C# 一个简单的 工厂模式 例子

首先定义一个接口类：

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

namespace MY_Factory
{
    /// <summary>
    /// interface 是接口，实现接口
    /// </summary>
    public interface ICoat
    {
        /// <summary>
        /// 方法1
        /// </summary>
        void GetYourCoat();
        /// <summary>
        /// 方法2
        /// </summary>
        void GetYourCoat2();
    }
}

再定义两个类，来继承此接口

namespace MY_Factory.SimpleFactory
{
    public class FashionCoat : ICoat
    {
        public void GetYourCoat()
        {
            Console.WriteLine("时尚上衣");//get();
        }
        public void GetYourCoat2()
        {
            Console.WriteLine("时尚上衣2");
        }

namespace MY_Factory.SimpleFactory
{
    public class BusinessCoat : ICoat
    {
       
        public void GetYourCoat()
        {
            Console.WriteLine("商务上衣");
            //get();
        }
        public void GetYourCoat2()
        {
            Console.WriteLine("商务上衣2");
        }

再定义一个工厂类

namespace MY_Factory
{
    public class mySimpleFactory
    {
        public ICoat CreateCoat(string classname)
        {
            switch (classname.Trim().ToLower())
            {
                case"business":
                    {
                        return new BusinessCoat();
                    }
                case "fashion":
                    {
                        return new FashionCoat(); 
                    }
                    default :  throw new Exception("还没有你要的那种衣服");

           }
        }
    }
}

最后，调用

            ICoat Icoat;
            try
            {
                mySimpleFactory mysf = new mySimpleFactory();
                Console.WriteLine("我要的是时尚上衣	");
                Icoat = mysf.CreateCoat("fashion");
                Icoat.GetYourCoat();

                Console.WriteLine("我还要一件商务上衣	");
                Icoat = mysf.CreateCoat("business");
                Icoat.GetYourCoat();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }