Graphics.DrawArc Method

Definition

Namespace:

System.Drawing

Assembly:

System.Drawing.Common.dll

Draws an arc representing a portion of an ellipse specified by a pair of coordinates, a width, and a height.

Overloads

DrawArc(Pen, Rectangle, Single, Single)	Draws an arc representing a portion of an ellipse specified by a Rectangle structure.
DrawArc(Pen, RectangleF, Single, Single)	Draws an arc representing a portion of an ellipse specified by a RectangleF structure.
DrawArc(Pen, Int32, Int32, Int32, Int32, Int32, Int32)	Draws an arc representing a portion of an ellipse specified by a pair of coordinates, a width, and a height.
DrawArc(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.

DrawArc(Pen, Rectangle, Single, Single)

Draws an arc representing a portion of an ellipse specified by a Rectangle structure.

public:
 void DrawArc(System::Drawing::Pen ^ pen, System::Drawing::Rectangle rect, float startAngle, float sweepAngle);

public void DrawArc (System.Drawing.Pen pen, System.Drawing.Rectangle rect, float startAngle, float sweepAngle);

member this.DrawArc : System.Drawing.Pen * System.Drawing.Rectangle * single * single -> unit

Public Sub DrawArc (pen As Pen, rect As Rectangle, startAngle As Single, sweepAngle As Single)

Parameters

pen

Pen

Pen that determines the color, width, and style of the arc.

rect

Rectangle

RectangleF structure that defines the boundaries of the ellipse.

startAngle

Single

Angle in degrees measured clockwise from the x-axis to the starting point of the arc.

sweepAngle

Single

Angle in degrees measured clockwise from the startAngle parameter to ending point of the arc.

Exceptions

ArgumentNullException

pen is null.

Examples

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 DrawArcRectangle( PaintEventArgs^ e )
   {
      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );

      // Create rectangle to bound ellipse.
      Rectangle rect = Rectangle(0,0,100,200);

      // 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 );
   }

private void DrawArcRectangle(PaintEventArgs e)
{
   // Create pen.
    Pen blackPen= new Pen(Color.Black, 3);
             
    // Create rectangle to bound ellipse.
    Rectangle rect = new Rectangle(0, 0, 100, 200);
             
    // 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);
}

Private Sub DrawArcRectangle(ByVal e As PaintEventArgs)

    ' Create pen.
    Dim blackPen As New Pen(Color.Black, 3)

    ' Create rectangle to bound ellipse.
    Dim rect As New Rectangle(0, 0, 100, 200)

    ' Create start and sweep angles on ellipse.
    Dim startAngle As Single = 45.0F
    Dim sweepAngle As Single = 270.0F

    ' Draw arc to screen.
    e.Graphics.DrawArc(blackPen, rect, startAngle, sweepAngle)
End Sub

Remarks

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.

DrawArc(Pen, RectangleF, Single, Single)

Draws an arc representing a portion of an ellipse specified by a RectangleF structure.

public:
 void DrawArc(System::Drawing::Pen ^ pen, System::Drawing::RectangleF rect, float startAngle, float sweepAngle);

public void DrawArc (System.Drawing.Pen pen, System.Drawing.RectangleF rect, float startAngle, float sweepAngle);

member this.DrawArc : System.Drawing.Pen * System.Drawing.RectangleF * single * single -> unit

Public Sub DrawArc (pen As Pen, rect As RectangleF, startAngle As Single, sweepAngle As Single)

Parameters

pen

Pen

Pen that determines the color, width, and style of the arc.

rect

RectangleF

RectangleF structure that defines the boundaries of the ellipse.

startAngle

Single

Angle in degrees measured clockwise from the x-axis to the starting point of the arc.

sweepAngle

Single

Angle in degrees measured clockwise from the startAngle parameter to ending point of the arc.

Exceptions

ArgumentNullException

pen is null

Examples

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 );
   }

private void DrawArcRectangleF(PaintEventArgs e)
{
    // Create pen.
    Pen blackPen= new Pen(Color.Black, 3);
             
    // Create rectangle to bound ellipse.
    RectangleF rect = new 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);
}

Private Sub DrawArcRectangleF(ByVal e As PaintEventArgs)

    ' Create pen.
    Dim blackPen As New Pen(Color.Black, 3)

    ' Create rectangle to bound ellipse.
    Dim rect As New RectangleF(0.0F, 0.0F, 100.0F, 200.0F)

    ' Create start and sweep angles on ellipse.
    Dim startAngle As Single = 45.0F
    Dim sweepAngle As Single = 270.0F

    ' Draw arc to screen.
    e.Graphics.DrawArc(blackPen, rect, startAngle, sweepAngle)
End Sub

Remarks

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.

DrawArc(Pen, Int32, Int32, Int32, Int32, Int32, Int32)

Draws an arc representing a portion of an ellipse specified by a pair of coordinates, a width, and a height.

public:
 void DrawArc(System::Drawing::Pen ^ pen, int x, int y, int width, int height, int startAngle, int sweepAngle);

public void DrawArc (System.Drawing.Pen pen, int x, int y, int width, int height, int startAngle, int sweepAngle);

member this.DrawArc : System.Drawing.Pen * int * int * int * int * int * int -> unit

Public Sub DrawArc (pen As Pen, x As Integer, y As Integer, width As Integer, height As Integer, startAngle As Integer, sweepAngle As Integer)

Parameters

pen

Pen

Pen that determines the color, width, and style of the arc.

x

Int32

The x-coordinate of the upper-left corner of the rectangle that defines the ellipse.

y

Int32

The y-coordinate of the upper-left corner of the rectangle that defines the ellipse.

width

Int32

Width of the rectangle that defines the ellipse.

height

Int32

Height of the rectangle that defines the ellipse.

startAngle

Int32

Angle in degrees measured clockwise from the x-axis to the starting point of the arc.

sweepAngle

Int32

Angle in degrees measured clockwise from the startAngle parameter to ending point of the arc.

Exceptions

ArgumentNullException

pen is null.

Examples

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 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 DrawArcInt( PaintEventArgs^ e )
   {
      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );
      // Create coordinates of rectangle to bound ellipse.
      int x = 0;
      int y = 0;
      int width = 100;
      int height = 200;

      // Create start and sweep angles on ellipse.
      int startAngle = 45;
      int sweepAngle = 270;

      // Draw arc to screen.
      e->Graphics->DrawArc( blackPen, x, y, width, height, startAngle, sweepAngle );
   }

private void DrawArcInt(PaintEventArgs e)
{
    // Create pen.
    Pen blackPen= new Pen(Color.Black, 3);
             
    // Create coordinates of rectangle to bound ellipse.
    int x = 0;
    int y = 0;
    int width = 100;
    int height = 200;
             
    // Create start and sweep angles on ellipse.
    int startAngle =  45;
    int sweepAngle = 270;
             
    // Draw arc to screen.
    e.Graphics.DrawArc(blackPen, x, y, width, height, startAngle, sweepAngle);
}

Private Sub DrawArcInt(ByVal e As PaintEventArgs)

    ' Create pen.
    Dim blackPen As New Pen(Color.Black, 3)

    ' Create coordinates of rectangle to bound ellipse.
    Dim x As Integer = 0
    Dim y As Integer = 0
    Dim width As Integer = 100
    Dim height As Integer = 200

    ' Create start and sweep angles on ellipse.
    Dim startAngle As Integer = 45
    Dim sweepAngle As Integer = 270

    ' Draw arc to screen.
    e.Graphics.DrawArc(blackPen, x, y, width, height, startAngle, _
    sweepAngle)
End Sub

Remarks

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.

DrawArc(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.

public:
 void DrawArc(System::Drawing::Pen ^ pen, float x, float y, float width, float height, float startAngle, float sweepAngle);

public void DrawArc (System.Drawing.Pen pen, float x, float y, float width, float height, float startAngle, float sweepAngle);

member this.DrawArc : System.Drawing.Pen * single * single * single * single * single * single -> unit

Public Sub DrawArc (pen As Pen, x As Single, y As Single, width As Single, height As Single, startAngle As Single, sweepAngle As Single)

Parameters

pen

Pen

Pen that determines the color, width, and style of the arc.

x

Single

The x-coordinate of the upper-left corner of the rectangle that defines the ellipse.

y

Single

The y-coordinate of the upper-left corner of the rectangle that defines the ellipse.

width

Single

Width of the rectangle that defines the ellipse.

height

Single

Height of the rectangle that defines the ellipse.

startAngle

Single

Angle in degrees measured clockwise from the x-axis to the starting point of the arc.

sweepAngle

Single

Angle in degrees measured clockwise from the startAngle parameter to ending point of the arc.

Exceptions

ArgumentNullException

pen is null.

Examples

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 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 = gcnew Pen( Color::Black,3.0f );

      // 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 );
   }

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);
}

Private Sub DrawArcFloat(ByVal e As PaintEventArgs)

    ' Create pen.
    Dim blackPen As New Pen(Color.Black, 3)

    ' Create coordinates of rectangle to bound ellipse.
    Dim x As Single = 0.0F
    Dim y As Single = 0.0F
    Dim width As Single = 100.0F
    Dim height As Single = 200.0F

    ' Create start and sweep angles on ellipse.
    Dim startAngle As Single = 45.0F
    Dim sweepAngle As Single = 270.0F

    ' Draw arc to screen.
    e.Graphics.DrawArc(blackPen, x, y, width, height, startAngle, _
    sweepAngle)
End Sub

Remarks

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.