Detailed EventHandler in C #

This article introduces the EventHandler in C # through case examples, and the friends you need refer to it.

Needless to say, the detailed details are as follows:

Here defines a water tank class public class water tank {  //This is the water tank's discharge operation public  Void Discharge () {}  //This is the property of the water tank public  double volume;  This is the water tank empty event public event  EventHandler tank empty; This defines a water refill class public class water refill {public  void plus water (Object sender, EventArgs e)  {    //Add water to the water tank that needs to be added  }} public Class user{public  User ()  {    //instantiate tank type    water tank 1 = new water tank ();    Example of water-adding device    1 = new water-adding device ();    Water Refill register Tank empty event    water tank 1. Water tank Empty + = new EventHandler (water refill 1. Add water);  }  Private water-adding water device 1;  Private tank water tank 1;}

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The most classic explanation for C # delegates:

Example:

This. Activated + = new EventHandler (form1_activated);

This is the principle of a delegate.

This. Activated= you have finished your meal;  Form1_activated= shout Me a voice

The meaning of this sentence is to put these two things together, meaning that you eat the meal after the call me. I entrust you to finish dinner, shout me. So I don't have to take a moment to see if you have finished eating, have entrusted you.

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