Rectangle.IsEmpty Properti

Definisi

Ruang nama:

System.Drawing

Rakitan:

System.Drawing.Primitives.dll

Sumber:

Rectangle.cs

Menguji apakah semua properti numerik ini Rectangle memiliki nilai nol.

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

Nilai Properti

Boolean

Properti ini mengembalikan true jika Widthproperti , Height, X, dan Y dari semua ini Rectangle memiliki nilai nol; jika tidak, false.

Atribut

BrowsableAttribute

Contoh

Contoh kode berikut menunjukkan Intersect, IsEmpty dan IntersectsWith anggota. Contoh ini harus digunakan dengan Formulir Windows. Tempelkan kode ini ke dalam formulir dan panggil metode ini saat menangani peristiwa formulir Paint , meneruskan e sebagai 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