Graphics::DrawPolygon Method (Pen^, array<PointF>^)

 

Draws a polygon defined by an array of PointF structures.

Namespace:   System.Drawing
Assembly:  System.Drawing (in System.Drawing.dll)

public:
void DrawPolygon(
	Pen^ pen,
	array<PointF>^ points
)

Parameters

pen
Type: System.Drawing::Pen^

Pen that determines the color, width, and style of the polygon.

points
Type: array<System.Drawing::PointF>^

Array of PointF structures that represent the vertices of the polygon.

Exception Condition
ArgumentNullException

pen is null.

-or-

points is null.

Every pair of two consecutive points in the array specifies a side of the polygon. In addition, if the last point and the first of the array point do not coincide, they specify the last side of the polygon.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:

  • Creates a black pen.

  • Creates an array of seven points for the vertices of the polygon.

  • Draws the polygon to the screen.

public:
   void DrawPolygonPointF( PaintEventArgs^ e )
   {
      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );

      // Create points that define polygon.
      PointF point1 = PointF(50.0F,50.0F);
      PointF point2 = PointF(100.0F,25.0F);
      PointF point3 = PointF(200.0F,5.0F);
      PointF point4 = PointF(250.0F,50.0F);
      PointF point5 = PointF(300.0F,100.0F);
      PointF point6 = PointF(350.0F,200.0F);
      PointF point7 = PointF(250.0F,250.0F);
      array<PointF>^ curvePoints = {point1,point2,point3,point4,point5,point6,point7};

      // Draw polygon curve to screen.
      e->Graphics->DrawPolygon( blackPen, curvePoints );
   }

.NET Framework
Available since 1.1
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