用反射或委托优化switch太长的方法

 1 public class SwitchMethod {        
 2         public string GetSerialNumber(string serialNumber)
 3         {
 4             return serialNumber;
 5         }
 6 
 7         public string GetName(string name)
 8         {
 9             return name;
10         }
11 
12         public string GetAge(string age)
13         {
14             return age;
15         }
16 
17         public string GetBirthday(string birthday)
18         {
19             return birthday;
20         }
21 
22     }

 1 string action =Console.ReadLine() ;
 2             var switchMethod=new SwitchMethod();
 3             switch (action)
 4             {
 5                 case "serialNumber":
 6                 Console.WriteLine(switchMethod.GetSerialNumber("1234"));    
 7                     break;
 8                 case "name":
 9                     Console.WriteLine(switchMethod.GetName("zhangsan"));
10                     break;
11                 case "age":
12                     Console.WriteLine(switchMethod.GetAge("21"));
13                     break;
14                 case "birthday":
15                     Console.WriteLine(switchMethod.GetBirthday("19960201"));
16                     break;
17             }

 1 public enum ActionEnum
 2     {
 3         /// 

 4         /// 编号
 5         /// 
 6         SerialNumber = 0,
 7         /// 

 8         /// 姓名
 9         /// 
10         Name = 1,
11         /// 

12         /// 年龄
13         /// 
14         Age = 2,
15         /// 

16         /// 生日
17         /// 
18         Birthday = 3
19     }

 1 private static void LoadDictionary()
 2         {
 3             if (AllDictionary.Count<=0)
 4             {
 5                 var switchMethod = new SwitchMethod();
 6                 AllDictionary.Add(ActionEnum.SerialNumber, switchMethod.GetSerialNumber);
 7                 AllDictionary.Add(ActionEnum.Age, switchMethod.GetAge);
 8                 AllDictionary.Add(ActionEnum.Birthday, switchMethod.GetBirthday);
 9                 AllDictionary.Add(ActionEnum.Name, switchMethod.GetName);
10             }            
11         }

1 public static string Exec(string str,Func<string, string> method) {
2             return method(str);
3         } 

1 Console.WriteLine(Exec("21", AllDictionary[ActionEnum.Age]));

1 public class MethodAttribute : Attribute
2     {
3         public ActionEnum MethodName;
4 
5         public MethodAttribute(ActionEnum methodName)
6         {
7             this.MethodName = methodName;
8         }
9     }

 1 public class BaseMethod
 2     {
 3         public Hashtable GetMethodAttribute(T t)
 4         {
 5             var hashtable = new Hashtable();
 6             Type type = t.GetType();            
 7             foreach (MethodInfo method in type.GetMethods())
 8             {
 9                 var methodArray = (MethodAttribute[]) method.GetCustomAttributes(typeof (MethodAttribute), false);
10                 foreach (MethodAttribute actionMethodAttribute in methodArray)
11                 {
12                     ActionEnum actiOnName= actionMethodAttribute.MethodName;
13                     hashtable.Add(actionName, method);
14                 }
15             }
16             return hashtable;
17         }
18 
19         
20         public string DoAction(ActionEnum actionName,string str) {
21             Hashtable ht = GetMethodAttribute(this);
22             string message = ht.Contains(actionName)
23                 ? ((MethodInfo) ht[actionName]).Invoke(this, new object[] {str}).ToString()
24                 : string.Format("{0} 超过范围", actionName);
25             return message;
26         }
27     }

 1     public class SwitchMethod : BaseMethod
 2     {
 3         [Method(ActionEnum.SerialNumber)]
 4         public string GetSerialNumber(string serialNumber)
 5         {
 6             return serialNumber;
 7         }
 8 
 9         [Method(ActionEnum.Name)]
10         public string GetName(string name)
11         {
12             return name;
13         }
14 
15         [Method(ActionEnum.Age)]
16         public string GetAge(string age)
17         {
18             return age;
19         }
20 
21         [Method(ActionEnum.Birthday)]
22         public string GetBirthday(string birthday)
23         {
24             return birthday;
25         }
26     }