How to tell if any entities in context are dirty with .Net Entity Framework 4.0

Question

I want to be able to tell if there is any unsaved data in an entity framework context. I have figured out how to use the ObjectStateManager to check the states of existing entities, but there are two issues I have with this.

1. I would prefer a single function to call to see if any entities are unsaved instead of looping though all entities in the context.
2. I can't figure out how to detect entities I have added. This suggests to me that I do not fully understand how the entity context works. For example, if I have the ObjectSet myContext.Employees, and I add a new employee to this set (with .AddObject), I do not see the new entity when I look at the ObjectSet and I also don't see the .Count increase. However, when I do a context.SaveChanges(), my new entity is persisted...huh?

I have been unable to find an answer to this in my msdn searches, so I was hoping someone here would be able to clue me in.

Thanks in advance.

Answer 1

var addedStateEntries = Context     .ObjectStateManager     .GetObjectStateEntries(EntityState.Added); 

Answer 2

Via extension method (for every ObjectContext):

internal static class ObjectContextExtensions {     public static bool IsContextDirty(this ObjectContext objectContext)     {         return objectContext             .ObjectStateManager             .GetObjectStateEntries(                 EntityState.Added |                  EntityState.Deleted |                  EntityState.Modified).Any();     } } 

or via partial method (only for your ObjectContext):

partial class MyModel {     public bool IsContextDirty()     {         return ObjectStateManager             .GetObjectStateEntries(                 EntityState.Added |                  EntityState.Deleted |                 EntityState.Modified).Any();     } }