C# delegate multicast single delegate（c反应蛋白高说明什么）
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
Action
Action
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 private float currentTemperatureValue; public float CurrentTemperature { get { return currentTemperatureValue; } set { if(value!=currentTemperatureValue) { currentTemperatureValue = value; OnTemperatureChange?.Invoke(value); } } } } }
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