Event definitions for C # class objects

1. Class object code

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingsystem.timers;namespacewinformeventtest{/// <summary>    ///an object class that defines a showstring event/// </summary>    Internal classEventClass {/// <summary>          ///declaring a delegate/// </summary>          /// <param name= "a" >parameters passed by the delegate</param>           Public Delegate void Broadcasteventhander(stringa); /// <summary>        ///declaring delegate-related events/// </summary>         Public Event Broadcasteventhander broadcast; /// <summary>        ///declaring Timers/// </summary>        PrivateTimer _timer; /// <summary>        ///         /// </summary>         PublicEventClass () {_timer=NewTimer ( +); _timer. Elapsed+=NewElapsedeventhandler (timer_elapsed); _timer. Enabled=true; }        /// <summary>        ///internal timer events for simulating event generation/// </summary>        /// <param name= "Sender" ></param>        /// <param name= "E" ></param>        voidTimer_elapsed (Objectsender, Elapsedeventargs e) {            Try{Broadcast ("message from the EventClass object event:"+ DateTime.Now.ToString ());//Generate Events            }            Catch(Exception) {} }}}

2.Winform Invocation Example

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;namespacewinformeventtest{ Public Partial classForm1:form {//declaring VariablesEventClass _eventclass; /// <summary>          ///Console Print String/// </summary>          /// <param name= "a" ></param>           Public voidConsoleshowtxt (stringa) {Console.WriteLine (DateTime.Now.ToString ()+" | "+ A +"\ n"); }                 PublicForm1 () {InitializeComponent (); //Member Initialize_eventclass =NewEventClass (); //Member Event Initialize_eventclass.broadcast + =NewEventClass.Broadcasteventhander(Consoleshowtxt);//Delegate class event (broadcast) binding actual processing method (Consoleshowtxt)        }    }}

Event definitions for C # class objects