comment créer un nouvel arguement pour un eventHandler
Bonjour;
j'ai l'instruction suivante :
Code:
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| link.Click += new EventHandler(Link_Click(22) ;
protected void Link_Click( object sender, EventArgs e,int monParam)
{
//mon code ici
} |
en fait je veux passer un argument supplémentaire quand je clique sur mon lien , mais j'ai eu une erreur que je peux pas le faire ainsi , en cherchant j'ai trouvé la solution suivante sur un autre forum :
Code:
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|
using System;
// FireEventArgs: a custom event inherited from EventArgs.
public class FireEventArgs: EventArgs {
public FireEventArgs(string room, int ferocity) {
this.room = room;
this.ferocity = ferocity;
}
// The fire event will have two pieces of information--
// 1) Where the fire is, and 2) how "ferocious" it is.
public string room;
public int ferocity;
} //end of class FireEventArgs
// Class with a function that creates the eventargs and initiates the event
public class FireAlarm {
// Events are handled with delegates, so we must establish a FireEventHandler
// as a delegate:
public delegate void FireEventHandler(object sender, FireEventArgs fe);
// Now, create a public event "FireEvent" whose type is our FireEventHandler delegate.
public event FireEventHandler FireEvent;
// This will be the starting point of our event-- it will create FireEventArgs,
// and then raise the event, passing FireEventArgs.
public void ActivateFireAlarm(string room, int ferocity) {
FireEventArgs fireArgs = new FireEventArgs(room, ferocity);
// Now, raise the event by invoking the delegate. Pass in
// the object that initated the event (this) as well as FireEventArgs.
// The call must match the signature of FireEventHandler.
FireEvent(this, fireArgs);
}
} // end of class FireAlarm
// Class which handles the event
class FireHandlerClass {
// Create a FireAlarm to handle and raise the fire events.
public FireHandlerClass(FireAlarm fireAlarm) {
// Add a delegate containing the ExtinguishFire function to the class'
// event so that when FireAlarm is raised, it will subsequently execute
// ExtinguishFire.
fireAlarm.FireEvent += new FireAlarm.FireEventHandler(ExtinguishFire);
}
// This is the function to be executed when a fire event is raised.
void ExtinguishFire(object sender, FireEventArgs fe) {
Console.WriteLine("\nThe ExtinguishFire function was called by {0}.", sender.ToString());
// Now, act in response to the event.
if (fe.ferocity < 2)
Console.WriteLine("This fire in the {0} is no problem. I'm going to pour some water on it.", fe.room);
else if (fe.ferocity < 5)
Console.WriteLine("I'm using FireExtinguisher to put out the fire in the {0}.", fe.room);
else
Console.WriteLine("The fire in the {0} is out of control. I'm calling the fire department!", fe.room);
}
} //end of class FireHandlerClass
public class FireEventTest {
public static void Main () {
// Create an instance of the class that will be firing an event.
FireAlarm myFireAlarm = new FireAlarm();
// Create an instance of the class that will be handling the event. Note that
// it receives the class that will fire the event as a parameter.
FireHandlerClass myFireHandler = new FireHandlerClass(myFireAlarm);
//use our class to raise a few events and watch them get handled
myFireAlarm.ActivateFireAlarm("Kitchen", 3);
myFireAlarm.ActivateFireAlarm("Study", 1);
myFireAlarm.ActivateFireAlarm("Porch", 5);
return;
} //end of main
} // end of FireEventTest |
je l'ai implémenté mais malheureusement je ne vois pas comment je pourrai passer la valeur de mon argument supplémentaire, car l'instruction est définie ainsi
Code:
fireAlarm.FireEvent += new FireAlarm.FireEventHandler(ExtinguishFire);
avec "ExtinguishFire" le nom de la fonction à exécuter qui est dans mon cas "Link_Click" comment je mettrai "monParam" à 22 ??
je me perds franchement :calim2:
Merci.
