How can I execute an Oracle function from within a LINQ expression in Entity Framework 4?

Question

I am using Visual Studio 2010, C#, Entity Framework 4 and Oracle 10g.

I need to be able to return the result of a database function as a scalar property of an anonymous

Answer 1

Use the Model.Store namespace:

public partial class LINQtest2Entities
{
    [EdmFunction("LINQtest2Model.Store", "FNC_ADD")]
    public decimal FNC_ADD(decimal V1, decimal V2)
    {
        // don’t need to implement the function
        throw new ApplicationException();
    }
}

In case you have provided the namespace correctly everything works smoothly.

Answer 2

Your namespace arg to EdmFunctionAttribute looks suspicious. That looks like a CLR type, not a store space. This blog post might help you sort that out.