Undelete an entity marked as EntityState.Delete?
instead of talking let me talk with code:
Dim Contact = Context.Contacts.Include("Phones")
Dim phone = Contact.Phones(0)
Contact.Remove(phone)
How do I refresh the context now, canceling last relation deletion?
I tried:
Context.Refresh(RefreshMode.StoreWins, phone) 'Doesn't recover the relation
Context.Refresh(RefreshMode.StoreWins, _
ObjectStateManager.GetObjectStateEntries(EntityState.Deleted))
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.
Important Table structure:
Contact: FirstName, LastName
Phone: Number, Note
ContactPhone (many-to-many): ContactId (nav), PhoneId (nav)
由于我认为这是一个错误，我向微软报告过，请投票并分享你的想法：http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=513174
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