[9-3]namespace and using

李泳霖

namespace 為一個空間,可以存放很多模板的空間,功用:分類與管理模板,如同資料夾般
如下:
Person這個模板(類別clss)是屬於Animal這個空間的

1. namespace Animal
   
2. {
   
3.     class Person
   
4.     {
   
5.         public double height;
   
6.         public int age;
   
7.         public string name;
   
8. 
   
9.     }
   
10. }
    
11. namespace house
    
12. {
    
13. 
    
14. }

複製代碼

所以當有人要使用到Person，必須使用以下方法

1. Animal.Person person1 = new Animal.Person();//顯得麻煩
   
2. person1.height = 150;
   
3. person1.age = 42;
   
4. person1.name = "大大";
   
5. 
   
6. Animal.Person person2 = new Animal.Person();
   
7. person2.height = 180;
   
8. person2.age = 20;
   
9. person2.name = "小小";
   
10. 
    
11. 
    
12. System.Console.WriteLine("姓名: "+person1.name);
    
13. System.Console.WriteLine("年齡: " + person1.age);
    
14. System.Console.WriteLine("身高: " + person1.height);
    
15. 
    
16. System.Console.WriteLine("==================================");
    
17. System.Console.WriteLine("姓名: " + person2.name);
    
18. System.Console.WriteLine("年齡: " + person2.age);
    
19. System.Console.WriteLine("身高: " + person2.height);

複製代碼

1. //class 、 object
   
2. using Animal;
   
3. using System;
   
4. Person person1 = new Person();
   
5. person1.height = 150;
   
6. person1.age = 42;
   
7. person1.name = "大大";
   
8. 
   
9. Person person2 = new Person();
   
10. person2.height = 180;
    
11. person2.age = 20;
    
12. person2.name = "小小";
    
13. 
    
14. 
    
15. Console.WriteLine("姓名: "+person1.name);
    
16. Console.WriteLine("年齡: " + person1.age);
    
17. Console.WriteLine("身高: " + person1.height);
    
18. 
    
19. Console.WriteLine("==================================");
    
20. Console.WriteLine("姓名: " + person2.name);
    
21. Console.WriteLine("年齡: " + person2.age);
    
22. Console.WriteLine("身高: " + person2.height);

複製代碼

namespace 內也可以再新增namespace
如下所示:

1. namespace Animal
   
2. {
   
3.     namespace qq
   
4.     {
   
5.         class Person
   
6.         {
   
7.             public double height;
   
8.             public int age;
   
9.             public string name;
   
10. 
    
11.         }
    
12.     }
    
13. 
    
14. }
    
15. namespace house
    
16. {
    
17. 
    
18. }

複製代碼

1. //class 、 object
   
2. using Animal.qq;
   
3. using System;
   
4. Person person1 = new Person();
   
5. person1.height = 150;
   
6. person1.age = 42;
   
7. person1.name = "大大";
   
8. 
   
9. Person person2 = new Person();
   
10. person2.height = 180;
    
11. person2.age = 20;
    
12. person2.name = "小小";
    
13. 
    
14. 
    
15. Console.WriteLine("姓名: "+person1.name);
    
16. Console.WriteLine("年齡: " + person1.age);
    
17. Console.WriteLine("身高: " + person1.height);
    
18. 
    
19. Console.WriteLine("==================================");
    
20. Console.WriteLine("姓名: " + person2.name);
    
21. Console.WriteLine("年齡: " + person2.age);
    
22. Console.WriteLine("身高: " + person2.height);

複製代碼