HtmlElementEventHandler Delegado

Definición

Representa el método que controlará los eventos Click, MouseDown y los eventos relacionados en HtmlDocument, HtmlElement y HtmlWindow.Represents the method that will handle the Click, MouseDown and related events on HtmlDocument, HtmlElement, and HtmlWindow.

public delegate void HtmlElementEventHandler(System::Object ^ sender, HtmlElementEventArgs ^ e);
public delegate void HtmlElementEventHandler(object sender, HtmlElementEventArgs e);
type HtmlElementEventHandler = delegate of obj * HtmlElementEventArgs -> unit
Public Delegate Sub HtmlElementEventHandler(sender As Object, e As HtmlElementEventArgs)

Parámetros

sender
Object

Origen del evento.The source of the event.

e
HtmlElementEventArgs

Objeto HtmlElementEventArgs que contiene los datos del evento.An HtmlElementEventArgs that contains the event data.

Ejemplos

En el código siguiente se adjuntan controladores de eventos para los MouseDown MouseMove eventos, y MouseUp en HtmlDocument .The following code attaches event handlers for the MouseDown, MouseMove, and MouseUp events on HtmlDocument. En este ejemplo de código se supone que el proyecto tiene una instancia del WebBrowser control denominado WebBrowser1 .This code sample assumes your project has an instance of the WebBrowser control named WebBrowser1.

private:
   void webBrowser1_DocumentCompleted( Object^ /*sender*/, System::Windows::Forms::WebBrowserDocumentCompletedEventArgs^ /*e*/ )
   {
      WebBrowser1->Document->MouseDown += gcnew HtmlElementEventHandler( this, &Form1::Document_MouseDown );
      WebBrowser1->Document->MouseMove += gcnew HtmlElementEventHandler( this, &Form1::Document_MouseMove );
      WebBrowser1->Document->MouseUp += gcnew HtmlElementEventHandler( this, &Form1::Document_MouseUp );
   }

   void Document_MouseDown( Object^ /*sender*/, HtmlElementEventArgs^ /*e*/ )
   {
      // Insert your code here.
   }

   void Document_MouseMove( Object^ /*sender*/, HtmlElementEventArgs^ /*e*/ )
   {
      // Insert your code here.
   }

   void Document_MouseUp( Object^ /*sender*/, HtmlElementEventArgs^ /*e*/ )
   {
      // Insert your code here.
   }
private void webBrowser1_DocumentCompleted(object sender, System.Windows.Forms.WebBrowserDocumentCompletedEventArgs e)
{
    WebBrowser1.Document.MouseDown += new HtmlElementEventHandler(Document_MouseDown);
    WebBrowser1.Document.MouseMove += new HtmlElementEventHandler(Document_MouseMove);
    WebBrowser1.Document.MouseUp += new HtmlElementEventHandler(Document_MouseUp);
}

private void Document_MouseDown(object sender, HtmlElementEventArgs e)
{
    // Insert your code here.
}

private void Document_MouseMove(object sender, HtmlElementEventArgs e)
{
    // Insert your code here.
}

private void Document_MouseUp(object sender, HtmlElementEventArgs e)
{
    // Insert your code here.
}
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
    Dim Doc As HtmlDocument = WebBrowser1.Document

    AddHandler Doc.MouseDown, New HtmlElementEventHandler(AddressOf Document_MouseDown)
    AddHandler Doc.MouseMove, New HtmlElementEventHandler(AddressOf Document_MouseMove)
    AddHandler Doc.MouseUp, New HtmlElementEventHandler(AddressOf Document_MouseUp)
End Sub

Private Sub Document_MouseDown(ByVal sender As Object, ByVal e As HtmlElementEventArgs)
    ' Insert your code here.
End Sub

Private Sub Document_MouseMove(ByVal sender As Object, ByVal e As HtmlElementEventArgs)
    ' Insert your code here.
End Sub

Private Sub Document_MouseUp(ByVal sender As Object, ByVal e As HtmlElementEventArgs)
    ' Insert your code here.
End Sub

Comentarios

Cuando se crea un delegado HtmlElementEventHandler, se identifica el método que controlará el evento.When you create a HtmlElementEventHandler delegate, you identify the method that will handle the event. Para asociar el evento al controlador, se debe agregar una instancia del delegado al evento.To associate the event with your event handler, add an instance of the delegate to the event. Siempre que se produce el evento, se llama a su controlador, a menos que se quite el delegado.The event handler is called whenever the event occurs, unless you remove the delegate. Para obtener más información sobre los delegados de controladores de eventos, vea controlar y provocar eventos.For more information about event handler delegates, see Handling and Raising Events.

Debe esperar hasta que haya finalizado la carga de un documento HTML para adjuntar un controlador de eventos al documento.You must wait until an HTML document has finished loading in order to attach an event handler to the document. Si intenta adjuntar un controlador antes de que se complete la carga, se puede producir un error en la operación de adjuntar.If you attempt to attach a handler before loading has completed, the attach operation may fail. El mejor lugar para adjuntar controladores de eventos en un nuevo documento se encuentra en el DocumentCompleted controlador de eventos del WebBrowser control.The best place to attach event handlers in a new document is in the DocumentCompleted event handler for the WebBrowser control.

Métodos de extensión

GetMethodInfo(Delegate)

Obtiene un objeto que representa el método representado por el delegado especificado.Gets an object that represents the method represented by the specified delegate.

Se aplica a