Posted by As you may know, Microsoft is getting into the open source community with the ASP.NET and DNX with the mono project.
The .NET Execution Environment (DNX) is a software development kit which allows you to run .NET applications on Windows, Mac, and Linux using different frameworks such as .NET framework, .NET Core, and Mono. However, everything are not roses. There are many incomplete libraries, incompatibilities, lack of documentation, and most of the examples such as doing SQL or SOAP do not work depending on which the library targets you are planning to code for. Therefore, I decided to test the basics on all the library targets. I am starting with DNX451.
Events seems to be working fine in DNX451 with C#. Below is a code example for those who wish to play with it.
Program.cs
using System;
namespace ConsoleApp1 {
public class Program {
public void Main(string[] args){
Console.WriteLine("Main()");
displayWhichDnxIsCompilingOn();
new EventsExample1.EventsExample();
new EventsExample2.EventsExample2();
new EventsExample3.EventsExample3();
}
private void displayWhichDnxIsCompilingOn(){
#if DNX451
Console.WriteLine("Compiled on DNX451: .NET Framework");
#endif
#if DNXCORE50
Console.WriteLine("Compiled on DNXCORE50: .NET Core 5");
#endif
}
}
}
|
EventsExample1.cs
using System;
namespace EventsExample1 {
public class EventsExample {
public EventsExample(){
Console.WriteLine("\nEventsExample()");
var alarmClock = new AlarmClock();
var alex = new Person("Alex", alarmClock);
alarmClock.AlarmAtSixAM();
Console.WriteLine("-----");
var diego = new Person("Diego", alarmClock);
alarmClock.AlarmAtFivePM();
// Go to EventsExamples2 to continue tutorial
}
}
public class Person {
private string _name;
private AlarmClock _alarmClock;
public Person(string name, AlarmClock alarmClock){
_name = name;
_alarmClock = alarmClock;
//_alarmClock.Alarm += WakeUp
_alarmClock.Alarm += () => { Console.WriteLine("\t{0} is waking up", _name); };
}
//private WakeUp(){
// Console.WriteLine("{0} is waking up", _name);
//}
}
public delegate void AlarmEventHandler();
public class AlarmClock{
public event AlarmEventHandler Alarm;
public void AlarmAtFivePM(){
Alarm();
}
public void AlarmAtSixAM(){
Alarm();
}
}
}
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EventsExample2.cs
using System;
namespace EventsExample2 {
public class EventsExample2 {
public EventsExample2(){
Console.WriteLine("\nEventsExample2()");
var alarmClock = new AlarmClock();
var alex = new PersonToWakeUp("Alex", alarmClock);
alarmClock.AlarmAtSixAM();
Console.WriteLine("-----");
var diego = new PersonToWakeUp("Diego", alarmClock);
alarmClock.AlarmAtFivePM();
// Go to EventsExamples3 to continue tutorial
Console.WriteLine("-----");
}
}
public class PersonToWakeUp {
private string _name;
private AlarmClock _alarmClock;
public PersonToWakeUp(string name, AlarmClock alarmClock){
_name = name;
_alarmClock = alarmClock;
_alarmClock.Alarm += (object sender, EventArgs args) => Console.WriteLine("\t{0} is waking up", _name);
}
}
public delegate void AlarmEventHandler(object send, EventArgs args);
public class AlarmClock{
public event AlarmEventHandler Alarm;
public void AlarmAtFivePM(){
Alarm(this, EventArgs.Empty);
}
public void AlarmAtSixAM(){
Alarm(this, EventArgs.Empty);
}
}
}
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EventsExamples3.cs
using System;
namespace EventsExample3 {
public class EventsExample3 {
public EventsExample3(){
Console.WriteLine("\nEventsExample3()");
var alarmClock = new AlarmClock();
var alex = new PersonToWakeUp("Alejandro", alarmClock);
var vanina = new PersonToWakeUp("Vanina", alarmClock);
alarmClock.AlarmAtSixAM();
alarmClock.AlarmAtFivePM();
}
}
public class PersonToWakeUp {
private string _name;
private AlarmClock _alarmClock;
public PersonToWakeUp(string name, AlarmClock alarmClock){
_name = name;
_alarmClock = alarmClock;
_alarmClock.Alarm += (object sender, AlarmClockEventArgs args) => {
switch (args.Time){
case 6:
Console.WriteLine("\t{0} is waking up and going to work.", _name);
break;
case 17:
Console.WriteLine("\t{0} stop working and going home.", _name);
break;
default:
break;
}
};
}
}
public delegate void AlarmEventHandler(object send, AlarmClockEventArgs args);
public class AlarmClock{
public event AlarmEventHandler Alarm;
public void AlarmAtFivePM(){
Alarm(this, new AlarmClockEventArgs { Time = 17 });
}
public void AlarmAtSixAM(){
Alarm(this, new AlarmClockEventArgs { Time = 6 });
}
}
public class AlarmClockEventArgs : EventArgs{
public int Time{ get; set; }
}
}
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Output:
AGCRM-MacBook-Pro:Examples user$ dnx . me Main() Compiled on DNX451: .NET Framework EventsExample() Alex is waking up ----- Alex is waking up Diego is waking up EventsExample2() Alex is waking up ----- Alex is waking up Diego is waking up ----- EventsExample3() Alejandro is waking up and going to work. Vanina is waking up and going to work. Alejandro stop working and going home. Vanina stop working and going home. |
Cite this article as: Alejandro G. Carlstein Ramos Mejia, "DNX: C#: Events," in Alejandro G. Carlstein Ramos Mejia Blog, September 1, 2015, http://blog.acarlstein.com/?p=3174.
© 2015, Alejandro G. Carlstein Ramos Mejia. All rights reserved.
