Control.Show Control.Show Control.Show Control.Show Method

定义

向用户显示控件。Displays the control to the user.

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

示例

下面的代码示例显示关于对话框和暂时其图面上绘制一个蓝色正方形。The following code example displays an about dialog box and temporarily draws a blue square on its surface. 此示例需要您定义了派生的类Form名为AboutDialogThis 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

注解

显示控件等效于设置Visible属性设置为trueShowing the control is equivalent to setting the Visible property to true. 之后Show调用方法时,Visible属性返回的值true直到Hide调用方法。After the Show method is called, the Visible property returns a value of true until the Hide method is called.

适用于

另请参阅