C#设计模式：职责链模式（Chain of Responsibility）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace _20.职责链模式
{
/// <summary>
/// 职责链模式是一种行为模式，为解除请求的发送者和接收者之间的耦合，而使多个对象都有机会处理这个请求。
/// 将这些对象连接成一条链，并沿着这条链传递该请求，直到有一个对象处理它。
/// </summary>
class Program
{
static void Main(string[] args)
{
People people = AuditorManager.GetAuditor();
people.HandleRequest("中国人");
people.HandleRequest("美国人");
}
}
/// <summary>
/// 管理审核者
/// </summary>
public class AuditorManager
{
private static People AuditorPeople = null; /// <summary>
/// 初始化数据
/// </summary>
static AuditorManager()
{
Chinses chinses = new Chinses();
Usa usa = new Usa();
chinses.SetNext(usa);
usa.SetNext(chinses);
AuditorPeople = chinses;
}
public static People GetAuditor()
{
return AuditorPeople;
}
}
/// <summary>
/// 抽象审核者
/// </summary>
public abstract class People
{
public People _people { get; private set; } public void SetNext(People people)
{
this._people = people;
}
public string Name { get; set; }
/// <summary>
/// 定义一个处理请求的接口
/// </summary>
/// <param name="request"></param>
public abstract void HandleRequest(string request);
}
/// <summary>
/// 具体审核者
/// </summary>
public class Chinses : People
{
/// <summary>
/// 处理其所负责的请求
/// </summary>
/// <param name="request"></param>
public override void HandleRequest(string request)
{
if (request == "中国人")
{
Console.WriteLine("中国人执行任务");
}
else
{
base._people.HandleRequest(request);
}
}
}
/// <summary>
/// 具体审核者
/// </summary>
public class Usa : People
{
/// <summary>
/// 处理其所负责的请求
/// </summary>
/// <param name="request"></param>
public override void HandleRequest(string request)
{
if (request == "美国人")
{
Console.WriteLine("美国人执行任务");
}
else
{
_people.HandleRequest(request);
}
}
}
}