使用表达式求值程序在多个Enumerables上执行动态LINQ字符串 - DLR / NCalc / Flee？

Question

我有一个带属性的通用对象：

Class MyObject
{
    public Dictionary<string, Object> properties = new Dictionary<string, Object>();
    public object this[string name] { get { return properties[name]: null; }
}
List<MyObject> People= new List<MyObject>();
People.Add(new MyObject(age = 50, home = "Dublin", name = "Bob", Income = "50"));
People.Add(new MyObject(age = 45, home = "London", name = "Tim", Income = "90"));

List<MyObject> Cities= new List<MyObject>();
Cities.Add(new MyObject(City = "Dublin", Country = "IE"));
Cities.Add(new MyObject(City = "London", Country = "UK"));

我希望能够使用Linq查询这些Enumerables，但这些查询是动态并且会在字符串中，例如

People.
Where(a["age"] > 45 && Cities.Where(b["Country"] == "IE").Contains(a["home"]).
Sum(c["Income"])

有什么建议吗？我目前正在使用Ncalc和许多调用Linq代码的switch语句...

Answer 1

查看Dynamic Linq