这篇文章主要为大家详细介绍了C#设计模式之行为型模式的相关资料，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

这里列举行为型模式·到此23种就列完了···这里是看着菜鸟教程来实现··，他里边列了25种，其中过滤器模式和空对象模式应该不属于所谓的23种模式

责任链模式：为请求创建一个接收者对象的链，对请求的发送者和接收者进行解耦，大部分用于web中吧。。
Task中的continuewith和微软的tpl数据流应该是类似这种模式的实现吧


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//责任链模式
namespace ExercisePrj.Dsignmode
{
  public abstract class AbstractLogger
  {
    public static int INFO = 1;
    public static int DEBUG = 2;
    public static int ERROR = 3;
    protected int level;
    //责任链中的下一个对象
    protected AbstractLogger nextLogger;
    public void SetNextLogger(AbstractLogger next)
    {
      nextLogger = next;
    }
    public void LogMessage(int level,string message)
    {
      if(this.level<=level)
      {
        Write(message);
      }
      if(nextLogger!=null)
      {
        nextLogger.LogMessage(level, message);
      }
    }
    protected abstract void Write(string message);
  }
  public class ConsoleLogger : AbstractLogger
  {

    public ConsoleLogger(int level)
    {
      this.level = level;
    }

    protected override void Write(string message)
    {
      Console.WriteLine("Standard Console::Logger: " + message);
    }
  }
  public class ErrorLogger : AbstractLogger
  {

    public ErrorLogger(int level)
    {
      this.level = level;
    }

    protected override void Write(String message)
    {
      Console.WriteLine("Error Console::Logger: " + message);
    }
  }
  public class FileLogger : AbstractLogger
  {
    public FileLogger(int level)
    {
      this.level = level;
    }

    protected override void Write(String message)
    {
      Console.WriteLine("File::Logger: " + message);
    }
  }
}

命令模式（Command Pattern）:请求以命令的形式执行，CAD的的命令应该就是以这种方式执行的·二次开发的时候通过特性标识和继承他的接口来添加命令，非常方便


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//命令模式
namespace ExercisePrj.Dsignmode
{
  public interface IOrder
  {
    void Execute();
  }
  public class Stock
  {
    private string name = "ABC";
    private int quantity = 10;

    public void Buy()
    {
      Console.WriteLine("Stock name:{0},quantity:{1},bought",name,quantity);
    }
    public void Sell()
    {
      Console.WriteLine("Stock name:{0},quantity:{1}sold", name, quantity);
    }
  }
  //请求类
  public class BuyStock : IOrder
  {
    private Stock abcStock;

    public BuyStock(Stock abcStock)
    {
      this.abcStock = abcStock;
    }

    public void Execute()
    {
      abcStock.Buy();
    }
  }
  //继承接口的实体
  public class SellStock : IOrder
  {
    private Stock abcStock;

    public SellStock(Stock abcStock)
    {
      this.abcStock = abcStock;
    }

    public void Execute()
    {
      abcStock.Sell();
    }
  }

  //命令调用类
  public class Broker
  {
    private List<IOrder> orderList = new List<IOrder>();

    public void takeOrder(IOrder order)
    {
      orderList.Add(order);
    }

    public void placeOrders()
    {
      foreach (IOrder order in orderList)
      {
        order.Execute();
      }
      orderList.Clear();
    }
  }

}

解释器模式：就是实现一种表达式接口，C#的各种表达式就是这种实现吧··这玩意跟富文本编辑器一样是个大坑吧··，做好了确实很好使，一不小心就得跪


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//解释器模式
namespace ExercisePrj.Dsignmode
{
  public interface Expression
  {
     bool Interpret(string context);
  }
  public class TerminalExpression : Expression
  {
    private string data;

    public TerminalExpression(string data)
    {
      this.data = data;
    }

    public bool Interpret(string context)
    {
      if (context.Contains(data))
      {
        return true;
      }
      return false;
    }
  }
  public class OrExpression : Expression
  {
    private Expression expr1 = null;
    private Expression expr2 = null;
    public OrExpression(Expression expr1, Expression expr2)
    {
      this.expr1 = expr1;
      this.expr2 = expr2;
    }
    public bool Interpret(String context)
    {
      return expr1.Interpret(context) || expr2.Interpret(context);
    }
  }
  public class AndExpression : Expression
  {
    private Expression expr1 = null;
    private Expression expr2 = null;

    public AndExpression(Expression expr1, Expression expr2)
    {
      this.expr1 = expr1;
      this.expr2 = expr2;
    }
    public bool Interpret(String context)
    {
      return expr1.Interpret(context) && expr2.Interpret(context);
    }
    }
}

迭代器模式（Iterator Pattern）：.NET自带接口···，直接实现就行了··注意又泛型接口和非泛型接口··非泛型接口迭代对象返回的是object，泛型接口返回的直接就是对象了，还有通过yield的简化写法不用额外去实现IEnumerator接口


using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ExercisePrj.Dsignmode
{
  public class IteratorEx : IEnumerable //<IteratorEx>
  {
    public string Name;
    private List<IteratorEx> list = new List<IteratorEx>();

    //public IEnumerator<IteratorEx> GetEnumerator()
    //{
    //  foreach (var l in list)
    //  {
    //    yield return l;
    //  }
    /