C# 名字空间

失的猛

C#语法之名字空间

名字空间在内部和外部都是组织应用程序的好办法，很容易组织层次关系

名字空间默认类型internal.

为了结构化地管理程序,经常使用名字空间,名字空间的声明如下:

Namespace 空间 { 名字空间 }

 

在名字空间中，可以声明一个或多个：另一个名字空间、类、接口、结构、枚举、代表元.

 

1. /**
   
2.  * 引用PresentationFramework/System/WindowsBase;
   
3.  * 代码文件：stackApp.cs
   
4.  */
   
5. //Stack 名字空间
   
6. 
   
7. namespace Stack
   
8. {
   
9.     using System;
   
10.     public class Stack
    
11.     {
    
12.         //first:栈最上面一个节点
    
13. 
    
14.         private Node first = null;
    
15. 
    
16.         //count:栈中结点的数量
    
17. 
    
18.         private int count = 0;
    
19. 
    
20.         //判空属性,提供get访问器
    
21. 
    
22.         public bool Empty
    
23.         {
    
24.             get
    
25.             {
    
26.                 return (first == null);
    
27.             }
    
28.         }
    
29. 
    
30.         //计数属性，提供get访问器
    
31. 
    
32.         public int Count
    
33.         {
    
34.             get
    
35.             {
    
36.                 return count;
    
37.             }
    
38.         }
    
39. 
    
40.         //压栈操作，返回注意object
    
41. 
    
42.         public object Pop()
    
43.         {
    
44.             if (first == null)
    
45.             {
    
46.                 throw new InvalidOperationException("Can't pop from an empty stack.");
    
47.             }
    
48.             else
    
49.             {
    
50.                 object temp = first.Value;
    
51.                 first = first.Next;
    
52.                 count--;
    
53.                 return temp;
    
54.             }
    
55.         }
    
56. 
    
57.         //弹栈操作，返回空
    
58. 
    
59.         public void Push(object o)
    
60.         {
    
61.             first = new Node(o, first);
    
62.             count++;
    
63.         }
    
64. 
    
65.         //结点类
    
66. 
    
67.         class Node
    
68.         {
    
69.             //结点具有两个属性：自己、指向下一个结点
    
70. 
    
71.             public Node Next;
    
72.             public object Value;
    
73. 
    
74.             public Node(object value) : this(value, null) { }
    
75. 
    
76.             public Node(object value, Node next)
    
77.             {
    
78.                 Next = next;
    
79.                 Value = value;
    
80.             }
    
81.         }
    
82. 
    
83.         class StackApp
    
84.         {
    
85.             static void Main()
    
86.             {
    
87.                 Stack s = new Stack();
    
88. 
    
89.                 if (s.Empty)
    
90.                     Console.WriteLine("This is an empty Stack.");
    
91.                 else
    
92.                     Console.WriteLine("This is not an empty Stack.");
    
93. 
    
94.                 //往栈中压入5个结点
    
95. 
    
96.                 for (int i = 0; i < 5; ++i)
    
97.                     s.Push(i);
    
98. 
    
99.                 Console.WriteLine("往栈中压入了{0}个元素", s.Count);
    
100. 
     
101.                 //把栈中结点全部弹出来
     
102. 
     
103.                 for (int i = 0; i < 5; ++i)
     
104.                     Console.WriteLine("弹出了第{0}个元素，还剩{1}个元素.", (int)s.Pop() + 1, s.Count);
     
105. 
     
106.                 s = null;
     
107.                 System.Windows.Application app = new System.Windows.Application();
     
108.                 app.Run();
     
109.             }
     
110.         }
     
111.     }
     
112. }

参考来源：Visual C#时尚编程百例