ObjectContext.Refresh()？

Question

如何更新数据存储中的所有脏实体,并将更改后的值重置为原始存储值？

ObjectContext.Refresh方法需要刷新实体作为参数.

Answer 1

以下通常有效:

Context.Refresh(RefreshMode.StoreWins, _
    Context.ObjectStateManager.GetObjectStateEntries())

它有时会导致EntityRelations出现问题.查看我的评论以获取更多详细信息.

Answer 2

您可以使用此代码:

public void RefreshAll()
{
     // Get all objects in statemanager with entityKey 
     // (context.Refresh will throw an exception otherwise) 
     var refreshableObjects = (from entry in context.ObjectStateManager.GetObjectStateEntries(
                                                 EntityState.Deleted 
                                               | EntityState.Modified 
                                               | EntityState.Unchanged)
                                      where entry.EntityKey != null
                                      select entry.Entity);

     context.Refresh(RefreshMode.StoreWins, refreshableObjects);
}

我写了一篇关于如何RefreshAll()的文章,并以其他方式刷新上下文:

http://christianarg.wordpress.com/2013/06/13/entityframework-refreshall-loaded-entities-from-database/