Rectangle.IsEmpty Propriedade

Definição

Namespace:

System.Drawing

Assembly:

System.Drawing.Primitives.dll

Origem:

Rectangle.cs

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

public:
 property bool IsEmpty { bool get(); };

[System.ComponentModel.Browsable(false)]
public bool IsEmpty { get; }

[<System.ComponentModel.Browsable(false)>]
member this.IsEmpty : bool

Public ReadOnly Property IsEmpty As Boolean

Valor da propriedade

Boolean

Essa propriedade retornará true se as Widthpropriedades , Height, Xe Y de tudo isso Rectangle tiverem valores de zero; caso contrário, false.

Atributos

BrowsableAttribute

Exemplos

O exemplo de código a seguir demonstra os IntersectIsEmpty membros e IntersectsWith . Este exemplo deve ser usado com um Windows Form. Cole esse código em um formulário e chame esse método ao manipular 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