Rectangle.IsEmpty Propriedade

Definição

Espaço de Nomes:
System.Drawing
Assemblagem:
System.Drawing.dll
Assemblagem:
netstandard.dll

Testa se todas as propriedades numéricas deste Rectangle têm valores zero.

public:
 property bool IsEmpty { bool get(); };
[System.ComponentModel.Browsable(false)]
public bool IsEmpty { get; }
public bool IsEmpty { get; }
[<System.ComponentModel.Browsable(false)>]
member this.IsEmpty : bool
member this.IsEmpty : bool
Public ReadOnly Property IsEmpty As Boolean

Valor de Propriedade

Boolean

Esta propriedade devolve true se , WidthHeight, X, e Y propriedades deste Rectangle têm todos valores zero; caso contrário, false.

Atributos
BrowsableAttribute

Exemplos

O seguinte exemplo de código demonstra os Intersect, IsEmpty e os IntersectsWith membros. Este exemplo deve ser usado com um Windows Form. Cole este código num formulário e chame este método ao tratar o evento do Paint formulário, passando e como PaintEventArgs.

private:
   void InstanceRectangleIntersection( PaintEventArgs^ e )
   {
      Rectangle rectangle1 = Rectangle(50,50,200,100);
      Rectangle rectangle2 = Rectangle(70,20,100,200);
      e->Graphics->DrawRectangle( Pens::Black, rectangle1 );
      e->Graphics->DrawRectangle( Pens::Red, rectangle2 );
      if ( rectangle1.IntersectsWith( rectangle2 ) )
      {
         rectangle1.Intersect( rectangle2 );
         if (  !rectangle1.IsEmpty )
         {
            e->Graphics->FillRectangle( Brushes::Green, rectangle1 );
         }
      }
   }

private void InstanceRectangleIntersection(PaintEventArgs e)
{

    Rectangle rectangle1 = new Rectangle(50, 50, 200, 100);
    Rectangle rectangle2 = new Rectangle(70, 20, 100, 200);

    e.Graphics.DrawRectangle(Pens.Black, rectangle1);
    e.Graphics.DrawRectangle(Pens.Red, rectangle2);

    if (rectangle1.IntersectsWith(rectangle2))
    {
        rectangle1.Intersect(rectangle2);
        if (!rectangle1.IsEmpty)
        {
            e.Graphics.FillRectangle(Brushes.Green, rectangle1);
        }
    }
}

  Private Sub InstanceRectangleIntersection( _
      ByVal e As PaintEventArgs)

      Dim rectangle1 As New Rectangle(50, 50, 200, 100)
      Dim rectangle2 As New Rectangle(70, 20, 100, 200)

      e.Graphics.DrawRectangle(Pens.Black, rectangle1)
      e.Graphics.DrawRectangle(Pens.Red, rectangle2)

      If (rectangle1.IntersectsWith(rectangle2)) Then
          rectangle1.Intersect(rectangle2)
          If Not (rectangle1.IsEmpty) Then
              e.Graphics.FillRectangle(Brushes.Green, rectangle1)
          End If
      End If
  End Sub

Aplica-se a