C# Attribute的用法

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Reflection;
 6 
 7 namespace ConsoleApplication1
 8 {
 9     class Program
10     {
11         static void Main(string[] args)
12         {
13             //Operation op = new Operation();
14             MethodInfo method = typeof(Operation).GetMethod("Add");
15             Attribute[] atts = Attribute.GetCustomAttributes(method);
16             foreach (Attribute att in atts)
17             {
18                 if (att.GetType() == typeof(CommandAttribute))
19                 {
20                     Console.WriteLine(((CommandAttribute)att).Name + "," + ((CommandAttribute)att).Label);
21                 }
22             }
23             Console.ReadLine();
24             return;
25 
26             #region 获取所有的方法属性
27 
28             Operation testClass = new Operation();
29             Type type = testClass.GetType();
30             // Iterate through all the methods of the class.
31             foreach (MethodInfo mInfo in type.GetMethods())
32             {
33                 // Iterate through all the Attributes for each method.
34                 foreach (Attribute attr in Attribute.GetCustomAttributes(mInfo))
35                 {
36                     // Check for the AnimalType attribute.
37                     if (attr.GetType() == typeof(CommandAttribute))
38                         Console.WriteLine(
39                             "Method {0} has a CommandAttribute {1},{2} .",
40                             mInfo.Name, ((CommandAttribute)attr).Label, ((CommandAttribute)attr).Name);
41                 }
42             }
43 
44             #endregion
45 
46 
47 
48             Console.ReadLine();
49         }
50     }
51 
52 
53 
54 
55     public class Operation
56     {
57         [Command("AddLabel", "AddName")]
58         public void Add()
59         {
60             Console.WriteLine("Add");
61         }
62 
63         [Command("DelLabel", "DelName")]
64         public void Del()
65         {
66             Console.WriteLine("Del");
67         }
68     }
69 
70     [AttributeUsage(AttributeTargets.Method)]
71     public class CommandAttribute : Attribute
72     {
73         public string Label { get; set; }
74         public string Name { get; set; }
75 
76         public CommandAttribute() { }
77 
78         public CommandAttribute(string label, string name)
79         {
80             this.Label = label;
81             this.Name = name;
82         }
83     }
84 }