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Graphics.DrawPie Method (Pen, RectangleF, Single, Single)

Draws a pie shape defined by an ellipse specified by a RectangleF structure and two radial lines.

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

public void DrawPie (
	Pen pen,
	RectangleF rect,
	float startAngle,
	float sweepAngle
)
public void DrawPie (
	Pen pen, 
	RectangleF rect, 
	float startAngle, 
	float sweepAngle
)
public function DrawPie (
	pen : Pen, 
	rect : RectangleF, 
	startAngle : float, 
	sweepAngle : float
)
Not applicable.

Parameters

pen

Pen that determines the color, width, and style of the pie shape.

rect

RectangleF structure that represents the bounding rectangle that defines the ellipse from which the pie shape comes.

startAngle

Angle measured in degrees clockwise from the x-axis to the first side of the pie shape.

sweepAngle

Angle measured in degrees clockwise from the startAngle parameter to the second side of the pie shape.

Exception typeCondition

ArgumentNullException

pen is a null reference (Nothing in Visual Basic).

This method draws a pie shape defined by an arc of an ellipse and the two radial lines that intersect with the endpoints of the arc. The ellipse is defined by the bounding rectangle. The pie shape consists of the two radial lines defined by the startAngle and sweepAngle parameters, and the arc between the intersections of those radial lines with the ellipse.

If the sweepAngle parameter is greater than 360 degrees or less than -360 degrees, it is treated as if it were 360 degrees or -360 degrees, respectively.

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 a rectangle that bounds a complete ellipse.

  • Defines the angles at which to start drawing (relative to the x axis) and through which to draw (both in a clockwise direction).

  • Draws the pie segment to the screen.

public void DrawPieRectangleF(PaintEventArgs e)
{
             
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
             
    // Create rectangle for ellipse.
    RectangleF rect = new RectangleF(0.0F, 0.0F, 200.0F, 100.0F);
             
    // Create start and sweep angles.
    float startAngle =  0.0F;
    float sweepAngle = 45.0F;
             
    // Draw pie to screen.
    e.Graphics.DrawPie(blackPen, rect, startAngle, sweepAngle);
}

public void DrawPieRectangleF(PaintEventArgs e) 
{
    // Create pen.
    Pen blackPen =  new Pen(Color.get_Black(), 3);

    // Create rectangle for ellipse.
    RectangleF rect =  new RectangleF(0, 0, 200, 100);

    // Create start and sweep angles.
    float startAngle = 0;
    float sweepAngle = 45;

    // Draw pie to screen.
    e.get_Graphics().DrawPie(blackPen, rect, startAngle, sweepAngle);
} //DrawPieRectangleF

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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