Question

Supposed I have an entity framework entity named Foo, and in Foo a property called Bar.

Is there a way in the setter of Bar to get to the entity framework context?

public partial class Foo : IObjectWithChangeTracker
{
    public string Bar
    {
        get { /* ... */ }
        set
        {
            // How do I get the entity context here?
        }
    }

}

Answer 1

If I understand your question correctly my approach for doing this would be to add properties to Bar that are not under the data contract then write another method that retrieves the other object and set Bars properties there. But I may not understand your question for the reasons HighCore stated. The whole idea doesn’t make sense to me; an object does not own a context.

if (context.OtherObjectTable != null)
        {
            var otherObj = (from obj
                           in context.OtherObjectTable
                           where obj.Name == "Name/key for obj"
                           select obj).FirstOrDefault(); // ensures we only get one back

If you’re searching by primary key you just remove the FirstOrDefault(). If you can get back multiple results create another loop where you iterate over otherObj (potentially a list now) and filter on the next identifying property. After that loop you can just do normal assignment like

    Bar.Count = (int)otherObj.SomeInt32;