简单工厂模式(Simple Factory Pattern)
简单工厂模式定义一个类来负责创建其他类的实例，被创建的实例通常都具有共同的父类。因为在简单工厂模式中用于创建实例的方法是静态（static）方法，又叫做静态工厂方法（Static Factory Method）模式，简单工厂模式是属于创建型模式。
using System;
namespace ConsoleApplication
{//一般每个接口或类都写在单独的.cs文件中//本示例为了执行查看方便才写在一起public interface Database{void Delete();void Insert();}//Sqlserver的增删public class Sqlserver : Database{public void Delete(){Console.WriteLine("delete data from sqlserver");}public void Insert(){Console.WriteLine("insert data to sqlserver");}}//Mysql的增删public class Mysql : Database{public void Delete(){Console.WriteLine("delete data from Mysql");}public void Insert(){Console.WriteLine("insert data to Mysql");}}public static class IFactory{//根据需求创建public static Database CreateDatabase(string dbType){Database db = null;switch (dbType){case "Sqlserver":db = new Sqlserver();break;case "Mysql":db = new Mysql();break;default:break;}return db;}}class Program{static void Main(string[] args){Database db1 = IFactory.CreateDatabase("Sqlserver");db1.Delete();db1.Insert();Database db2 = IFactory.CreateDatabase("Mysql");db2.Delete();db2.Insert();Console.ReadKey();Console.ReadKey();}}
}
)
