乐在其中设计模式(C#) - 代理模式(Proxy Pattern)

using System; 
using System.Collections.Generic; 
using System.Text; 
 
namespace Pattern.Proxy 
{ 
         /// <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; } 
                } 
        } 
}

using System; 
using System.Collections.Generic; 
using System.Text; 
 
namespace Pattern.Proxy 
{ 
         /// <summary> 
         /// 对Message操作的接口 
         /// </summary> 
         public  interface IMessage 
        { 
                 /// <summary> 
                 /// 获取Message 
                 /// </summary> 
                 /// <returns></returns> 
                List<MessageModel> Get(); 
 
                 /// <summary> 
                 /// 插入Message 
                 /// </summary> 
                 /// <param name="mm">Message实体对象</param> 
                 /// <returns></returns> 
                 bool Insert(MessageModel mm); 
        } 
}

using System; 
using System.Collections.Generic; 
using System.Text; 
 
namespace Pattern.Proxy 
{ 
         /// <summary> 
         /// Sql方式操作Message 
         /// </summary> 
         public  class SqlMessage : IMessage 
        { 
                 /// <summary> 
                 /// 获取Message 
                 /// </summary> 
                 /// <returns></returns> 
                 public List<MessageModel> Get() 
                { 
                        List<MessageModel> l =  new List<MessageModel>(); 
                        l.Add( new MessageModel( "SQL方式获取Message", DateTime.Now)); 
 
                         return l; 
                } 
 
                 /// <summary> 
                 /// 插入Message 
                 /// </summary> 
                 /// <param name="mm">Message实体对象</param> 
                 /// <returns></returns> 
                 public  bool Insert(MessageModel mm) 
                { 
                         // 代码略 
                         return  true; 
                } 
        } 
}

using System; 
using System.Collections.Generic; 
using System.Text; 
 
namespace Pattern.Proxy 
{ 
         /// <summary> 
         /// 代理类 
         /// </summary> 
         public  class MessageProxy : IMessage 
        { 
                SqlMessage _sqlMessage; 
 
                 /// <summary> 
                 /// 构造函数 
                 /// </summary> 
                 public MessageProxy() 
                { 
                        _sqlMessage =  new SqlMessage(); 
                } 
 
                 /// <summary> 
                 /// 获取Message 
                 /// </summary> 
                 /// <returns></returns> 
                 public List<MessageModel> Get() 
                { 
                         return _sqlMessage.Get(); 
                } 
 
                 /// <summary> 
                 /// 插入Message 
                 /// </summary> 
                 /// <param name="mm">Message实体对象</param> 
                 /// <returns></returns> 
                 public  bool Insert(MessageModel mm) 
                { 
                         return _sqlMessage.Insert(mm); 
                } 
        } 
}

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.Proxy; 
 
public partial  class Proxy : System.Web.UI.Page 
{ 
         protected  void Page_Load( object sender, EventArgs e) 
        { 
                MessageProxy m =  new MessageProxy(); 
                Response.Write(m.Insert( new MessageModel( "插入", DateTime.Now))); 
                Response.Write( "<br />"); 
                Response.Write(m.Get()[0].Message +  " " + m.Get()[0].PublishTime.ToString()); 
        } 
}