Reference object property as a method parameter

Question

This won't work, but should give you an idea of what I'm trying to acheive:

public static IEnumerable<T> MyMethod<T>(this IEnumerable<T> entity, 
                               string param, string SomeProp)
{
    return entity.Where(l =>
    System.Data.Objects.SqlClient.SqlFunctions.PatIndex(param, l.SomeProp) > 0);
}

Do I have to pass the entire Where() parameter as a function to MyMethod?

recursive · Accepted Answer · 2013-06-14 14:29:59Z

3

Seeing your update, you can avoid repetition like this:

public static IEnumerable<T> MyMethod<T>(this IEnumerable<T> entity, 
                               string param, Func<T, string> selector)
{
    return entity.Where(l =>
    System.Data.Objects.SqlClient.SqlFunctions.PatIndex(param, selector(l)) > 0);
}

answered Jun 14, 2013 at 14:29

recursive

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3 Comments

Darren Over a year ago

return return won't compile.

Johan Over a year ago

Followup question: Is there any way to pass multiple properties? For example, I want to get ...PatIndex(param, l.SomeProp) > 0 && PatIndex(param, l.SomeOtherProp) > 0... How would I pass that as the function?

recursive Over a year ago

@Johan: You could achieve that by chaining calls. i.e. collection.MyMethod("p1", t => t.Prop1).MyMethod("p2", t => t.Prop2)

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