面向对象的编程中肯定会用到继承。有的情况下想把父类的值赋值给子类，你会怎么做呢？new一个父类的实例，再new一个子类的实例，然后逐个将属性赋值。本质上也确实这样赋值的，但是如果在程序用逐个去赋值就比较麻烦了，这个过程可以用一个归纳为一个方法来完成。如下：
父类： 
public class ParentClass     {         private string id = string.Empty;           private string name = string.Empty;           private int age = 0;           private string address = string.Empty;           /// <summary>         /// ID         /// </summary>         public string ID         {             get { return id; }               set { id = value; }         }         /// <summary>         /// 姓名         /// </summary>         public string Name         {             get { return name; }               set { name = value; }         }         /// <summary>         /// 年龄         /// </summary>         public int Age         {             get { return age; }             set { age = value; }         }         /// <summary>         /// 住址         /// </summary>         public string Address         {             get { return address; }             set { address = value; }         }     }
子类： 
 public class ChildClass:ParentClass     {         private decimal scored = 0;           private int? rank = null;           /// <summary>         /// 成绩         /// </summary>         public decimal Scored         {             get { return scored; }               set { scored = value; }         }         /// <summary>         /// 名次         /// </summary>         public int? Rank         {             get { return rank; }               set { rank = value; }         }     }
遍历父类的属性赋值给子类的方法： 
 private static ChildClass AutoCopy(ParentClass parent)         {             ChildClass child = new ChildClass();               var ParentType = typeof(ParentClass);               var Properties = ParentType.GetProperties();               foreach (var Propertie in Properties)             {                 if (Propertie.CanRead && Propertie.CanWrite)                 {                     Propertie.SetValue(child, Propertie.GetValue(parent, null), null);                 }             }               return child;         }
调用： 
static void Main(string[] args)         {             ParentClass parent = new ParentClass();               parent.ID = "01";               parent.Name = "Sam";               parent.Age = 26;               parent.Address = "Beijing";               ChildClass child = AutoCopy(parent);               child.Scored = 90;               child.Rank = 1;               string result = string.Format("ID:{0} Name={1} Age={2} Address={3}", child.ID, child.Name, child.Age, child.Address);               string resultExtend = string.Format("Scored:{0} Rank={1}", child.Scored, child.Rank);               Console.WriteLine(result);               Console.WriteLine(resultExtend);               Console.ReadLine();         }
输出结果：

代码下载： http://download.youkuaiyun.com/detail/yysyangyangyangshan/5540909