C#设计模式--装饰模式(Decorator Pattern)
介绍动态地给一个对象添加一些额外的职责。就扩展功能而言，它比生成子类方式更为灵活。
示例
有一个Message实体类，某个对象对它的操作有Insert()和Get()方法，现在扩展这个对象的功能。
http://images.cnblogs.com/cnblogs_com/webabcd/82667/o_Decorator.png
MessageModel
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections.Generic;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Text;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifnamespace Pattern.Decorator
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// Message实体类
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public class MessageModel
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 构造函数
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// <param name="msg">Message内容</param>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <param name="pt">Message发布时间</param>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public MessageModel(string msg, DateTime pt)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif this._message = msg;
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif this._publishTime = pt;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private string _message;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// Message内容
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public string Message
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif get http://www.cnblogs.com/Images/dot.gif{ return _message; }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif set http://www.cnblogs.com/Images/dot.gif{ _message = value; }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private DateTime _publishTime;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// Message发布时间
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public DateTime PublishTime
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif get http://www.cnblogs.com/Images/dot.gif{ return _publishTime; }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif set http://www.cnblogs.com/Images/dot.gif{ _publishTime = value; }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
AbstractMessage
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections.Generic;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Text;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifnamespace Pattern.Decorator
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 操作Message的抽象构件（Component）
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public abstract class AbstractMessage
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 获取Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public abstract List<MessageModel> Get();
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 插入Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// <param name="mm">Message实体对象</param>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public abstract bool Insert(MessageModel mm);
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
SqlMessage
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections.Generic;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Text;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifnamespace Pattern.Decorator
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// Sql方式操作Message（ConcreteComponent）
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public class SqlMessage : AbstractMessage
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 获取Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override List<MessageModel> Get()
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif List<MessageModel> l = new List<MessageModel>();
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif l.Add(new MessageModel("SQL方式获取Message", DateTime.Now));
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return l;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 插入Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// <param name="mm">Message实体对象</param>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override bool Insert(MessageModel mm)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif // 代码略
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return true;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
XmlMessage
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections.Generic;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Text;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifnamespace Pattern.Decorator
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// Xml方式操作Message（ConcreteComponent）
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public class XmlMessage : AbstractMessage
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 获取Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override List<MessageModel> Get()
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif List<MessageModel> l = new List<MessageModel>();
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif l.Add(new MessageModel("XML方式获取Message", DateTime.Now));
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return l;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 插入Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// <param name="mm">Message实体对象</param>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override bool Insert(MessageModel mm)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif // 代码略
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return true;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
AbstractMessageWrapper
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections.Generic;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Text;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifnamespace Pattern.Decorator
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 装饰AbstractMessage（Decorator）
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public abstract class AbstractMessageWrapper : AbstractMessage
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif private AbstractMessage _abstractMessage;
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 构造函数
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <param name="abstractMessage">AbstractMessage</param>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public AbstractMessageWrapper(AbstractMessage abstractMessage)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif this._abstractMessage = abstractMessage;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 获取Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override List<MessageModel> Get()
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return _abstractMessage.Get();
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 插入Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// <param name="mm">Message实体对象</param>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override bool Insert(MessageModel mm)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return _abstractMessage.Insert(mm);
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
CheckUserWrapper
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections.Generic;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Text;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifnamespace Pattern.Decorator
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 扩展出用户验证的功能（ConcreteDecorator）
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public class CheckUserWrapper : AbstractMessageWrapper
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 构造函数
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <param name="abstractMessage">AbstractMessage</param>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public CheckUserWrapper(AbstractMessage abstractMessage)
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif : base(abstractMessage)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 获取Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override List<MessageModel> Get()
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif List<MessageModel> l = base.Get();
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif foreach (MessageModel mm in l)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif mm.Message += "（经过用户验证）";
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return l;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 插入Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// <param name="mm">Message实体对象</param>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override bool Insert(MessageModel mm)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif // 在这里扩展功能
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return base.Insert(mm);
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
CheckInputWrapper
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections.Generic;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Text;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifnamespace Pattern.Decorator
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 扩展出输入验证的功能（ConcreteDecorator）
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public class CheckInputWrapper : AbstractMessageWrapper
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 构造函数
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <param name="abstractMessage">AbstractMessage</param>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public CheckInputWrapper(AbstractMessage abstractMessage)
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif : base(abstractMessage)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 获取Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override List<MessageModel> Get()
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif List<MessageModel> l = base.Get();
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif foreach (MessageModel mm in l)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif mm.Message += "（经过输入验证）";
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return l;
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif /**//// <summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// 插入Message
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// </summary>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif /// <param name="mm">Message实体对象</param>
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif /// <returns></returns>
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif public override bool Insert(MessageModel mm)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif // 在这里扩展功能
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif return base.Insert(mm);
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
Test
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Data;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Configuration;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Collections;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Web;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Web.Security;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Web.UI;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Web.UI.WebControls;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Web.UI.WebControls.WebParts;
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing System.Web.UI.HtmlControls;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifusing Pattern.Decorator;
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
http://www.cnblogs.com/Images/OutliningIndicators/None.gifpublic partial class Decorator : System.Web.UI.Page
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gifhttp://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif protected void Page_Load(object sender, EventArgs e)
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.cnblogs.com/Images/dot.gif{
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif AbstractMessage message = new SqlMessage();
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif AbstractMessageWrapper amr = new CheckUserWrapper(message);
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif Response.Write(amr.Get().Message + " " + amr.Get().PublishTime.ToString());
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif Response.Write("<br />");
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif AbstractMessageWrapper amr2 = new CheckInputWrapper(message);
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif Response.Write(amr2.Get().Message + " " + amr2.Get().PublishTime.ToString());
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif Response.Write("<br />");
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif AbstractMessageWrapper amr3 = new CheckUserWrapper(message);
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif AbstractMessageWrapper amr4 = new CheckInputWrapper(amr3);
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif Response.Write(amr4.Get().Message + " " + amr4.Get().PublishTime.ToString());
http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif Response.Write("<br />");
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.cnblogs.com/Images/OutliningIndicators/None.gif
运行结果
SQL方式获取Message（经过用户验证） 2007-5-13 19:34:01
SQL方式获取Message（经过输入验证） 2007-5-13 19:34:01
SQL方式获取Message（经过用户验证）（经过输入验证） 2007-5-13 19:34:01
参考
http://www.dofactory.com/Patterns/PatternDecorator.aspx
OK
[源码下载]
C#设计模式导航：
C#设计模式--文章索引
C#设计模式--抽象工厂模式(Abstract Factory Pattern)
C#设计模式--原型模式(Prototype Pattern)
C#设计模式--工厂方法模式(Factory Method Pattern)
C#设计模式--单例模式(Singleton Pattern)
C#设计模式--适配器模式(Adapter Pattern)
C#设计模式--桥接模式(Bridge Pattern)
C#设计模式--组合模式(Composite Pattern)
C#设计模式--装饰模式(Decorator Pattern)
C#设计模式--外观模式(Facade Pattern)
C#设计模式--享元模式(Flyweight Pattern)
C#设计模式--代理模式(Proxy Pattern)
C#设计模式--责任链模式(Chain of Responsibility Pattern)
C#设计模式--命令模式(Command Pattern)
C#设计模式--解释器模式(Interpreter Pattern)
C#设计模式--迭代器模式(Iterator Pattern)
C#设计模式--中介者模式(Mediator Pattern)
C#设计模式--备忘录模式(Memento Pattern)
C#设计模式--观察者模式(Observer Pattern)
C#设计模式--状态模式(State Pattern)
C#设计模式--策略模式(Strategy Pattern)
C#设计模式--模板方法模式(Template Method Pattern)
C#设计模式--访问者模式(Visitor Pattern)
C#设计模式--提供者模式(Provider Pattern)
本文摘自：http://www.cnblogs.com/webabcd/archive/2007/05/13/744874.html
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