design mode (C #)

Returns the design mode (C #) series Article index

Introduced

captures the internal state of an object without damaging the encapsulation, and saves the state outside the object. This allows the object to be restored to its saved state later.

Example

There is a message entity class, an object has an insert () method for its operation, which succeeds only if the insertion time meets the requirements, so the state of the message object can be saved and restored, the state of the message object restored after the insert fails, and then only the time is updated. Insert again.

Messagemodel

using System;
using System.Collections.Generic;
using System.Text;

Namespace Pattern.memento
{
/**////<summary>
///Message entity class (Memento)
///</summary> ; 　　　　
public class Messagemodel
{
/**////<summary>
///constructor
///</summary>
　　　　<param name= "msg" >message content </param>
///<param name= "PT" >message release time </param>
　　　　　　Public Messagemodel (String msg, DateTime PT)
{
This._message = msg;
This._publishtime = pt; 　　　　
}

private string _message;
　　　　　　/**////<summary>
///message content
///</summary>
public string text
{
get {return _message;}
Set {_message = value;} 　　　　
}

Private DateTime _publishtime;
/**////<SUMMARY>
///message publish time
///</summary>
Public DateTime Publishtime
　　　　{
Get {return _publishtime;}
Set {_publishtime = value;}
}
}
}