Demo for Event code

 

Using System;
Using System. Collections. Generic;
Using System. Linq;
Using System. Text;

Namespace EventDemo
{
Delegate void TemperatureChangedEventHandle (object sender, BoiledWaterEventArgs args );
Class Program
{
Static void Main (string [] args)
{
Heater ht = new Heater ();
Monitor mt = new Monitor ();
Ht. TemperatureChanged + = new TemperatureChangedEventHandle (Monitor. MonitorTemperature );
Ht. PowerOn ();
}
}
Class Heater
{
Public Heater ()
{
Type = "strong and fast ";
Area = "Made in China, Made by Trump ";
}
Private int _ temperature;
Public event TemperatureChangedEventHandle TemperatureChanged;
Public string Type
{
Get;
Private set;
}
Public string Area
{
Get;
Private set;
}
Public bool IsOnPower
{
Get;
Private set;
}
Public void PowerOff ()
{
IsOnPower = false;
String s = new string ('*', 50 );
Console. WriteLine ("My power supply is unplugged, now the temperature starts to drop, Type: {0}, Area: {1}", Type, Area );
Console. WriteLine (s );
System. Threading. Thread. Sleep (500 );
While (_ temperature> 0)
{
_ Temperature --;
System. Threading. Thread. Sleep (500 );
TemperatureChanged (this, new BoiledWaterEventArgs {Temperature = _ temperature, Type = this. Type, Area = this. Area });
}
}
Public void PowerOn ()
{
IsOnPower = true;
String s = new string ('*', 50 );
Console. WriteLine ("I started to boil my information, Type: {0}, Area: {1}", Type, Area );
System. Threading. Thread. Sleep (500 );
Console. WriteLine (s );
BoilWater ();
}
Private void BoilWater ()
{
While (IsOnPower & _ temperature <100)
{
_ Temperature ++;
System. Threading. Thread. Sleep (200 );
TemperatureChanged (this, new BoiledWaterEventArgs {Temperature = _ temperature, Type = this. Type, Area = this. Area });
}
}
}
Class Monitor
{
Public static void MonitorTemperature (object sender, BoiledWaterEventArgs args)
{
Heater ht = sender as Heater;
Int temperature = args. Temperature;
If (null = ht)
{
Console. WriteLine ("This is not a pitfall, sender is not a water heater", temperature );
Return;
}
If (temperature <30)
{
Console. WriteLine ("the water temperature is too low... goose bumps, temperature: {0}", temperature );
If (! Ht. IsOnPower)
{
Ht. PowerOn ();
}
}
Else if (temperature> = 30 & temperature <50)
{
Console. WriteLine ("water temperature is good, very good, temperature: {0}", temperature );
}
Else if (temperature >=50 & temperature <70)
{
Console. WriteLine ("a bit hot, tolerable, right when the sauna, temperature: {0}", temperature );
}
Else if (temperature> = 70)
{
Console. WriteLine ("You want to burn your brother, turn off the power supply, temperature: {0}", temperature );
If (ht. IsOnPower)
{
Ht. PowerOff ();
}
}
}
}
Class BoiledWaterEventArgs: EventArgs
{
Public int Temperature
{
Get;
Set;
}
Public string Type
{
Get;
Set;
}
Public string Area
{
Get;
Set;
}
}
}