C#中Observer观察者形式处理牛顿童鞋结果题目的实例【C#.Net教程】,Observer,csharp,.net

这篇文章重要引见了C#设想情势之Observer观察者情势处理牛顿童鞋效果题目,简朴报告了观察者情势的道理并连系细致实例情势剖析了运用观察者情势处理牛顿童鞋效果题目的细致步骤相干操纵技能,并附带demo源码供读者下载参考,须要的朋侪能够参考下

本文实例报告了C#设想情势之Observer观察者情势处理牛顿童鞋效果题目。分享给人人供人人参考，细致以下：

一.理论定义

观察者情势形貌了一种一对多的关联。当某一对象的状况发作转变时，其他对象会获得转变的关照。并作出响应的回响反映。

二.运用举例

需求形貌：牛顿同砚的期末考试效果(Score)出来了，各科先生都想晓得本身的门生效果状况！
语文先生(TeacherChinese)只体贴牛顿的语文(Chinese)效果.
英语先生(TeacherEnglish)只体贴牛顿的英语(English)效果.
数学先生(TeacherMathematics)只体贴牛顿的数学(Mathematics)效果.
班主任想体贴(TeacherTeacherHead) 牛顿的各科效果和总效果(TotalScore).
效果出来后，各科先生都获得关照(Notify).

三.细致编码

1.增加门生信息类，内里只要一个Name属性。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.Observer
{
 /// <summary>
 /// 门生信息类
 /// </summary>
 public class Student
 {
  /// <summary>
  /// 姓名
  /// </summary>
  public string Name { get; set; }
 }
}

2.效果单(Score)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.Observer
{
 public delegate void NotifyEventHandler(Score score);
 public class Score
 {
  public Score() { }
  //事宜声明
  public NotifyEventHandler NotifyEvent=null;
  /// <summary>
  /// 挪用进口
  /// </summary>
  public void Notify() {
   OnNotifyChange();
  }
  /// <summary>
  ///关照事宜
  /// </summary>
  private void OnNotifyChange() {
   if (NotifyEvent != null) {
    NotifyEvent(this);
   }
  }
  /// <summary>
  /// 数学效果
  /// </summary>
  public float Mathematics { get; set; }
  /// <summary>
  /// 英语效果
  /// </summary>
  public float English { get; set; }
  /// <summary>
  /// 语文效果
  /// </summary>
  public float Chinese { get; set; }
  /// <summary>
  /// 三科总效果
  /// </summary>
  public float TotalScore {
   get {
    return Mathematics+English+Chinese;
   }
  }
  /// <summary>
  /// 门生基本信息
  /// </summary>
  public Student student { get; set; }
 }
}

3.语文先生

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.Observer
{
 /// <summary>
 /// 语文先生
 /// </summary>
 public class TeacherChinese
 {
  public void Receive(Score score) {
   Console.WriteLine("我是语文先生，我只体贴"+score.student.Name+"的语文效果:"+score.Chinese+"分");
  }
 }
}

4.英语先生

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.Observer
{
 /// <summary>
 /// 英语先生
 /// </summary>
 public class TeacherEnglish
 {
  public void Receive(Score score) {
   Console.WriteLine("我是英语先生，我只体贴" + score.student.Name + "的英语效果:" + score.English + "分");
  }
 }
}

5.数学先生

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.Observer
{
 /// <summary>
 /// 数学先生
 /// </summary>
 public class TeacherMathematics
 {
  public void Receive(Score score) {
   Console.WriteLine("我是数学先生，我只体贴" + score.student.Name + "的数学效果:" + score.Mathematics + "分");
  }
 }
}

6.班主任

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Com.Design.Gof.Observer
{
 /// <summary>
 /// 班主任
 /// </summary>
 public class TeacherTeacherHead
 {
  public void Receive(Score score) {
   string name=score.student.Name;
   Console.WriteLine("我是班主任，我要体贴 " + name + " 的各科效果和总效果");
   Console.WriteLine(name + "的 语文 效果: " + score.Chinese + " 分");
   Console.WriteLine(name + "的 英语 效果: " + score.English + " 分");
   Console.WriteLine(name + "的 数学 效果: " + score.Mathematics + " 分");
   Console.WriteLine(name + "的 总 效果: " + score.TotalScore + " 分");
  }
 }
}

7.下面是主函数挪用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Com.Design.Gof.Observer;
namespace Com.Design.Gof.Test
{
 class Program
 {
  static void Main(string[] args)
  {
   #region Observer
   /*牛顿同砚的效果单*/
   Score score = new Score {
    Chinese = 60,
    Mathematics = 100,
    English = 90,
    student = new Student { Name = "牛顿" }
   };
   TeacherChinese teacherChinese = new TeacherChinese(); //语文先生
   TeacherEnglish teacherEnglish = new TeacherEnglish();//英语先生
   TeacherMathematics teacherMathematics = new TeacherMathematics();//数学先生
   TeacherTeacherHead teacherTeacherHead = new TeacherTeacherHead();//班主任
   //牛顿效果单出来了，先生都想晓得这个效果。
   score.NotifyEvent += new NotifyEventHandler(teacherChinese.Receive);
   score.NotifyEvent += new NotifyEventHandler(teacherEnglish.Receive);
   score.NotifyEvent += new NotifyEventHandler(teacherMathematics.Receive);
   score.NotifyEvent += new NotifyEventHandler(teacherTeacherHead.Receive);
   //向 各 学科 先生发送 有针对性的，感兴趣的 效果
   score.Notify();
   #endregion
   Console.ReadKey();
  }
 }
}

8.运转效果