Graphics::DrawArc Method (Pen, RectangleF, Single, Single)
Draws an arc representing a portion of an ellipse specified by a RectangleF structure.
Assembly: System.Drawing (in System.Drawing.dll)
public: void DrawArc( Pen^ pen, RectangleF rect, float startAngle, float sweepAngle )
Parameters
- pen
- Type: System.Drawing::Pen
Pen that determines the color, width, and style of the arc.
- rect
- Type: System.Drawing::RectangleF
RectangleF structure that defines the boundaries of the ellipse.
- startAngle
- Type: System::Single
Angle in degrees measured clockwise from the x-axis to the starting point of the arc.
- sweepAngle
- Type: System::Single
Angle in degrees measured clockwise from the startAngle parameter to ending point of the arc.
| Exception | Condition |
|---|---|
| ArgumentNullException | pen is nullptr |
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.
Defines the start (45 degrees) and sweep (270 degrees) angles.
Draws the elliptical arc to the screen.
The result is a partial ellipse missing a segment between + and - 45 degrees of the x axis.
private: void DrawArcRectangleF( PaintEventArgs^ e ) { // Create pen. Pen^ blackPen = gcnew Pen( Color::Black,3.0f ); // Create rectangle to bound ellipse. RectangleF rect = RectangleF(0.0F,0.0F,100.0F,200.0F); // Create start and sweep angles on ellipse. float startAngle = 45.0F; float sweepAngle = 270.0F; // Draw arc to screen. e->Graphics->DrawArc( 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.