介绍
用原型实例指定创建对象的种类，并且通过拷贝这个原型来创建新的对象。
示例
有一个Message实体类，现在要克隆它。
MessageModel
using System;
using System.Collections.Generic;
using System.Text;
namespace Pattern.Prototype
{
/// <summary>
/// Message实体类
/// </summary>
public class MessageModel
{
/// <summary>
/// 构造函数
/// </summary>
/// <param name="msg">Message内容</param>
/// <param name="pt">Message发布时间</param>
public MessageModel(string msg, DateTime pt)
{
this._message = msg;
this._publishTime = pt;
}
private string _message;
/// <summary>
/// Message内容
/// </summary>
public string Message
{
get { return _message; }
set { _message = value; }
}
private DateTime _publishTime;
/// <summary>
/// Message发布时间
/// </summary>
public DateTime PublishTime
{
get { return _publishTime; }
set { _publishTime = value; }
}
}
}
ShallowCopy
using System;
using System.Collections.Generic;
using System.Text;
namespace Pattern.Prototype
{
/// <summary>
/// 浅拷贝
/// </summary>
public class ShallowCopy : ICloneable
{
/// <summary>
/// 构造函数
/// </summary>
public ShallowCopy()
{
}
/// <summary>
/// 实现ICloneable的Clone()方法
/// </summary>
/// <returns></returns>
public Object Clone()
{
return this.MemberwiseClone();
}
private MessageModel _mm;
/// <summary>
/// Message实体对象
/// </summary>
public MessageModel MessageModel
{
get { return _mm; }
set { _mm = value; }
}
}
}
DeepCopy
using System;
using System.Collections.Generic;
using System.Text;
namespace Pattern.Prototype
{
/// <summary>
/// 深拷贝
/// </summary>
public class DeepCopy : ICloneable
{
/// <summary>
/// 构造函数
/// </summary>
public DeepCopy()
{
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="mm">Message实体对象</param>
public DeepCopy(MessageModel mm)
{
_mm = mm;
}
/// <summary>
/// 实现ICloneable的Clone()方法
/// </summary>
/// <returns></returns>
public Object Clone()
{
return new DeepCopy(new MessageModel(_mm.Message, _mm.PublishTime));
}
private MessageModel _mm;
/// <summary>
/// Message实体对象
/// </summary>
public MessageModel MessageModel
{
get { return _mm; }
set { _mm = value; }
}
}
}
client
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Pattern.Prototype;
public partial class Prototype : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Write("ShallowCopy演示如下：<br />");
ShowShallowCopy();
Response.Write("DeepCopy演示如下：<br />");
ShowDeepCopy();
}
private void ShowShallowCopy()
{
ShallowCopy sc = new ShallowCopy();
sc.MessageModel = new MessageModel("ShallowCopy", DateTime.Now);
ShallowCopy sc2 = (ShallowCopy)sc.Clone();
Response.Write(sc.MessageModel.Message);
Response.Write("<br />");
Response.Write(sc2.MessageModel.Message);
Response.Write("<br />");
sc.MessageModel.Message = "ShallowCopyShallowCopy";
Response.Write(sc.MessageModel.Message);
Response.Write("<br />");
Response.Write(sc2.MessageModel.Message);
Response.Write("<br />");
}
private void ShowDeepCopy()
{
DeepCopy sc = new DeepCopy();
sc.MessageModel = new MessageModel("DeepCopy", DateTime.Now);
DeepCopy sc2 = (DeepCopy)sc.Clone();
Response.Write(sc.MessageModel.Message);
Response.Write("<br />");
Response.Write(sc2.MessageModel.Message);
Response.Write("<br />");
sc.MessageModel.Message = "DeepCopyDeepCopy";
Response.Write(sc.MessageModel.Message);
Response.Write("<br />");
Response.Write(sc2.MessageModel.Message);
Response.Write("<br />");
}
}
运行结果
ShallowCopy演示如下：
ShallowCopy
ShallowCopy
ShallowCopyShallowCopy
ShallowCopyShallowCopy
DeepCopy演示如下：
DeepCopy
DeepCopy
DeepCopyDeepCopy
DeepCopy
用原型实例指定创建对象的种类，并且通过拷贝这个原型来创建新的对象。
示例
有一个Message实体类，现在要克隆它。
MessageModel
using System;using System.Collections.Generic;using System.Text;namespace Pattern.Prototype{ /// <summary> /// Message实体类 /// </summary> public class MessageModel { /// <summary> /// 构造函数 /// </summary> /// <param name="msg">Message内容</param> /// <param name="pt">Message发布时间</param> public MessageModel(string msg, DateTime pt) { this._message = msg; this._publishTime = pt; } private string _message; /// <summary> /// Message内容 /// </summary> public string Message { get { return _message; } set { _message = value; } } private DateTime _publishTime; /// <summary> /// Message发布时间 /// </summary> public DateTime PublishTime { get { return _publishTime; } set { _publishTime = value; } } }}ShallowCopy
using System;using System.Collections.Generic;using System.Text;namespace Pattern.Prototype{ /// <summary> /// 浅拷贝 /// </summary> public class ShallowCopy : ICloneable { /// <summary> /// 构造函数 /// </summary> public ShallowCopy() { } /// <summary> /// 实现ICloneable的Clone()方法 /// </summary> /// <returns></returns> public Object Clone() { return this.MemberwiseClone(); } private MessageModel _mm; /// <summary> /// Message实体对象 /// </summary> public MessageModel MessageModel { get { return _mm; } set { _mm = value; } } }}DeepCopy
using System;using System.Collections.Generic;using System.Text;namespace Pattern.Prototype{ /// <summary> /// 深拷贝 /// </summary> public class DeepCopy : ICloneable { /// <summary> /// 构造函数 /// </summary> public DeepCopy() { } /// <summary> /// 构造函数 /// </summary> /// <param name="mm">Message实体对象</param> public DeepCopy(MessageModel mm) { _mm = mm; } /// <summary> /// 实现ICloneable的Clone()方法 /// </summary> /// <returns></returns> public Object Clone() { return new DeepCopy(new MessageModel(_mm.Message, _mm.PublishTime)); } private MessageModel _mm; /// <summary> /// Message实体对象 /// </summary> public MessageModel MessageModel { get { return _mm; } set { _mm = value; } } }}client
using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using Pattern.Prototype;public partial class Prototype : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { Response.Write("ShallowCopy演示如下：<br />"); ShowShallowCopy(); Response.Write("DeepCopy演示如下：<br />"); ShowDeepCopy(); } private void ShowShallowCopy() { ShallowCopy sc = new ShallowCopy(); sc.MessageModel = new MessageModel("ShallowCopy", DateTime.Now); ShallowCopy sc2 = (ShallowCopy)sc.Clone(); Response.Write(sc.MessageModel.Message); Response.Write("<br />"); Response.Write(sc2.MessageModel.Message); Response.Write("<br />"); sc.MessageModel.Message = "ShallowCopyShallowCopy"; Response.Write(sc.MessageModel.Message); Response.Write("<br />"); Response.Write(sc2.MessageModel.Message); Response.Write("<br />"); } private void ShowDeepCopy() { DeepCopy sc = new DeepCopy(); sc.MessageModel = new MessageModel("DeepCopy", DateTime.Now); DeepCopy sc2 = (DeepCopy)sc.Clone(); Response.Write(sc.MessageModel.Message); Response.Write("<br />"); Response.Write(sc2.MessageModel.Message); Response.Write("<br />"); sc.MessageModel.Message = "DeepCopyDeepCopy"; Response.Write(sc.MessageModel.Message); Response.Write("<br />"); Response.Write(sc2.MessageModel.Message); Response.Write("<br />"); }}运行结果
ShallowCopy演示如下：
ShallowCopy
ShallowCopy
ShallowCopyShallowCopy
ShallowCopyShallowCopy
DeepCopy演示如下：
DeepCopy
DeepCopy
DeepCopyDeepCopy
DeepCopy
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