Form.Closed Evento

Definición

Espacio de nombres:

System.Windows.Forms

Ensamblado:

System.Windows.Forms.dll

Se produce cuando el formulario está cerrado.

public:
 event EventHandler ^ Closed;

[System.ComponentModel.Browsable(false)]
public event EventHandler? Closed;

[<System.ComponentModel.Browsable(false)>]
member this.Closed : EventHandler 

Public Custom Event Closed As EventHandler 

Tipo de evento

EventHandler

Atributos

BrowsableAttribute

Ejemplos

En el ejemplo siguiente se muestra cómo usar los SetDesktopLocationmiembros , Closed, Load, Activatedy Activate . Para ejecutar el ejemplo, pegue el código siguiente en un formulario denominado Form1 que contiene un Button denominado Button1 y dos Label controles denominados Label1 y 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

Precaución

El Closed evento está obsoleto en la versión 2.0 de .NET Framework; use el FormClosed evento en su lugar.

Este evento se produce después de que el usuario haya cerrado el formulario o el Close método del formulario. Para evitar que un formulario se cierre, controle el Closing evento y establezca la Cancel propiedad del objeto pasado al controlador de CancelEventArgs eventos en true.

Puede usar este evento para realizar tareas como liberar recursos usados por el formulario y guardar información escrita en el formulario o para actualizar su formulario primario.

Precaución

Los Form.Closed eventos y Form.Closing no se generan cuando se llama al método para salir de la Application.Exit aplicación. Si tiene código de validación en cualquiera de estos eventos que se deben ejecutar, debe llamar al Form.Close método para cada formulario abierto individualmente antes de llamar al Exit método .

Si el formulario es un formulario primario MDI, los Closing eventos de todos los formularios secundarios MDI se generan antes de que se genere el evento del formulario primario MDI Closing . Además, los Closed eventos de todos los formularios secundarios MDI se generan antes de que se genere el Closed evento del formulario primario MDI.

Para obtener más información sobre el manejo de eventos, consulte controlar y provocar eventos.

Consulte también

• IsMdiContainer
• OnClosed(EventArgs)
• Load