C# constructor event

Question

i created a class and when i create an employee object via form , i want to give a message;

this is my class, event and delegate

public delegate void cto         


        

Answer 1

By the time you subscribe for this event the instance is already constructed. I would recommend using Factory pattern to hide the constructor.

class EmployeeFactory
{
     public Employee Create(int id, string name)
     {
         Employee instance = new Employee(id, name);

         var handler = EmployeeCreated;
         if (handler != null)
         {
              EmployeeEventArgs e = new EmployeeEventArgs(instance);
              handler(e);    
         }

         return instance;
     }

     public event EventHandler  EmployeeCreated;
}

Event subscription:

  factory.EmployeeCreated += MyHandler;

Instance construction:

  var emp = factory.Create(id, name);