利用反射构造工厂

using System;
using System.Reflection;

namespace Reflex.factory
{
    class Program
    {
        static void Main(string[] args)
        {
            //普通工厂
            Ikess fk1 = FactoryManage.fnGetIkess("kess");
            fk1.write();

            Ikess fk2 = FactoryManage.fnGetIkess("kess2");
            fk2.write();

            Ikess fk3 = FactoryManage.fnGetIkess("kess3");
            fk3.write();

            //反射工厂
            string mNamespace = "Reflex.factory";
            Ikess k1 = ReflexFactoryManage.fnGetIkess(mNamespace,"kess");
            k1.write();

            Ikess k2 = ReflexFactoryManage.fnGetIkess(mNamespace, "kess2");
            k2.write();

            Ikess k3 = ReflexFactoryManage.fnGetIkess(mNamespace, "kess3");
            k3.write();

            ReflexFactoryManage fy = new ReflexFactoryManage(mNamespace);
            Ikess k4 = fy.fnGetIkess("kess4");
            k4.write();

            Console.ReadKey();
        }
    }

    /// <summary>
    /// 普通工厂，需要修改
    /// </summary>
    internal class FactoryManage
    {
        internal static Ikess fnGetIkess(string mClassName)
        {
            ///每次添加新类都要修改此处
            switch (mClassName)
            {
                case "kess":
                    return new kess();
                case "kess2":
                    return new kess2();
                case "kess3":
                    return new kess3();
                case "kess4":
                    return new kess4();
                default:
                    throw new Exception("不存在此工厂");
            }
        }
    }


    /// <summary>
    /// 反射工厂，不需要修改
    /// </summary>
    internal class ReflexFactoryManage
    {
        string mNamespace = "";
        internal ReflexFactoryManage(string mNamespace)
        {
            this.mNamespace = mNamespace;
        }

        internal Ikess fnGetIkess(string mClassName)
        {
            return Assembly.Load(mNamespace).CreateInstance(mNamespace + "." + mClassName) as Ikess;
        }

        internal static Ikess fnGetIkess(string mNamespace, string mClassName)
        {
            return Assembly.Load(mNamespace).CreateInstance(mNamespace + "." + mClassName) as Ikess;
        }

    }


    internal interface Ikess
    {
        void write();
    }

    internal class kess : Ikess
    {
        public void write()
        {
            Console.WriteLine("is kess");
        }
    }

    internal class kess2 : Ikess
    {
        public void write()
        {
            Console.WriteLine("is kess2");
        }
    }

    internal class kess3 : Ikess
    {
        public void write()
        {
            Console.WriteLine("is kess3");
        }
    }
    internal class kess4 : Ikess
    {
        public void write()
        {
            Console.WriteLine("is kess4");
        }
    }
}