How to create Event program in C#

Welcome to the C# tutorial. In this tutorial will see How to create Event program in C#.

1. Defining the event : For defining the event you first need to declare a delegate

Step a.

public delegate void TimeToRise();

Here , TimeToRise is the name of the delegate.

Step b. Declare the event.

public event TimeToRise RingAlarm;

Here, RingAlarm is the name of the event.

2. Subscribing to the event.

Any class object can be the subscriber to the event.

Here Student class is the subscriber.

Student pd=new Student();
//event Handler
public void wakeup(){}
RingAlarm = new TimeToRise(pd.wakeup);

Complete Demo is Here:

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplication1 { //Publisher Class class Event1 { //step 1 declare the delegate public delegate void TimeToRise(); //declare a event variable using delegate public event TimeToRise RingAlarm; //create the method to raise the event public void onRingAlaram() { if (RingAlarm != null) RingAlarm(); } } //Subsciber class class EventDemo2 { //create a method to handle the event static void WakeUp() { Console.WriteLine("Wake Up............."); } public static void Main() { Event1 obj = new Event1(); // Publisher class object obj.RingAlarm += WakeUp; // register the event with event handler obj.onRingAlaram();//raise an event Console.ReadLine(); } } }

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