C#中实现对象间的更新操作

      最近工作的时候遇到一个问题，根据Web端接收到的对象obj1，更新对应的对象值ogj2。先判断obj1中属性值是否为null，

若不等于null，则更新obj2中对应属性值；若等于null，则保持obj2中对应属性值不变。

      先创建Student Class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Property
{
    public class Student
    {
        public string Name { get; set; }

        public string  number { get; set; }

        public string School {get;set;}

        public string  Score { get; set; }
    }
}

      方法实现：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Property
{
    class Program
    {
        static void Main(string[] args)
        {
            Student std1 = new Student();
            std1.Name = "Zhang San";
            std1.number = "1001";
            std1.School = "Jiangnan University";
            std1.Score = "87.98";

            Student std2 = new Student();
            std2.Name = "Li Si";
            std2.Score = "98.98";

            Console.WriteLine("Before:");
            foreach (System.Reflection.PropertyInfo p in std1.GetType().GetProperties())
            {
                Console.WriteLine("{0}:   {1}", p.Name, p.GetValue(std1,null));
 
            }

            foreach (System.Reflection.PropertyInfo p in std2.GetType().GetProperties())
            {
                //Console.WriteLine("{0}:   {1}", p.Name, p.GetValue(std2, null));
                if (p.GetValue(std2, null) != null)
                    p.SetValue(std1, p.GetValue(std2, null), null);
            }
            Console.WriteLine("After:");
            foreach (System.Reflection.PropertyInfo p in std1.GetType().GetProperties())
            {
                Console.WriteLine("{0}:   {1}", p.Name, p.GetValue(std1, null));

            }
            Console.ReadKey();

        }
    }
}

        结果：

　　

2016-04-30