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Graphics.DrawLine Method (Pen, PointF, PointF)

Draws a line connecting two PointF structures.

Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)

public void DrawLine (
	Pen pen,
	PointF pt1,
	PointF pt2
)
public void DrawLine (
	Pen pen, 
	PointF pt1, 
	PointF pt2
)
public function DrawLine (
	pen : Pen, 
	pt1 : PointF, 
	pt2 : PointF
)
Not applicable.

Parameters

pen

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

pt1

PointF structure that represents the first point to connect.

pt2

PointF structure that represents the second point to connect.

Exception typeCondition

ArgumentNullException

pen is a null reference (Nothing in Visual Basic).

This method draws a line connecting the two points specified by the pt1 and p2 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 points for the endpoints of the line.

  • Draws the line to the screen.

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 void DrawLinePointF(PaintEventArgs e) 
{
    // Create pen.
    Pen blackPen =  new Pen(Color.get_Black(), 3);

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

    // Draw line to screen.
    e.get_Graphics().DrawLine(blackPen, point1, point2);
} //DrawLinePointF

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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