Graphics.DrawArc 方法  
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
绘制一个弧线,表示由一对坐标、宽度和高度指定的椭圆部分。
重载
| DrawArc(Pen, Rectangle, Single, Single) | 绘制一个弧线,表示由 Rectangle 结构指定的椭圆部分。 | 
| DrawArc(Pen, RectangleF, Single, Single) | 绘制一个弧线,表示由 RectangleF 结构指定的椭圆部分。 | 
| DrawArc(Pen, Int32, Int32, Int32, Int32, Int32, Int32) | 绘制一个弧线,表示由一对坐标、宽度和高度指定的椭圆部分。 | 
| DrawArc(Pen, Single, Single, Single, Single, Single, Single) | 绘制一个弧线,表示由一对坐标、宽度和高度指定的椭圆部分。 | 
DrawArc(Pen, Rectangle, Single, Single)
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
绘制一个弧线,表示由 Rectangle 结构指定的椭圆部分。
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 -> unitPublic Sub DrawArc (pen As Pen, rect As Rectangle, startAngle As Single, sweepAngle As Single)参数
- rect
- Rectangle
定义椭圆边界的 RectangleF 结构。
- startAngle
- Single
从 x 轴到弧线起点的顺时针测量角度(以度为单位)。
- sweepAngle
- Single
从 startAngle 参数到弧的终点,以度为单位的角度。
例外
              pen
              null。
示例
下面的代码示例设计用于 Windows 窗体,它需要 PaintEventArgse,这是 Paint 事件处理程序的参数。 该代码执行以下操作:
- 创建黑色笔。 
- 创建一个矩形来绑定椭圆。 
- 定义开始(45 度)和横扫(270 度)角度。 
- 将椭圆弧绘制到屏幕。 
结果是部分椭圆缺少 x 轴的 + 和 - 45 度之间的段。
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
注解
此方法绘制一个弧线,它是椭圆外围的一部分。 椭圆由矩形的边界定义。 弧线是 startAngle 参数和 startAngle + sweepAngle 参数之间的椭圆的外围部分。
适用于
DrawArc(Pen, RectangleF, Single, Single)
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
绘制一个弧线,表示由 RectangleF 结构指定的椭圆部分。
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 -> unitPublic Sub DrawArc (pen As Pen, rect As RectangleF, startAngle As Single, sweepAngle As Single)参数
- rect
- RectangleF
定义椭圆边界的 RectangleF 结构。
- startAngle
- Single
从 x 轴到弧线起点的顺时针测量角度(以度为单位)。
- sweepAngle
- Single
从 startAngle 参数到弧的终点,以度为单位的角度。
例外
              pen
              null
            
示例
下面的代码示例设计用于 Windows 窗体,它需要 PaintEventArgse,这是 Paint 事件处理程序的参数。 该代码执行以下操作:
- 创建黑色笔。 
- 创建一个矩形来绑定椭圆。 
- 定义开始(45 度)和横扫(270 度)角度。 
- 将椭圆弧绘制到屏幕。 
结果是部分椭圆缺少 x 轴的 + 和 - 45 度之间的段。
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
注解
此方法绘制一个弧线,它是椭圆外围的一部分。 椭圆由矩形的边界定义。 弧线是 startAngle 参数和 startAngle + sweepAngle 参数之间的椭圆的外围部分。
适用于
DrawArc(Pen, Int32, Int32, Int32, Int32, Int32, Int32)
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
绘制一个弧线,表示由一对坐标、宽度和高度指定的椭圆部分。
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 -> unitPublic Sub DrawArc (pen As Pen, x As Integer, y As Integer, width As Integer, height As Integer, startAngle As Integer, sweepAngle As Integer)参数
- x
- Int32
定义椭圆的矩形左上角的 x 坐标。
- y
- Int32
定义椭圆的矩形左上角的 y 坐标。
- width
- Int32
定义椭圆的矩形的宽度。
- height
- Int32
定义椭圆的矩形的高度。
- startAngle
- Int32
从 x 轴到弧线起点的顺时针测量角度(以度为单位)。
- sweepAngle
- Int32
从 startAngle 参数到弧的终点,以度为单位的角度。
例外
              pen
              null。
示例
下面的代码示例设计用于 Windows 窗体,它需要 PaintEventArgse,这是 Paint 事件处理程序的参数。 该代码执行以下操作:
- 创建黑色笔。 
- 创建矩形的位置和大小以绑定椭圆。 
- 定义开始(45 度)和横扫(270 度)角度。 
- 将椭圆弧绘制到屏幕。 
结果是部分椭圆缺少 x 轴的 + 和 - 45 度之间的段。
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
注解
此方法绘制一个弧线,它是椭圆外围的一部分。 椭圆由矩形的边界定义。 弧线是 startAngle 参数和 startAngle + sweepAngle 参数之间的椭圆的外围部分。
适用于
DrawArc(Pen, Single, Single, Single, Single, Single, Single)
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
- Source:
- Graphics.cs
绘制一个弧线,表示由一对坐标、宽度和高度指定的椭圆部分。
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 -> unitPublic Sub DrawArc (pen As Pen, x As Single, y As Single, width As Single, height As Single, startAngle As Single, sweepAngle As Single)参数
- x
- Single
定义椭圆的矩形左上角的 x 坐标。
- y
- Single
定义椭圆的矩形左上角的 y 坐标。
- width
- Single
定义椭圆的矩形的宽度。
- height
- Single
定义椭圆的矩形的高度。
- startAngle
- Single
从 x 轴到弧线起点的顺时针测量角度(以度为单位)。
- sweepAngle
- Single
从 startAngle 参数到弧的终点,以度为单位的角度。
例外
              pen
              null。
示例
下面的代码示例设计用于 Windows 窗体,它需要 PaintEventArgse,这是 Paint 事件处理程序的参数。 该代码执行以下操作:
- 创建黑色笔。 
- 创建矩形的位置和大小以绑定椭圆。 
- 定义开始(45 度)和横扫(270 度)角度。 
- 将椭圆弧绘制到屏幕。 
结果是部分椭圆缺少 x 轴的 + 和 - 45 度之间的段。
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
注解
此方法绘制一个弧线,它是椭圆外围的一部分。 椭圆由矩形的边界定义。 弧线是 startAngle 参数和 startAngle + sweepAngle 参数之间的椭圆的外围部分。