Rectangle.IsEmpty Rectangle.IsEmpty Rectangle.IsEmpty Rectangle.IsEmpty Property

Definition

Tests whether all numeric properties of this Rectangle have values of zero.

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

Property Value

This property returns true if the Width, Height, X, and Y properties of this Rectangle all have values of zero; otherwise, false.

Examples

The following code example demonstrates the Intersect, IsEmpty and the IntersectsWith members. This example should be used with a Windows Form. Paste this code into a form and call this method when handling the form's Paint event, passing e as 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

Applies to