C# delegate multicast single delegate（曹海涛）

C# delegate multicast single delegate（曹海涛）

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApp386

{

class Program

{

static void Main(string[] args)

{

Thermostat thermostat = new Thermostat();

Heater heater = new Heater(60);

Cooler cooler = new Cooler(80);

Action del1;

Action del2;

Action del3;

del1 = heater.OnTemperatureChanged;

del2 = cooler.OnTemperatureChanged;

Console.WriteLine("Invoke both delegates:");

del3 = del1;

del3 += del2;

del3(90);

Console.WriteLine("Multicast delegates:");

foreach(var dl in del3.GetInvocationList())

{

Console.WriteLine($"Target:{dl.Target},Method:{dl.Method}");

}

Console.WriteLine();

Console.WriteLine("Invoke only del2:");

del3 -= del1;

del3(30);

Console.WriteLine("\nSingle delegate:");

foreach (var dl in del3.GetInvocationList())

{

Console.WriteLine($"Target:{dl.Target},Method:{dl.Method}");

}

Console.ReadLine();

}

}

class Cooler

{

public float Temperature

{

get;set;

}

public Cooler(float temperature)

{

Temperature = temperature;

}

public void OnTemperatureChanged(float newTemperature)

{

if(newTemperature>Temperature)

{

Console.WriteLine("Cooloer:On");

}

else

{

Console.WriteLine("Cooler:Off");

}

}

}

class Heater

{

public float Temperature

{

get;set;

}

public Heater(float temperature)

{

Temperature = temperature;

}

public void OnTemperatureChanged(float newTemperature)

{

if(newTemperature

{

Console.WriteLine("Heater:On");

}

else

{

Console.WriteLine("Heater:Off");

}

}

}

public class Thermostat

{

//Define the event publisher

public Action OnTemperatureChange { get; set; }

private float currentTemperatureValue;

public float CurrentTemperature

{

get

{

return currentTemperatureValue;

}

set

{

if(value!=currentTemperatureValue)

{

currentTemperatureValue = value;

OnTemperatureChange?.Invoke(value);

}

}

}

}

}

{

Console.WriteLine("Heater:On");

}

else

{

Console.WriteLine("Heater:Off");

}

}

}

public class Thermostat

{

//Define the event publisher

public Action OnTemperatureChange { get; set; }

private float currentTemperatureValue;

public float CurrentTemperature

{

get

{

return currentTemperatureValue;

}

set

{

if(value!=currentTemperatureValue)

{

currentTemperatureValue = value;

OnTemperatureChange?.Invoke(value);

}

}

}

}

}

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