CODEWITHSUNDEEP
c#entity-frameworkpoco
user610650
user610650

Reputation:

How to query the context so it creates subclassed POCO entities?

Say I have the following generated Entity Framework POCO class:

public partial class Foo
{
    #region Primitive Properties

    public virtual long Id { get; set; }

    #endregion
}

And I subclass it:

public class SubclassedFoo : Foo
{
    public override long Id
    {
        get { return base.Id; }
        set { base.Id = value; }
    }
}

How can the ObjectContext retrieve SubclassedFoo objects rather than Foo objects?

For example, what can I use instead of this?

ObservableCollection<Foo> foos = context.Foos

as in:

ObservableCollection<SubclassedFoo> subclassedFoos = context.???

Upvotes: 2

Views: 91

Answers (1)

Slauma
Slauma

Reputation: 177133

Filter with OfType<SubclassedFoo>:

List<SubclassedFoo> subclassedFoos = context.Foos
    .OfType<SubclassedFoo>()
    .ToList();

Or if you really want an ObservableCollection:

ObservableCollection<SubclassedFoo> subclassedFoos =
    new ObservableCollection<SubclassedFoo>(context.Foos
        .OfType<SubclassedFoo>()
        .AsEnumerable());

Upvotes: 1

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