行为型设计模式之模板方法(Template Method)

 1 using System;
 2 
 3     class Algorithm 
 4     {
 5         public void DoAlgorithm() 
 6         {
 7             Console.WriteLine("In DoAlgorithm");
 8             
 9             // do some part of the algorithm here
10             
11             // step1 goes here
12             Console.WriteLine("In Algorithm - DoAlgoStep1");            
13             // . . . 
14 
15             // step 2 goes here
16             Console.WriteLine("In Algorithm - DoAlgoStep2");            
17             // . . . 
18 
19             // Now call configurable/replacable part
20             DoAlgoStep3();
21 
22             // step 4 goes here
23             Console.WriteLine("In Algorithm - DoAlgoStep4");            
24             // . . . 
25 
26             // Now call next configurable part
27             DoAlgoStep5();
28         }
29 
30         virtual public void DoAlgoStep3()
31         {
32             Console.WriteLine("In Algorithm - DoAlgoStep3");        
33         }
34 
35         virtual public void DoAlgoStep5()
36         {
37             Console.WriteLine("In Algorithm - DoAlgoStep5");            
38         }
39     }
40 
41     class CustomAlgorithm : Algorithm
42     {
43         public override void DoAlgoStep3()
44         {
45             Console.WriteLine("In CustomAlgorithm - DoAlgoStep3");
46         }
47 
48         public override void DoAlgoStep5()
49         {
50             Console.WriteLine("In CustomAlgorithm - DoAlgoStep5");
51         }
52     }
53 
54     /// <summary>
55     ///    Summary description for Client.
56     /// </summary>
57     public class Client
58     {
59         public static int Main(string[] args)
60         {
61             CustomAlgorithm c = new CustomAlgorithm();
62 
63             c.DoAlgorithm();
64 
65             return 0;
66         }
67     }