PaintEventHandler (Delegado)
Actualización: noviembre 2007
Espacio de nombres: System.Windows.FormsEnsamblado: System.Windows.Forms (en System.Windows.Forms.dll)
/** @delegate */ public delegate void PaintEventHandler( Object sender, PaintEventArgs e )
Parámetros
- sender
- Tipo: System.Object
Origen del evento.
- e
- Tipo: System.Windows.Forms.PaintEventArgs
PaintEventArgs que contiene los datos del evento.
Cuando se crea un delegado PaintEventHandler, se identifica el método que controlará el evento. Para asociar el evento al controlador de eventos, se debe agregar una instancia del delegado al evento. Se llama al controlador de eventos siempre que se produce el evento, a menos que se quite el delegado. Para obtener más información sobre cómo controlar eventos con delegados, vea Eventos y delegados.
El ejemplo de código siguiente dibuja líneas y texto en un control PictureBox.
// This example creates a PictureBox control on the form and draws to it. // This example assumes that the Form_Load event handler method is // connected to the Load event of the form. private PictureBox pictureBox1 = new PictureBox(); private void Form1_Load(object sender, System.EventArgs e) { // Dock the PictureBox to the form and set its background to white. pictureBox1.Dock = DockStyle.Fill; pictureBox1.BackColor = Color.White; // Connect the Paint event of the PictureBox to the event handler method. pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint); // Add the PictureBox control to the Form. this.Controls.Add(pictureBox1); } private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { // Create a local version of the graphics object for the PictureBox. Graphics g = e.Graphics; // Draw a string on the PictureBox. g.DrawString("This is a diagonal line drawn on the control", new Font("Arial",10), System.Drawing.Brushes.Blue, new Point(30,30)); // Draw a line in the PictureBox. g.DrawLine(System.Drawing.Pens.Red, pictureBox1.Left, pictureBox1.Top, pictureBox1.Right, pictureBox1.Bottom); }
// This example creates a PictureBox control on the form and draws to it.
// This example assumes that the Form_Load event handler method is
// connected to the Load event of the form.
private PictureBox pictureBox1 = new PictureBox();
private void Form1_Load(Object sender, System.EventArgs e)
{
// Dock the PictureBox to the form and set its background to white.
pictureBox1.set_Dock(DockStyle.Fill);
pictureBox1.set_BackColor(Color.get_White());
// Connect the Paint event of the PictureBox to the event handler
// method.
pictureBox1.add_Paint(new System.Windows.Forms.PaintEventHandler(this.
pictureBox1_Paint));
// Add the PictureBox control to the Form.
this.get_Controls().Add(pictureBox1);
} //Form1_Load
private void pictureBox1_Paint(Object sender,
System.Windows.Forms.PaintEventArgs e)
{
// Create a local version of the graphics object for the PictureBox.
Graphics g = e.get_Graphics();
// Draw a string on the PictureBox.
g.DrawString("This is a diagonal line drawn on the control",
new Font("Arial", 10), System.Drawing.Brushes.get_Blue(),
(PointF)new PointF(30, 30));
// Draw a line in the PictureBox.
g.DrawLine(System.Drawing.Pens.get_Red(), pictureBox1.get_Left(),
pictureBox1.get_Top(), pictureBox1.get_Right(),
pictureBox1.get_Bottom());
} //pictureBox1_Paint
Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile para Smartphone, Windows Mobile para Pocket PC
.NET Framework y .NET Compact Framework no admiten todas las versiones de cada plataforma. Para obtener una lista de las versiones compatibles, vea Requisitos de sistema de .NET Framework.
