数据结构通用算法(深拷贝+比较)

  1     public class CompareIgnoreAttribute : Attribute
  2     {
  3     };
  4 
  5     [Serializable] // 深拷贝需要
  6     public abstract class DataInfo
  7     {
  8         // 快速深拷贝
  9         public static object copy(object th)
 10         {
 11             MemoryStream ms = new MemoryStream();
 12             BinaryFormatter bf = new BinaryFormatter();
 13             bf.Serialize(ms, th);
 14             ms.Seek(0, 0);
 15             object th2 = bf.Deserialize(ms);
 16             ms.Close();
 17             return th2;
 18         }
 19 
 20         // 比较
 21         public static bool Equ(object th1, object th2)
 22         {
 23             try
 24             {
 25                 if (th1 == null || th2 == null)
 26                 {
 27                     if (th1 == null && th2 == null)
 28                     {
 29                         return true;
 30                     }
 31                     else
 32                     {
 33                         return false;
 34                     }
 35                 }
 36 
 37                 if (th1.GetType() != th2.GetType())
 38                 {
 39                     return false;
 40                 }
 41 
 42                 if (th1 is IList)
 43                 {
 44                     IList l1 = th1 as IList;
 45                     IList l2 = th2 as IList;
 46                     if (l1.Count != l2.Count)
 47                     {
 48                         return false;
 49                     }
 50                     else
 51                     {
 52                         for (int i = 0; i < l1.Count; ++i)
 53                         {
 54                             if (!DataInfo.Equ(l1[i], l2[i]))
 55                             {
 56                                 return false;
 57                             }
 58                         }
 59                     }
 60                 }
 61                 else if (th1.GetType().IsValueType || th1.GetType().IsEnum || th1.GetType() == typeof(string))
 62                 {
 63                     if (th1.ToString() != th2.ToString())
 64                     {
 65                         return false;
 66                     }
 67                 }
 68                 else
 69                 {
 70                     PropertyDescriptorCollection pdcs = TypeDescriptor.GetProperties(th1);
 71                     foreach (PropertyDescriptor pd in pdcs)
 72                     {
 73                         bool bIgnore = false;
 74                         // 检查是否有“比较忽略”属性，有则跳过检查
 75                         foreach (Attribute at in pd.Attributes)
 76                         {
 77                             if (at is CompareIgnoreAttribute)
 78                             {
 79                                 bIgnore = true;
 80                                 break;
 81                             }
 82                         }
 83 
 84                         if (!bIgnore)
 85                         {
 86                             object ob1 = pd.GetValue(th1);
 87                             object ob2 = pd.GetValue(th2);
 88                             if (!DataInfo.Equ(ob1, ob2))
 89                             {
 90                                 return false;
 91                             }
 92                         }
 93                     }
 94                 }
 95             }
 96             catch (Exception)
 97             {
 98                 // 不应有异常
 99             }
100 
101             return true;
102         }
103 
104         //以下的方法仅给子类使用
105         public virtual DataInfo copy()
106         {
107             return DataInfo.copy(this) as DataInfo;
108         }
109         public virtual bool Equ(DataInfo th)
110         {
111             return DataInfo.Equ(this, th);
112         }
113     };

 1     [Serializable] // 深拷贝需要
 2     public class Car : DataInfo
 3     {
 4         public string m_name;
 5         public string Name
 6         {
 7             get { return m_name; }
 8             set { m_name = value; }
 9         }
10 
11         //[CompareIgnore] 加在这边没用
12         protected double m_price;
13         [CompareIgnore]
14         public double Price
15         {
16             get { return m_price; }
17             set { m_price = value; }
18         }
19 
20         public Car(string name, double price)
21         {
22             this.m_name = name;
23             this.m_price = price;
24         }
25     }

1     class Program
2     {
3         static void Main(string[] args)
4         {
5             Car a = new Car("a", 199999.99);
6             Car b = a.copy() as Car;
7             Console.WriteLine("Name " + b.Name.ToString() + ";Price " + b.Price.ToString());
8         }
9     }

 1     class Program
 2     {
 3         static void Main(string[] args)
 4         {
 5             Car a = new Car("a", 99999.99);
 6             Car b = new Car("a", 199999.99);
 7             bool bSame = a.Equ(b);
 8             Console.WriteLine(bSame.ToString());
 9         }
10     }