设计模式之原型模式
2018-06-22 07:40:59来源：未知 阅读 ()
1、类图
实例类图
2、创建项目
……………………………………
3、 新建周报类WeeklyLog：充当原型角色，Clone()方法为克隆方法，用于实现原型对象的克隆，Attachmentch充当成员类。
Attachmentch代码如下：
using System;
namespace PrototypeSample
{
[Serializable]
class Attachment
{
private string name;
public string Name
{
get { return name; }
set { name = value; }
}
public void Download()
{
Console.WriteLine("下载附件，文件名为{0}。",name);
}
}
}
4、WeeklyLog类代码如下：
using System;
using System.IO;
using System.Collections;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;
namespace PrototypeSample
{
[Serializable]
class WeeklyLog
{
private Attachment attachment;
private string name;
private string date;
private string content;
public Attachment Attachment
{
get { return attachment; }
set { attachment = value; }
}
public string Name
{
get { return name; }
set { name = value; }
}
public string Date
{
get { return date; }
set { date = value; }
}
public string Content
{
get { return content; }
set { content = value; }
}
/*
//使用MemberwiseClone()方法实现浅克隆
public WeeklyLog Clone()
{
return this.MemberwiseClone() as WeeklyLog;
}
*/
//使用序列化方式实现深克隆
public WeeklyLog Clone()
{
WeeklyLog clone = null;
//序列化
FileStream fs = new FileStream("Temp.dat", FileMode.Create);
BinaryFormatter formatter = new BinaryFormatter();
try
{
//对当前对象执行序列化操作到Temp.dat
formatter.Serialize(fs, this);
}
catch (SerializationException e)
{
Console.WriteLine("Failed to serialize. Reason: " + e.Message);
throw;
}
finally
{
fs.Close();
}
//反序列化
FileStream fs1 = new FileStream("Temp.dat", FileMode.Open);
BinaryFormatter formatter1 = new BinaryFormatter();
try
{
//从流中反序列化到对象
clone = (WeeklyLog)formatter1.Deserialize(fs1);
}
catch (SerializationException e)
{
Console.WriteLine("Failed to deserialize. Reason: " + e.Message);
throw;
}
finally
{
fs.Close();
}
return clone;
}
}
}
5、 客户端测试类Program:
using System;
namespace PrototypeSample
{
class Program
{
static void Main(string[] args)
{
/*
ConcretePrototypeB prototype, copy;
prototype = new ConcretePrototypeB();
//prototype.Attr = "Sunny";
copy = (ConcretePrototypeB)prototype.Clone();
//copy.Attr = "Tom";
Console.WriteLine(prototype == copy);
//Console.WriteLine(prototype.GetType() == copy.GetType());
Console.WriteLine(prototype.Member == copy.Member);
Console.Read();
*/
WeeklyLog log_previous, log_new;
log_previous = new WeeklyLog();
Attachment attachment = new Attachment();
log_previous.Attachment = attachment;
log_new = log_previous.Clone();
Console.WriteLine("周报是否相同？{0}",(log_previous == log_new)?"是":"否");
Console.WriteLine("附件是否相同？{0}",(log_previous.Attachment == log_new.Attachment)?"是":"否");
Console.Read();
}
}
}
6、 编译及运行程序，输出如下结果：
7、 深克隆解决方案：
1） 将周报类WeeklyLog和附件类Attachment标记为可序列化(Serializable)
[Serializable]
class WeeklyLog
{
private Attachment attachment;
……
}
[Serializable]
class Attachment
{
……
}
//使用序列化方式实现深克隆
public WeeklyLog Clone()
{
WeeklyLog clone = null;
FileStream fs = new FileStream("Temp.dat", FileMode.Create);
BinaryFormatter formatter = new BinaryFormatter();
try
{
formatter.Serialize(fs, this); //序列化
}
catch (SerializationException e)
{
Console.WriteLine("Failed to serialize. Reason: " + e.Message);
throw;
}
finally
{
fs.Close();
}
FileStream fs1 = new FileStream("Temp.dat", FileMode.Open);
BinaryFormatter formatter1 = new BinaryFormatter();
try
{
clone = (WeeklyLog)formatter1.Deserialize(fs1); //反序列化
}
catch (SerializationException e)
{
Console.WriteLine("Failed to deserialize. Reason: " + e.Message);
throw;
}
finally
{
fs1.Close();
}
return clone;
}
标签：
版权申明：本站文章部分自网络，如有侵权，请联系：west999com@outlook.com
特别注意：本站所有转载文章言论不代表本站观点，本站所提供的摄影照片，插画，设计作品，如需使用，请与原作者联系，版权归原作者所有
上一篇：AJAX基础
下一篇：ajax实现跨域请求
- .NET建造者模式讲解 2020-02-27
- 详解asp.net mvc CodeFirst模式数据库迁移步骤 2019-12-14
- 分享基于EF6、Unitwork、Autofac的Repository模式设计 2019-07-23
- RabbitMQ-Direct模式 2019-05-17
- asp.net—单例模式 2018-12-11
IDC资讯： 主机资讯 注册资讯 托管资讯 vps资讯 网站建设
网站运营： 建站经验 策划盈利 搜索优化 网站推广 免费资源
网络编程： Asp.Net编程 Asp编程 Php编程 Xml编程 Access Mssql Mysql 其它
服务器技术： Web服务器 Ftp服务器 Mail服务器 Dns服务器 安全防护
软件技巧： 其它软件 Word Excel Powerpoint Ghost Vista QQ空间 QQ FlashGet 迅雷
网页制作： FrontPages Dreamweaver Javascript css photoshop fireworks Flash
