C#中关于Attribute的基本用法

「爱情、让人受尽委屈。」 2022-07-13 01:41 124阅读 0赞

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Reflection;
    
    namespace ConsoleApplication
    {
        class Program
        {
            static void Main(string[] args)
            {
                MethodInfo method = typeof(Operation).GetMethod("Add");
                Attribute[] atts = Attribute.GetCustomAttributes(method);
                foreach (Attribute att in atts)
                {
                    if (att.GetType() == typeof(CommandAttribute))
                    {
                        Console.WriteLine(((CommandAttribute)att).Name + "," + ((CommandAttribute)att).Label);
                    }
                }
                Console.ReadLine();
                return;
    
                #region 获取所有的方法属性
    
                Operation testClass = new Operation();
                Type type = testClass.GetType();
                // Iterate through all the methods of the class.
                foreach (MethodInfo mInfo in type.GetMethods())
                {
                    // Iterate through all the Attributes for each method.
                    foreach (Attribute attr in Attribute.GetCustomAttributes(mInfo))
                    {
                        // Check for the AnimalType attribute.
                        if (attr.GetType() == typeof(CommandAttribute))
                            Console.WriteLine(
                                "Method {0} has a CommandAttribute {1},{2} .",
                                mInfo.Name, ((CommandAttribute)attr).Label, ((CommandAttribute)attr).Name);
                    }
                }
    
                #endregion
    
    
    
                Console.ReadLine();
            }
        }
    
        public class Operation
        {
            [CommandAttribute("AddLabel", "AddName")]
            public void Add()
            {
                Console.WriteLine("Add");
            }
    
            [CommandAttribute("DelLabel", "DelName")]
            public void Del()
            {
                Console.WriteLine("Del");
            }
        }
    
        [AttributeUsage(AttributeTargets.Method)]
        public class CommandAttribute : Attribute
        {
            public string Label { get; set; }
            public string Name { get; set; }
    
            public CommandAttribute() { }
    
            public CommandAttribute(string label, string name)
            {
                this.Label = label;
                this.Name = name;
            }
        }
    }