使用ExPRession tree訪問類的屬性名稱與值

　　表達式樹Expression是Linq中一項比較重要的功能，對其深刻了解Lamda以及計算表達式有很大的幫助.

下面是利用 Expression<Func<Object>>[]取得Func<Object>中的操作數或成員名稱以及值。

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Linq.Expressions;using System.Reflection;namespace ExpressionTree{    class Program    {        static void Main(string[] args)        {            MyClass cls = new MyClass() { Memo = "ffffddddd", Name = "dfdf", Age = 33 };            Dictionary<string, string> dic = GetProps(() => cls.Memo, () => cls.Age);            foreach (KeyValuePair<string,string> item in dic)            {                Console.WriteLine(item.Key + "=" + item.Value);            }            Console.Read();        }        static Dictionary<string, string> GetProps(params Expression<Func<Object>>[] funcs)        {            Dictionary<string, string> dic = new Dictionary<string, string>();            MemberExpression member = null;            UnaryExpression unary = null;            foreach (Expression<Func<Object>> func in funcs)            {                unary = func.Body as UnaryExpression;                if (unary != null)                {                    member = unary.Operand as MemberExpression;                }                else                {                    member = func.Body as MemberExpression;                }                PropertyInfo prop = member.Member as PropertyInfo;                object value    = func.Compile().Invoke();                dic.Add(prop.Name, Convert.ToString(value));            }            return dic;        }    }    class MyClass    {        public string Name { get; set; }        public int Age { get; set; }        public string Memo { get; set; }    }}