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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
)

Parameters

pen
Type: System.Drawing.Pen

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

pt1
Type: System.Drawing.PointF

PointF structure that represents the first point to connect.

pt2
Type: System.Drawing.PointF

PointF structure that represents the second point to connect.

ExceptionCondition
ArgumentNullException

pen is null.

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 PaintEventArgs e, 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);
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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