Reflect all changes in the ObjectContext without persisting to the database

Question

Because ObjectContext.SaveChanges() occurs within a transaction I decided it would be best for my app to first perform all queries / updates on the ObjectContext before calling SaveChanges() once to write the data to the database.

However doing this means that if I create an object and subsquently query the ObjectContext it denies it exists (presumbily because the database has yet to be updated). I assumed I could get around this with some of the SaveOptions but it doesn't look like I can.

I basically want the ObjectContext to act like a proxy that I can modify as I wish to commit all in once go. Is there a way I can achieve this?

Answer 1

If you don't save changes your new objects don't exist in the database and no query executed against database (= no Linq to entities query) will return them. To get objects added to context but not saved yet you must query ObjectStateManager:

var data = context.ObjectStateManager
                  .GetObjectStateEntries(EntityState.Added)
                  .Where(e => !e.IsRelationship)
                  .Select(e => e.Entity)
                  .OfType<YourEntityType>();