linq - Substitute Non-Generic Lambda Expression for Generic Lambda Expression

Question

I have a this line of code:

var predicate = Expression.Lambda<Func<TEntityType, bool>>(body, param);

where TEntityType is a generic parm.

However, I don't have generic parm available. I do have:

Type _EntityType;

What is the non-generic syntax for Expression.Lambda is this case?

Thanks

Cameron MacFarland · Accepted Answer · 2009-05-12 23:52:58Z

11

There's an overload for Expression.Lambda that takes the type of the expression body, so you just need to create the type dynamically before calling that overload.

type lambdaType = typeof(Func<,>).MakeGenericType(_EntityType, typeof(bool));

var predicate = Expression.Lambda(lambdaType, body, param);

answered May 12, 2009 at 23:52

Cameron MacFarland

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