Design Pattern 16-Facade

最新推荐文章于 2021-01-05 20:59:10 发布

原创最新推荐文章于 2021-01-05 20:59:10 发布 · 1k 阅读

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#string #class #system

博客以CD、磁带机、Mp3三种播音设备为例，阐述了因各自有独立操作方案带来的不便。通过建立统一界面，运用门面模式解决问题，给出了相关代码实现，包括播音设备类和门面类，展示了如何统一操作不同设备。

部署运行你感兴趣的模型镜像

using System;

namespace Pattern
{
/// <summary>
/// Summary description for Class1.
/// </summary>
/*

假设你有三个播音设备.分别使CD 磁带机,Mp3 它们分别有自己独立的操作放案.这让你很头痛

因为你必须掌握三套类似却有相对独立的方案.那么我们考虑如何解决*/

public class CDPlay
{
  private string SongName;
  public CDPlay(string sn)
  {
   SongName=sn;
  }

  public void PlayCd()
  {
   Console.WriteLine("Play Cd" + SongName);
  }

  public void StopCd()
  {
   Console.WriteLine("Stop Cd");
  }

}

public class RecordPlay
{
  private string SongName;
  public RecordPlay(string sn)
  {
   SongName=sn;
  }

  public void PlayRecord()
  {
   Console.WriteLine("Play Record" + SongName);
  }

  public void StopRecord()
  {
   Console.WriteLine("Stop Record");
  }
}

public class Mp3Play
{
  private string SongName;
  public Mp3Play(string sn)
  {
   SongName=sn;
  }

  public void PlayMp3()
  {
   Console.WriteLine("Play Mp3" + SongName);
  }

  public void StopMp3()
  {
   Console.WriteLine("Stop Mp3");
  }
}

//下面我们建立统一的界面

public class Facade
{
  private Mp3Play mp3;
  private RecordPlay rd;
  private CDPlay cd;

  private string playName;
  private string songName;

  public string PlayName
  {
   get{return playName;}
   set{playName=value;}
  }

  public string SongName
  {
   get{return SongName;}
   set{SongName=value;}
  }

  public Facade(string pn,string sn)
  {
   playName=pn;
   songName=sn;
  }

  public void play()
  {
   switch(playName)
   {
    case "CD":
     cd=new CDPlay(songName);
     cd.PlayCd();
     break;
    case "mp3":
     mp3=new Mp3Play(songName);
     mp3.PlayMp3();
     break;
    case "Record":
     rd=new RecordPlay(songName);
     rd.PlayRecord();
     break;
   }
  }

  public void stop()
  {
   switch(playName)
   {
    case "CD":
     cd=new CDPlay(songName);
     cd.StopCd();
     break;
    case "mp3":
     mp3=new Mp3Play(songName);
     mp3.StopMp3();
     break;
    case "Record":
     rd=new RecordPlay(songName);
     rd.StopRecord();
     break;
   }

  }
}

}
   //门面模式
   Facade facade = new Facade("CD","aaaa");
   facade.play();
   facade.stop ();