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

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

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

public void DrawPie(
	Pen pen,
	Rectangle rect,
	float startAngle,
	float sweepAngle
)

Parameters

pen
Type: System.Drawing.Pen

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

rect
Type: System.Drawing.Rectangle

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

startAngle
Type: System.Single

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

sweepAngle
Type: System.Single

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

ExceptionCondition
ArgumentNullException

pen is null.

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 PaintEventArgs e, 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 DrawPieRectangle(PaintEventArgs e)
{

    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);

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

    // Create start and sweep angles. 
    float startAngle =  0.0F;
    float sweepAngle = 45.0F;

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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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