Graphics.DrawLine 方法

定义

命名空间:

System.Drawing

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v9.0.0-preview.6.24327.6

绘制连接坐标对指定的两个点的线条。

重载

DrawLine(Pen, Int32, Int32, Int32, Int32)	绘制连接坐标对指定的两个点的线条。
DrawLine(Pen, Single, Single, Single, Single)	绘制连接坐标对指定的两个点的线条。
DrawLine(Pen, Point, Point)	绘制连接两个 Point 结构的线条。
DrawLine(Pen, PointF, PointF)	绘制连接两个 PointF 结构的线条。

DrawLine(Pen, Int32, Int32, Int32, Int32)

Source:

Graphics.cs

绘制连接坐标对指定的两个点的线条。

public:
 void DrawLine(System::Drawing::Pen ^ pen, int x1, int y1, int x2, int y2);

public void DrawLine (System.Drawing.Pen pen, int x1, int y1, int x2, int y2);

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

Public Sub DrawLine (pen As Pen, x1 As Integer, y1 As Integer, x2 As Integer, y2 As Integer)

参数

pen

Pen

确定线条的颜色、宽度和样式的 Pen。

x1

Int32

第一个点的 x 坐标。

y1

Int32

第一个点的 y 坐标。

x2

Int32

第二个点的 x 坐标。

y2

Int32

第二个点的 y 坐标。

例外

ArgumentNullException

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。

• 创建线条终结点的坐标。

• 将线条绘制到屏幕。

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

      // Create coordinates of points that define line.
      int x1 = 100;
      int y1 = 100;
      int x2 = 500;
      int y2 = 100;

      // Draw line to screen.
      e->Graphics->DrawLine( blackPen, x1, y1, x2, y2 );
   }

public void DrawLineInt(PaintEventArgs e)
{
             
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
             
    // Create coordinates of points that define line.
    int x1 = 100;
    int y1 = 100;
    int x2 = 500;
    int y2 = 100;
             
    // Draw line to screen.
    e.Graphics.DrawLine(blackPen, x1, y1, x2, y2);
}

Public Sub DrawLineInt(ByVal e As PaintEventArgs)

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

    ' Create coordinates of points that define line.
    Dim x1 As Integer = 100
    Dim y1 As Integer = 100
    Dim x2 As Integer = 500
    Dim y2 As Integer = 100

    ' Draw line to screen.
    e.Graphics.DrawLine(blackPen, x1, y1, x2, y2)
End Sub

注解

此方法绘制一条线，用于连接由 x1、y1、x2和 y2 参数指定的两个点。

另请参阅

• 使用笔绘制线条和形状

DrawLine(Pen, Single, Single, Single, Single)

Source:

Graphics.cs

绘制连接坐标对指定的两个点的线条。

public:
 void DrawLine(System::Drawing::Pen ^ pen, float x1, float y1, float x2, float y2);

public void DrawLine (System.Drawing.Pen pen, float x1, float y1, float x2, float y2);

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

Public Sub DrawLine (pen As Pen, x1 As Single, y1 As Single, x2 As Single, y2 As Single)

参数

pen

Pen

确定线条的颜色、宽度和样式的 Pen。

x1

Single

第一个点的 x 坐标。

y1

Single

第一个点的 y 坐标。

x2

Single

第二个点的 x 坐标。

y2

Single

第二个点的 y 坐标。

例外

ArgumentNullException

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。

• 创建线条终结点的坐标。

• 将线条绘制到屏幕。

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

      // Create coordinates of points that define line.
      float x1 = 100.0F;
      float y1 = 100.0F;
      float x2 = 500.0F;
      float y2 = 100.0F;

      // Draw line to screen.
      e->Graphics->DrawLine( blackPen, x1, y1, x2, y2 );
   }

public void DrawLineFloat(PaintEventArgs e)
{
             
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
             
    // Create coordinates of points that define line.
    float x1 = 100.0F;
    float y1 = 100.0F;
    float x2 = 500.0F;
    float y2 = 100.0F;
             
    // Draw line to screen.
    e.Graphics.DrawLine(blackPen, x1, y1, x2, y2);
}

Public Sub DrawLineFloat(ByVal e As PaintEventArgs)

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

    ' Create coordinates of points that define line.
    Dim x1 As Single = 100.0F
    Dim y1 As Single = 100.0F
    Dim x2 As Single = 500.0F
    Dim y2 As Single = 100.0F

    ' Draw line to screen.
    e.Graphics.DrawLine(blackPen, x1, y1, x2, y2)
End Sub

注解

此方法绘制一条线，用于连接由 x1、y1、x2和 y2 参数指定的两个点。

另请参阅

• 使用笔绘制线条和形状

DrawLine(Pen, Point, Point)

Source:

Graphics.cs

绘制连接两个 Point 结构的线条。

public:
 void DrawLine(System::Drawing::Pen ^ pen, System::Drawing::Point pt1, System::Drawing::Point pt2);

public void DrawLine (System.Drawing.Pen pen, System.Drawing.Point pt1, System.Drawing.Point pt2);

member this.DrawLine : System.Drawing.Pen * System.Drawing.Point * System.Drawing.Point -> unit

Public Sub DrawLine (pen As Pen, pt1 As Point, pt2 As Point)

参数

pen

Pen

确定线条的颜色、宽度和样式的 Pen。

pt1

Point

Point 表示要连接的第一个点的结构。

pt2

Point

Point 表示要连接的第二个点的结构。

例外

ArgumentNullException

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。

• 为线条的终结点创建点。

• 将线条绘制到屏幕。

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

      // Create points that define line.
      Point point1 = Point(100,100);
      Point point2 = Point(500,100);

      // Draw line to screen.
      e->Graphics->DrawLine( blackPen, point1, point2 );
   }

public void DrawLinePoint(PaintEventArgs e)
{
             
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
             
    // Create points that define line.
    Point point1 = new Point(100, 100);
    Point point2 = new Point(500, 100);
             
    // Draw line to screen.
    e.Graphics.DrawLine(blackPen, point1, point2);
}

Public Sub DrawLinePoint(ByVal e As PaintEventArgs)

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

    ' Create points that define line.
    Dim point1 As New Point(100, 100)
    Dim point2 As New Point(500, 100)

    ' Draw line to screen.
    e.Graphics.DrawLine(blackPen, point1, point2)
End Sub

另请参阅

• 使用笔绘制线条和形状

DrawLine(Pen, PointF, PointF)

Source:

Graphics.cs

绘制连接两个 PointF 结构的线条。

public:
 void DrawLine(System::Drawing::Pen ^ pen, System::Drawing::PointF pt1, System::Drawing::PointF pt2);

public void DrawLine (System.Drawing.Pen pen, System.Drawing.PointF pt1, System.Drawing.PointF pt2);

member this.DrawLine : System.Drawing.Pen * System.Drawing.PointF * System.Drawing.PointF -> unit

Public Sub DrawLine (pen As Pen, pt1 As PointF, pt2 As PointF)

参数

pen

Pen

确定线条的颜色、宽度和样式的 Pen。

pt1

PointF

PointF 表示要连接的第一个点的结构。

pt2

PointF

PointF 表示要连接的第二个点的结构。

例外

ArgumentNullException

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。

• 为线条的终结点创建点。

• 将线条绘制到屏幕。

public:
   void DrawLinePointF( PaintEventArgs^ e )
   {

      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );
      
      // Create points that define line.
      PointF point1 = PointF(100.0F,100.0F);
      PointF point2 = PointF(500.0F,100.0F);

      // Draw line to screen.
      e->Graphics->DrawLine( blackPen, point1, point2 );
   }

public void DrawLinePointF(PaintEventArgs e)
{
             
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
             
    // Create points that define line.
    PointF point1 = new PointF(100.0F, 100.0F);
    PointF point2 = new PointF(500.0F, 100.0F);
             
    // Draw line to screen.
    e.Graphics.DrawLine(blackPen, point1, point2);
}

Public Sub DrawLinePointF(ByVal e As PaintEventArgs)

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

    ' Create points that define line.
    Dim point1 As New PointF(100.0F, 100.0F)
    Dim point2 As New PointF(500.0F, 100.0F)

    ' Draw line to screen.
    e.Graphics.DrawLine(blackPen, point1, point2)
End Sub

注解

此方法绘制连接由 pt1 和 p2 参数指定的两个点的线条。

另请参阅

• 使用笔绘制线条和形状