ObjectContext跟踪实体框架中的更改 [英] ObjectContext tracking changes in Entity Framwwork

问题描述

我需要知道在我的objectContext中是否有任何改变（包括附加和分离的实体）。我应该遍历我所有的ObjectSets中的所有实体，并检查它们的EntityState还是有较短的方法？

I need to know if in my objectContext any changes have been made (include attached and detached entities). Should I loop over all my entities in all my ObjectSets and check their EntityState or is there a shorter way?

推荐答案

已分离实体是分离的=上下文不了解它们，并且无法跟踪其更改。您不能循环访问您的ObjectSet - 它将整个数据库加载到您的应用程序！如果你想知道由上下文使用跟踪的实体的状态：

Detached entities are detached = context doesn't know about them and it cannot track its changes. You cannot loop through your ObjectSets - it would load whole your database to your application! If you want to know state of your entities tracked by the context use:

var entries = context.ObjectStateManager.GetObjectStateEntries(~EntityState.Detached);

这将收集您的 ObjectStateEntry 的集合每个条目代表单一跟踪实体或独立关联。

This will get your collection of ObjectStateEntry where each entry represents single tracked entity or independent association.

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