access entity framework entity with inheritance

Question

I have entity A. Entity B inherits entity A. For entity B there are o propertis generated by entity framework for accessing it's content. How can access entity B?Do I have to provide my own methods, or can I force EF to cretae them?

what I do is: B inhirits A context.A - have access to entity A

but context.B does not exist. methods are not generated for accessing entity B.

Ladislav Mrnka · Accepted Answer · 2011-05-02 14:27:47Z

2

When you run queries on context.A it will return entities from whole inheritance hierarchy. So the result of context.A.ToList() will be all As and Bs. If you want to query only derived type you can use context.A.OfType<B>().ToList()

answered May 2, 2011 at 14:27

Ladislav Mrnka

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2 Comments

Ryan Over a year ago

please tell me is it a bad practice to use OfType? IS this usage of refflection bad for perfomance?

Ladislav Mrnka Over a year ago

It doesn't use reflection and it is absolutely correct approach.

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