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 = "";
             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