Graphics.DrawArc Method (Pen, Single, Single, Single, Single, Single, Single)
Draws an arc representing a portion of an ellipse specified by a pair of coordinates, a width, and a height.
Assembly: System.Drawing (in System.Drawing.dll)
public void DrawArc( Pen pen, float x, float y, float width, float height, float startAngle, float sweepAngle )
Parameters
- pen
-
Type:
System.Drawing.Pen
Pen that determines the color, width, and style of the arc.
- x
-
Type:
System.Single
The x-coordinate of the upper-left corner of the rectangle that defines the ellipse.
- y
-
Type:
System.Single
The y-coordinate of the upper-left corner of the rectangle that defines the ellipse.
- width
-
Type:
System.Single
Width of the rectangle that defines the ellipse.
- height
-
Type:
System.Single
Height of the rectangle that defines 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 null. |
This method draws an arc that is a portion of the perimeter of an ellipse. The ellipse is defined by the boundaries of a rectangle. The arc is the portion of the perimeter of the ellipse between the startAngle parameter and the startAngle + sweepAngle parameters.
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 the position and size of 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 DrawArcFloat(PaintEventArgs e) { // Create pen. Pen blackPen= new Pen(Color.Black, 3); // Create coordinates of rectangle to bound ellipse. float x = 0.0F; float y = 0.0F; float width = 100.0F; float height = 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, x, y, width, height, startAngle, sweepAngle); }
Available since 1.1