Control.Show Metodo

Definizione

Rende visibile il controllo all'utente.Displays the control to the user.

public:
 void Show();
public void Show ();
member this.Show : unit -> unit
Public Sub Show ()

Esempi

Nell'esempio di codice seguente viene visualizzata una finestra di dialogo informazioni su e viene disegnato temporaneamente un quadrato blu sulla relativa superficie.The following code example displays an about dialog box and temporarily draws a blue square on its surface. Questo esempio richiede che sia stata definita una classe che deriva da Form denominata AboutDialog.This example requires that you have defined a class that derives from Form named AboutDialog.

private:
   void menuItemHelpAbout_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      // Create and display a modeless about dialog box.
      AboutDialog^ about = gcnew AboutDialog;
      about->Show();
      
      // Draw a blue square on the form.
      /* NOTE: This is not a persistent object, it will no longer be
                  * visible after the next call to OnPaint. To make it persistent,
                  * override the OnPaint method and draw the square there */
      Graphics^ g = about->CreateGraphics();
      g->FillRectangle( Brushes::Blue, 10, 10, 50, 50 );
   }
private void menuItemHelpAbout_Click(object sender, EventArgs e)
{
   // Create and display a modless about dialog box.
   AboutDialog about = new AboutDialog();
   about.Show();

   // Draw a blue square on the form.
   /* NOTE: This is not a persistent object, it will no longer be
      * visible after the next call to OnPaint. To make it persistent, 
      * override the OnPaint method and draw the square there */
   Graphics g = about.CreateGraphics();
   g.FillRectangle(Brushes.Blue, 10, 10, 50, 50);
}
Private Sub menuItemHelpAbout_Click(sender As Object, _
  e As EventArgs) Handles menuItemHelpAbout.Click
   ' Create and display a modless about dialog box.
   Dim about As New AboutDialog()
   about.Show()
   
   ' Draw a blue square on the form.
   ' NOTE: This is not a persistent object, it will no longer be
   ' visible after the next call to OnPaint. To make it persistent, 
   ' override the OnPaint method and draw the square there 
   Dim g As Graphics = about.CreateGraphics()
   g.FillRectangle(Brushes.Blue, 10, 10, 50, 50)
End Sub

Commenti

La visualizzazione del controllo equivale a impostare la proprietà Visible su true.Showing the control is equivalent to setting the Visible property to true. Dopo la chiamata del metodo Show, la proprietà Visible restituisce un valore di true fino a quando non viene chiamato il metodo Hide.After the Show method is called, the Visible property returns a value of true until the Hide method is called.

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