Question

Whats an easy (less code) way to add business logic to a ‘code first’ model to execute before its saved to the database?

E.g. given the Albums model from the music store example

public class Album
{
    public string Title { get; set; }
    public Genre Genre { get; set; }

    public DateTime LastUpdated { get; private set;}
}

e.g. if we add a LastUpdated property to the example, how can we ensure it’s automatically set if the entity is updated – perhaps on a save using someting like

private void album_OnSave()
{
   this.LastUpdated = DateTime.Now;
}

Answer 1

• MSDN – EF4 How to: Execute Business Logic When Saving Changes