, _
    ObjectStateManager.GetObjectStateEntries(EntityState.Deleted))

最后一个抛出InvalidOperationException: 要刷新的对象集合中索引0处的元素的EntityKey属性值为空，或者未附加到此ObjectStateManager.

the last one throws an InvalidOperationException: The element at index 0 in the collection of objects to refresh has a null EntityKey property value or is not attached to this ObjectStateManager.

重要 表结构:

联系人:名字，姓氏
电话:编号，备注
ContactPhone (多对多):ContactId(nav)，PhoneId(nav)

Contact: FirstName, LastName
Phone: Number, Note
ContactPhone (many-to-many): ContactId (nav), PhoneId (nav)

推荐答案

由于我认为这是一个错误，因此我向Microsoft报告了此错误，请投票并分享您的想法:

Since I believe this is a bug, I reported it to Microsoft please vote and share your ideas: http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=513174

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