C#中反射的使用（How to use reflect in CSharp）（1）

最近想做一个插件式的软件给公司的监控用，初步的想法是使用C#去反射Dll，Invoke其中的方法。此文仅供开发参考，不涉及原理，98%的代码以及2%的废话。

测试Solution是这么建的（.NET FRAMEWORK 4.5.1）：

Person类代码：

using System;
using System.Collections.Generic;
using System.Linq;

namespace PersonMoudle
{
    public class Person
    {
        public Person()
        {
            Name = "Sirius";
            Age = 25;
            Height = 172;
            Sex = "Middle";
        }
        public Person(string name, int age, float height, string sex)
        {
            Name = name;
            Age = age;
            Height = height;
            Sex = sex;
        }

        public string Name { get; set; }
        public int Age { get; set; }
        public float Height { get; set; }
        public string Sex { get; set; }

        public void Speak(string words)
        {
            Console.WriteLine(words);
        }
        private string GetMyName()
        {
            return Name.Trim();
        }

        public string GetMySex()
        {
            return Sex;
        }

        public List<string> BeenCity()
        {
            return new List<string>
            {
                "Beijing",
                "Jinan",
                "NewYork"
            };
        }

        public List<string> BennCity(int count)
        {
            return new List<string>
            {
                "Beijing",
                "Jinan",
                "NewYork"
            }.Take(count).ToList();
        }
    }
}

控台中反射获取信息代码（控台引用类库项目，也可以load dll，后面的篇幅会写）：

using System;
using System.Linq;
using PersonMoudle;

namespace ReflectionTest
{
    class Program
    {
        static void Main(string[] args)
        {
            var count = 0;//public count set;

            var person = new Person();
            var personType = person.GetType();
            Console.WriteLine("类型名： " + personType.Name);
            Console.WriteLine("类全名： " + personType.FullName);
            Console.WriteLine("命名空间名： " + personType.Namespace);
            Console.WriteLine("程序集名： " + personType.Assembly);
            Console.WriteLine("模块名： " + personType.Module.Name);
            Console.WriteLine("是否支持泛型： "+personType.IsConstructedGenericType);

            //获取构造函数信息
            var conInfo = personType.GetConstructors();
            Console.WriteLine(personType.FullName + "共有" + conInfo.Count() + "个构造函数");
            foreach (var constructorInfo in conInfo)
            {
                count += 1;
                Console.WriteLine("第" + count + "个构造函数：");
                var paramsInfo = constructorInfo.GetParameters();
                Console.WriteLine(paramsInfo.Any() ? "参数列表：" : "无参数。");
                foreach (var parameterInfo in paramsInfo)
                {
                    Console.WriteLine("第" + (parameterInfo.Position + 1) + "参数名：" + parameterInfo.Name + ", 参数类型：" +
                                      parameterInfo.ParameterType.FullName);
                }
            }
            count = 0;

            //获取事件信息
            var eventInfo = personType.GetEvents();
            Console.WriteLine(personType.FullName+"共有"+eventInfo.Count()+"个事件");

            //获取字段信息
            var fields = personType.GetFields();
            Console.WriteLine(personType.FullName + " has " + fields.Count() + "fields.");
            foreach (var fieldInfo in fields)
            {
                count += 1;
                Console.WriteLine("The "+count+"st field is"+fieldInfo.Name+", type is "+fieldInfo.FieldType);   
            }
            count = 0;

            //获取接口信息
            var ifaces = personType.GetInterfaces();
            Console.WriteLine(personType.FullName + " has " + ifaces.Count() + " interfaces.");
            

            //获取成员信息
            var members = personType.GetMembers();
            Console.WriteLine(personType.FullName+" has "+members.Count()+" members.");
            foreach (var memberInfo in members)
            {
                count += 1;
                Console.WriteLine("The " + count + "st member name is " + memberInfo.Name + ", type is " +
                                  memberInfo.ReflectedType);
            }
            count = 0;

            //获取方法信息
            var methods = personType.GetMethods();
            Console.WriteLine(personType.FullName+" has "+methods.Count()+" methods.");
            foreach (var methodInfo in methods)
            {
                count += 1;
                var paramInfos = methodInfo.GetParameters();
                Console.WriteLine("The " + count + "st method is " + methodInfo.Name + ", return type is " +
                                  methodInfo.ReturnType + ", param count is " + paramInfos.Count());

                Console.WriteLine(paramInfos.Any() ? "参数列表：" : "无参数。");
                foreach (var parameterInfo in paramInfos)
                {
                    Console.WriteLine("param name:" + parameterInfo.Name + ", param type: " +
                                      parameterInfo.ParameterType);
                }
            }
            count = 0;

            //propertites
            var pros = personType.GetProperties();
            Console.WriteLine(personType.FullName+" has "+pros.Count()+ "public properties.");

            Console.ReadKey();
        }
    }
}

下一篇讲如何调用方法。