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Last active August 29, 2015 14:07
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Dynamic Predicates
// using DynamicLinq
public static Func<TInput, TOutput> GetFuncFromLinq<TInput, TOutput>(this string predicate)
if (string.IsNullOrWhiteSpace(predicate)) return null;
LambdaExpression expression = DynamicExpression.ParseLambda(typeof(TInput), typeof(TOutput), predicate);
Func<TInput, TOutput> func = x => (TOutput)expression.Compile().DynamicInvoke(x);
return func;
// using CS-Script
public static Func<dynamic, bool> GetFuncFromScript(this string predicate)
if (string.IsNullOrWhiteSpace(predicate)) return null;
string scriptText = @"bool GetPredicate(dynamic e) { return " + predicate + "; }";
Func<dynamic, bool> result = CSScript.Evaluator.LoadDelegate<Func<dynamic, bool>>(scriptText);
return result;
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