How to force refresh all entities in Entity Framework 4.0

I'm wondering if it is possible to refresh开发者_运维技巧 all entities from data model as opposite to refresh them one by one.

Something like entities.RefreshAll();

Yes you can use this code:

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.Added 
                                               | EntityState.Deleted 
                                               | EntityState.Modified 
                                               | EntityState.Unchanged)
                                      where entry.EntityKey != null
                                      select entry.Entity);

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

I wrote another couple of ways of refreshing with EF:

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