Rectangle.Union(Rectangle, Rectangle) 方法

定義

取得 Rectangle 結構,該結構包含兩個 Rectangle 結構的聯集。Gets a Rectangle structure that contains the union of two Rectangle structures.

public:
 static System::Drawing::Rectangle Union(System::Drawing::Rectangle a, System::Drawing::Rectangle b);
public static System.Drawing.Rectangle Union (System.Drawing.Rectangle a, System.Drawing.Rectangle b);
static member Union : System.Drawing.Rectangle * System.Drawing.Rectangle -> System.Drawing.Rectangle
Public Shared Function Union (a As Rectangle, b As Rectangle) As Rectangle

參數

a
Rectangle

要聯集的矩形。A rectangle to union.

b
Rectangle

要聯集的矩形。A rectangle to union.

傳回

Rectangle

Rectangle 結構,限定兩個 Rectangle 結構的聯集下限。A Rectangle structure that bounds the union of the two Rectangle structures.

範例

下列程式碼範例會示範如何使用 Union 方法。The following code example demonstrates how to use the Union method. 此範例是專為搭配 Windows Form 使用所設計。This example is designed for use with a Windows Form. 將此程式碼貼入表單,並 ShowRectangleUnion 在處理表單的事件時呼叫方法 Paint ,傳遞 ePaintEventArgsPaste this code into a form and call the ShowRectangleUnion method when handling the form's Paint event, passing e as PaintEventArgs.

private:
   void ShowRectangleUnion( PaintEventArgs^ e )
   {
      // Declare two rectangles and draw them.
      Rectangle rectangle1 = Rectangle(30,40,50,100);
      Rectangle rectangle2 = Rectangle(50,60,100,60);
      e->Graphics->DrawRectangle( Pens::Sienna, rectangle1 );
      e->Graphics->DrawRectangle( Pens::BlueViolet, rectangle2 );

      // Declare a third rectangle as a union of the first two.
      Rectangle rectangle3 = Rectangle::Union( rectangle1, rectangle2 );

      // Fill in the third rectangle in a semi-transparent color.
      Color transparentColor = Color::FromArgb( 40, 135, 135, 255 );
      e->Graphics->FillRectangle( gcnew SolidBrush( transparentColor ), rectangle3 );
   }
private void ShowRectangleUnion(PaintEventArgs e)
{

    // Declare two rectangles and draw them.
    Rectangle rectangle1 = new Rectangle(30, 40, 50, 100);
    Rectangle rectangle2 = new Rectangle(50, 60, 100, 60);
    e.Graphics.DrawRectangle(Pens.Sienna, rectangle1);
    e.Graphics.DrawRectangle(Pens.BlueViolet, rectangle2);

    // Declare a third rectangle as a union of the first two.
    Rectangle rectangle3 = Rectangle.Union(rectangle1, rectangle2);

    // Fill in the third rectangle in a semi-transparent color.
    Color transparentColor = Color.FromArgb(40, 135, 135, 255);
    e.Graphics.FillRectangle(new SolidBrush(transparentColor), rectangle3);
}
Private Sub ShowRectangleUnion(ByVal e As PaintEventArgs)

    ' Declare two rectangles and draw them.
    Dim rectangle1 As New Rectangle(30, 40, 50, 100)
    Dim rectangle2 As New Rectangle(50, 60, 100, 60)
    e.Graphics.DrawRectangle(Pens.Sienna, rectangle1)
    e.Graphics.DrawRectangle(Pens.BlueViolet, rectangle2)

    ' Declare a third rectangle as a union of the first two.
    Dim rectangle3 As Rectangle = Rectangle.Union(rectangle1, _
        rectangle2)

    ' Fill in the third rectangle in a semi-transparent color.
    Dim transparentColor As Color = Color.FromArgb(40, 135, 135, 255)
    e.Graphics.FillRectangle(New SolidBrush(transparentColor), _
        rectangle3)
End Sub

備註

當兩個矩形的其中一個是空的,表示其所有值都是零,方法會傳回 Union 一個矩形,其起點為 (0、0) ,以及非空白矩形的高度和寬度。When one of the two rectangles is empty, meaning all of its values are zero, the Union method returns a rectangle with a starting point of (0, 0), and the height and width of the non-empty rectangle. 例如,如果您有兩個矩形: A = (0,0;0、0) 和 B = (1,1;2,2) ,A 和 B 的聯集是 (0,0;2,2) 。For example, if you have two rectangles: A = (0, 0; 0, 0) and B = (1, 1; 2, 2), then the union of A and B is (0, 0; 2, 2).

適用於