Form.Activated Form.Activated Form.Activated Form.Activated Event

Definición

Se produce cuando el formulario se activa por código de programa o por parte del usuario.Occurs when the form is activated in code or by the user.

public:
 event EventHandler ^ Activated;
public event EventHandler Activated;
member this.Activated : EventHandler 
Public Custom Event Activated As EventHandler 

Ejemplos

En el ejemplo siguiente se muestra cómo usar SetDesktopLocationlos Closedmiembros Load, Activated,, Activate y.The following example demonstrates how to use the SetDesktopLocation, Closed, Load, Activated, and Activate members. Para ejecutar el ejemplo, pegue el código siguiente en un formulario denominado Form1 que contenga Button1 un Button denominado Label y dos Label1 controles Label2denominados y.To run the example, paste the following code in a form called Form1 containing a Button called Button1 and two Label controls called Label1 and Label2.

static int x = 200;
static int y = 200;
void Button1_Click( System::Object^ sender, System::EventArgs^ e )
{
   
   // Create a new Form1 and set its Visible property to true.
   Form1^ form2 = gcnew Form1;
   form2->Visible = true;
   
   // Set the new form's desktop location so it  
   // appears below and to the right of the current form.
   form2->SetDesktopLocation( x, y );
   x += 30;
   y += 30;
   
   // Keep the current form active by calling the Activate
   // method.
   this->Activate();
   this->Button1->Enabled = false;
}


// Updates the label text to reflect the current values of x 
// and y, which was were incremented in the Button1 control's 
// click event.
void Form1_Activated( Object^ sender, System::EventArgs^ e )
{
   Label1->Text = String::Format( "x: {0} y: {1}", x, y );
   Label2->Text = String::Format( "Number of forms currently open: {0}", count );
}

static int count = 0;
void Form1_Closed( Object^ sender, System::EventArgs^ e )
{
   count -= 1;
}

void Form1_Load( Object^ sender, System::EventArgs^ e )
{
   count += 1;
}
static int x = 200;
static int y = 200;

private void Button1_Click(System.Object sender, 
	System.EventArgs e)
{
	// Create a new Form1 and set its Visible property to true.
	Form1 form2 = new Form1();
	form2.Visible = true;

	// Set the new form's desktop location so it  
	// appears below and to the right of the current form.
	form2.SetDesktopLocation(x, y);
	x += 30;
	y += 30;

	// Keep the current form active by calling the Activate
	// method.
	this.Activate();
	this.Button1.Enabled = false;
}



// Updates the label text to reflect the current values of x 
// and y, which was were incremented in the Button1 control's 
// click event.
private void Form1_Activated(object sender, System.EventArgs e)
{
	Label1.Text = "x: "+x+" y: "+y;
	Label2.Text = "Number of forms currently open: "+count;
}

static int count = 0;

private void Form1_Closed(object sender, System.EventArgs e)
{
	count -= 1;
}

private void Form1_Load(object sender, System.EventArgs e)
{
	count += 1;
}
Shared x As Integer = 200
Shared y As Integer = 200

Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click

    ' Create a new Form1 and set its Visible property to true.
    Dim form2 As New Form1
    form2.Visible = True

    ' Set the new form's desktop location so it appears below and 
    ' to the right of the current form.
    form2.SetDesktopLocation(x, y)
    x += 30
    y += 30

    ' Keep the current form active by calling the Activate method.
    Me.Activate()
    Me.Button1.Enabled = False
End Sub



' Updates the label text to reflect the current values of x and y, 
' which was were incremented in the Button1 control's click event.
Private Sub Form1_Activated(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Activated
    Label1.Text = "x: " & x & " y: " & y
    Label2.Text = "Number of forms currently open: " & count
End Sub

Shared count As Integer = 0

Private Sub Form1_Closed(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Closed
    count -= 1
End Sub

Private Sub Form1_Load(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Load
    count += 1
End Sub

Comentarios

Nota

Cuando la aplicación está activa y tiene varios formularios, el formulario activo es el formulario con el foco de entrada.When the application is active and has multiple forms, the active form is the form with the input focus. Un formulario que no está visible no puede ser el formulario activo.A form that is not visible cannot be the active form. La manera más sencilla de activar un formulario visible es hacer clic en él o usar una combinación de teclado adecuada.The simplest way to activate a visible form is to click it or use an appropriate keyboard combination.

Para activar un formulario en tiempo de ejecución mediante código, llame Activate al método.To activate a form at run time using code, call the Activate method. Puede usar este evento para tareas como actualizar el contenido del formulario en función de los cambios realizados en los datos del formulario cuando el formulario no se activó.You can use this event for tasks such as updating the contents of the form based on changes made to the form's data when the form was not activated.

Para obtener más información sobre el manejo de eventos, consulte controlar y provocar eventos.For more information about handling events, see Handling and Raising Events.

Se aplica a

Consulte también: