易采站长站为您分析C#设计模式编程中对建造者模式的运用,文中还介绍了在.NET框架下建造者模式编写思路的实现,需要的朋友可以参考下
示例
我们先来以这样一个场景引入：
在电脑城装机总有这样的经历。我们到了店里，先会有一个销售人员来询问你希望装的机器是怎么样的配置，他会给你一些建议，最终会形成一张装机单。和客户确定了装机配置以后，他会把这张单字交给提货的人，由他来准备这些配件，准备完成后交给装机技术人员。技术人员会把这些配件装成一个整机交给客户。
不管是什么电脑，它总是由CPU、内存、主板、硬盘以及显卡等部件构成的，并且装机的过程总是固定的：
- 把主板固定在机箱中
- 把CPU安装到主板上
- 把内存安装到主板上
- 把硬盘连接到主板上
-
把显卡安装到主板上
但是，每台兼容机的部件都各不相同的，有些配置高一点，有些配置低一点，这是变化点。对于装机技术人员来说，他不需要考虑这些配件从哪里来的，他只需要把他们组装在一起了，这是稳定的装机流程。要把这种变化的配件和稳定的流程进行分离就需要引入Builder模式。
示例代码using System; using System.Collections.Generic; using System.Text; using System.Reflection; namespace BuilderExemple { classProgram { staticvoid Main(string[] args) { ComputerFactory factory = newComputerFactory(); ComputerBuilder office = newOfficeComputerBuilder(); factory.BuildComputer(office); office.Computer.ShowSystemInfo(); ComputerBuilder game = newGameComputerBuilder(); factory.BuildComputer(game); game.Computer.ShowSystemInfo(); } } classComputerFactory { publicvoid BuildComputer(ComputerBuilder cb) { Console.WriteLine(); Console.WriteLine(">>>>>>>>>>>>>>>>>>Start Building " + cb.Name); cb.SetupMainboard(); cb.SetupCpu(); cb.SetupMemory(); cb.SetupHarddisk(); cb.SetupVideocard(); Console.WriteLine(">>>>>>>>>>>>>>>>>>Build " + cb.Name + " Completed"); Console.WriteLine(); } } abstractclassComputerBuilder { protectedstring name; publicstring Name { get { return name; } set { name = value; } } protectedComputer computer; publicComputer Computer { get { return computer; } set { computer = value; } } public ComputerBuilder() { computer = newComputer(); } publicabstractvoid SetupMainboard(); publicabstractvoid SetupCpu(); publicabstractvoid SetupMemory(); publicabstractvoid SetupHarddisk(); publicabstractvoid SetupVideocard(); } classOfficeComputerBuilder : ComputerBuilder { public OfficeComputerBuilder() { name = "OfficeComputer"; } publicoverridevoid SetupMainboard() { computer.Mainboard = "Abit升技LG-95C 主板(Intel 945GC芯片组/LGA 775/1066MHz) "; } publicoverridevoid SetupCpu() { computer.Cpu = "Intel 英特尔赛扬D 336 (2.8GHz/LGA 775/256K/533MHz) "; } publicoverridevoid SetupMemory() { computer.Memory = "Patriot博帝DDR2 667 512MB 台式机内存"; } publicoverridevoid SetupHarddisk() { computer.Harddisk = "Hitachi日立SATAII接口台式机硬盘(80G/7200转/8M)盒装"; } publicoverridevoid SetupVideocard() { computer.Videocard = "主板集成"; } } classGameComputerBuilder : ComputerBuilder { public GameComputerBuilder() { name = "GameComputer"; } publicoverridevoid SetupMainboard() { computer.Mainboard = "GIGABYTE技嘉GA-965P-DS3 3.3 主板(INTEL P965 东莞产)" ; } publicoverridevoid SetupCpu() { computer.Cpu = "Intel 英特尔酷睿E4400 (2.0GHz/LGA 775/2M/800MHz)盒装"; } publicoverridevoid SetupMemory() { computer.Memory = "G.SKILL 芝奇F2-6400CL5D-2GBNQ DDR2 800 1G*2台式机内存"; } publicoverridevoid SetupHarddisk() { computer.Harddisk = "Hitachi日立SATAII接口台式机硬盘(250G/7200转/8M)盒装"; } publicoverridevoid SetupVideocard() { computer.Videocard = "七彩虹逸彩GT-GD3 UP烈焰战神H10 显卡(GeForce 8600GT/256M/DDR3)支持HDMI!"; } } classComputer { privatestring videocard; publicstring Videocard { get { return videocard; } set { videocard = value; } } privatestring cpu; publicstring Cpu { get { return cpu; } set { cpu = value; } } privatestring mainboard; publicstring Mainboard { get { return mainboard; } set { mainboard = value; } } privatestring memory; publicstring Memory { get { return memory; } set { memory = value; } } privatestring harddisk; publicstring Harddisk { get { return harddisk; } set { harddisk = value; } } publicvoid ShowSystemInfo() { Console.WriteLine("==================SystemInfo=================="); Console.WriteLine("CPU:" + cpu); Console.WriteLine("MainBoard:" + mainboard); Console.WriteLine("Memory:" + memory); Console.WriteLine("VideoCard:" + videocard); Console.WriteLine("HardDisk:" + harddisk); } } }
