Question

I have a process that needs the Primary Key ID of a newly added Entity every time an Entity is added. I have overriden the SaveChanges() method of DbContext, and looked at the ChangeTracker, but I don’t see any dynamic way to retrieve the Entities that are newly added. Is there a good method to do so?

Answer 1

Query the change tracker for new entities.

public override int SaveChanges()
{
    var newEntities = ChangeTracker.Entries()
                        .Where(entry => entry.State == EntityState.Added)
                        .Select(entry => entry.Entity).ToList();

    var count = base.SaveChanges();

    // do something with newEntities

    return count;
}