如何获得表达结果？

Question

我构建如下表达式：

Expression left = Expression.Constant(5, typeof(int));
Expression right = Expression.Constant(6, typeof(int));
Expression result = Expression.Add(left,right);

那么，我可以通过表达式结果获得有关“ 5 + 6”的真实结果吗？

Answer 1

我认为您需要将其编译为Func：

Expression left = Expression.Constant(5, typeof(int));
Expression right = Expression.Constant(6, typeof(int));
Expression result = Expression.Add(left,right);

var compiled = Expression.Lambda<Func<int>>(result).Compile();
Console.WriteLine(compiled.Invoke());

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