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Graphics.DrawEllipse Method (Pen, RectangleF)

Draws an ellipse defined by a bounding RectangleF.

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

public void DrawEllipse(
	Pen pen,
	RectangleF rect
)

Parameters

pen
Type: System.Drawing.Pen
Pen that determines the color, width, and style of the ellipse.
rect
Type: System.Drawing.RectangleF
RectangleF structure that defines the boundaries of the ellipse.

ExceptionCondition
ArgumentNullException

pen is null.

This method draws an ellipse that is defined by the bounding rectangle specified by the rect parameter.

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 to bound an ellipse.

  • Draws the ellipse to the screen.


private void DrawEllipseRectangleF(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);

    // Draw ellipse to screen.
    e.Graphics.DrawEllipse(blackPen, rect);
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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