WPF Attach Event definition

Routed events are hosted by interface elements that have visual entities, while attached events do not have the ability to display them on the user interface. Two method naming conventions for adding and removing attachment events:

1. The wrapper for adding an additional event listener for the target UI element is aAdd*handlerThe public static method. The asterisk represents the event name, which is the same as the name when registering the event.

2. The wrapper that relieves the UI element from listening on the attached event is the public static method named Remove*handler , and the asterisk is the event name.

The code is as follows:

public class student{Public    int ID {get; set;}    public string Name {get; set;}    public static readonly RoutedEvent namechangedevent = eventmanager.registerroutedevent ("namechanged",         Routingstrategy.bubble,        typeof (Routedeventhandler),        typeof (Student));    public static void Addnamechangedhandler (DependencyObject D, Routedeventhandler h)    {        UIElement element = d as UIE lement;        if (element! = null) element. AddHandler (Student.namechangedevent, h);    }    public static void Removenamechangedhandler (DependencyObject D, Routedeventhandler h)    {        UIElement element = d as UIElement;        if (element! = null) element. RemoveHandler (Student.namechangedevent, h);    }}

WPF Attach Event definition