C#反射之基础应用实例总结

using System;
using System.Collections.Generic;
using System.Text;
 
namespace reflectPrj
{
    /// <summary>
    /// 接口
    /// </summary>
    public interface Interface1
    {
        int Add(int num);
        int Add();
    }
    /// <summary>
    /// 用来被测试的类
    /// </summary>
    public class ReflectTest : Interface1
    {
  
        public string writea;
 
        public string WriteA
        {
            get { return writea; }
            set { writea = value ; }
        }
 
        public string Writeb;
 
        public string WriteB
        {
            get { return Writeb; }
            set { Writeb = value ; }
        }
 
        public ReflectTest()
        {
            this .WriteA = "WriteA" ;
            this .WriteB = "WriteB" ;
        }
 
        public ReflectTest(string a, string b)
        {
            this .WriteA = a;
            this .WriteB = b;
        }
 
        public int Add()
        {
            return 100;
        }
        public int Add(int num)
        {
            return num;
        }
 
        public string WriteString(string a,string b)
        {
             return " 欢迎你，" + a + "------" +b;
      
        }
 
        public static string WriteName(string s)
        {
            return " 欢迎光临，" + s;
        }
 
        public string WriteNoPara()
        {
            return " 你使用的是无参数方法！" ;
        }
 
        private string WritePrivate()
        {
            return " 私有类型的方法!" ;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using reflectPrj;
using System.Threading;
using System.Reflection;
 
namespace reflectPrjTest
{
    class MyReflectTest
    {
        // 建立委托
        delegate string TestDelegate (string a,string b);
 
        static void Main(string [] args)
        {
            Assembly assembly= Assembly .Load("reflectPrj" );
 
            foreach (Type var in assembly.GetTypes())
            {
                Console .WriteLine(var.Name);// 显示dll 下所有的类
            }
 
            //*******************************************************
 
            Module [] modules = assembly.GetModules();
 
            foreach (Module module in modules)
            {
                Console .WriteLine("module( 模块/ 组件) 名:" +module.Name);
            }
 
            //*******************************************************
            // 得到具体的类的类型
            Type a = typeof (reflectPrj.ReflectTest );
          
            Console .WriteLine(a.Name);
 
            //*******************************************************
            //A------ 创建类型的实例----> 此处是由带参的构造函数的来得到的实例
            string [] paras ={"aaa" ,"bbb" };
            // 创建该类的实例，后面的paras 为有参构造函数的参数----> 此obj 即是类型a 的一个实例
            // 此实例调用的是一个带参的构造函数
            object obj = Activator .CreateInstance(a,paras);
 
            // 得到对象的属性
            Console .WriteLine(" 得到对象a 的属性：" );
            foreach (object var in a.GetProperties())
             {
                 Console .WriteLine(var.ToString());
             }
          
            MethodInfo [] miArr = a.GetMethods();
 
            Console .WriteLine(" 显示所有的共有方法：" );
            // 显示所有的共有方法
            foreach (MethodInfo method in miArr)
            {
                Console .WriteLine(method.Name);
            }
          
            //************************************************************
            // 显示具体的方法
            Console .WriteLine(" 显示具体的方法！" );
 
            //1. 带参的方法的使用
            MethodInfo mi = a.GetMethod("WriteString" );
            string miReturn =(string ) mi.Invoke(obj, new object [] { " 使用的是带参数的非静态方法" , "2" });
 
            Console .WriteLine("---" +mi.Name+" 返回值：" +miReturn);
 
            //2. 不带参数的方法调用
            Console .WriteLine(" 不带参数的方法的调用：" );
            MethodInfo miNopara = a.GetMethod("WriteNoPara" );
 
            string miNoparaReturn = (string )miNopara.Invoke(obj, null );
 
            Console .WriteLine("---" +miNoparaReturn);
 
            //3. 私有类型方法的使用
            Console .WriteLine(" 私有类型方法的使用：" );
            MethodInfo miPrivate = a.GetMethod("WritePrivate" ,BindingFlags .Instance | BindingFlags .NonPublic);
 
            string miPrivateReturn = (string )miPrivate.Invoke(obj, null );
 
            Console .WriteLine("---" +miPrivateReturn);
 
            Console .WriteLine("*********************** 属性的使用**********************" );
 
            //4. 得到对象的属性
            PropertyInfo [] propertys = a.GetProperties(BindingFlags .Instance | BindingFlags .NonPublic |BindingFlags .Public);
         
            //5. 显示所有属性名
            Console .WriteLine(" 对象的所有属性名如下：" );
            foreach (PropertyInfo pro in propertys)
            {
                //Console.WriteLine(pro.Name);
                 // 获取属性最初的值
                Console .WriteLine(pro.Name+" ：" +pro.GetValue(obj,null ));
 
                // 给属性重新赋值
                pro.SetValue(obj, " 张三丰" , null );
                Console .WriteLine(pro.Name + " ：" + pro.GetValue(obj, null ));
 
             }
        
            //6. 获取指定的属性，并赋值
            PropertyInfo propertyInfo=a.GetProperty("WriteA" ,BindingFlags .Instance| BindingFlags .NonPublic|BindingFlags .Public);
 
            propertyInfo.SetValue(obj, " 郁金香" , null );
 
            Console .WriteLine(propertyInfo.Name+" ：" +propertyInfo.GetValue(obj,null ));
 
            Console .WriteLine("*********************FieldInfo--- 公开字段的使用***********************" );
            //7. 字段的使用----> 只能获取公开字段
            FieldInfo f1 = a.GetField("writea" ,BindingFlags .Instance| BindingFlags .NonPublic| BindingFlags.Public);
 
            Console .WriteLine(f1.GetValue(obj));
 
            try
            {
                reflectPrj.ReflectTest test = new ReflectTest ("Marry" , "Jack" );
 
                Type myReflect = typeof (ReflectTest );
 
                FieldInfo field1= myReflect.GetField("writea" , BindingFlags .Public | BindingFlags .NonPublic |BindingFlags .Instance);
 
                Console .WriteLine(field1.GetValue(test));
            }
            catch (Exception ex)
             {
                Console .WriteLine(ex.Message);
            }
 
            //*******************************************************
            //8. 构造函数的使用
            Console .WriteLine(" 获得构造函数的形式" );
            ConstructorInfo [] cis =a.GetConstructors();
            foreach (ConstructorInfo ci in cis)
            {
                Console .WriteLine(" 构造函数的形式:" +ci.ToString());// 获得构造函数的形式
                Console .WriteLine(" 构造函数名称：" +ci.Name);
            }
 
            // 打印带参构造函数的形式
            ConstructorInfo ascSingle = a.GetConstructor(new Type [] { typeof (string ),typeof (string )});
 
            Console .WriteLine(ascSingle.ToString());
 
            //****************************************************
            //9. 工厂模式
            Console .WriteLine(a.Name);
            reflectPrj.Interface1 reflectObj2 = (Interface1 )assembly.CreateInstance("reflectPrj.ReflectTest" );
            reflectPrj.ReflectTest reflectObj1 = (ReflectTest )assembly.CreateInstance("reflectPrj.ReflectTest" );
 
            Console .WriteLine(reflectObj2.Add());// 典型的工厂模式，在后续真正应用中使用的是接口中的方法（而接口又由实现接口的类来实现）
            Console .WriteLine(reflectObj1.WriteNoPara());
 
            //10 工厂模式--- 方法的重载
            int num = 300;
            Console .WriteLine(reflectObj1.Add(300));
 
            Console .WriteLine(" 工厂模式的再一次实现！" );
            foreach (Type type in assembly.GetTypes())
            {
                if (type.GetInterface("reflectPrj.Interface1" )!=null )
                {
                    // 由接口的实现类来实现该接口
                    reflectPrj.Interface1 interfaceObj3 = (Interface1 )Activator .CreateInstance(a);
 
                    Console .WriteLine(interfaceObj3.Add());
                    Console .WriteLine(interfaceObj3.Add(600));
                }
            }
            //****************************************************
            //11. 动态创建委托的简单例子---> 将委托绑定到目标方法上
            TestDelegate myMothod = (TestDelegate )Delegate .CreateDelegate(typeof (TestDelegate ),obj,mi);
 
            Console .WriteLine(myMothod.Invoke("Tom" , "Jack" ));
 
            //****************************************************
            //B----------. 无参构造函数的使用
            Console .WriteLine(" 无参构造函数的使用！" );
 
            //objNonePara 是由ReflectTest 类的构造函数所产生的对象
            object objNonePara = Activator .CreateInstance(a);
 
            string info=((reflectPrj.ReflectTest )objNonePara).WriteNoPara();
 
            Console .WriteLine(info);
 
            PropertyInfo proWriteA = a.GetProperty(((ReflectTest )objNonePara).WriteA);
            Console .WriteLine(proWriteA.GetValue(objNonePara,null ));
 
            proWriteA.SetValue(objNonePara, " 小小郁金香" , null );
 
            Console .WriteLine(proWriteA.GetValue(objNonePara, null ));
 
            //C:--------- 再次用带参的构造函数来产生实例
            ReflectTest objPara =(ReflectTest ) Activator .CreateInstance(a, new object [] {" 小郁" ," 来吧" });
            Console .WriteLine(objPara.WriteA+"/t" +objPara.WriteB);
            Console .WriteLine(objPara.WriteNoPara());
 
            // 调用带参的方法
            Console .WriteLine(objPara.WriteString(" 大郁" , " 回家吧！" ));
            MethodInfo myMi=a.GetMethod("WriteString" );
 
             // 利用委托动态的将将委托绑定的指定的方法
            myMothod=(TestDelegate )Delegate .CreateDelegate(typeof (TestDelegate ),objPara,myMi);
            Console .WriteLine(myMothod.Invoke(" 过年啦" , " 牛年快乐啊！" ));
 
            // 屏幕暂停
            Console .ReadLine();
        }
     }
}