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Graphics.DrawLine Method (Pen, Single, Single, Single, Single)

Draws a line connecting the two points specified by the coordinate pairs.

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

public void DrawLine (
	Pen pen,
	float x1,
	float y1,
	float x2,
	float y2
)
public void DrawLine (
	Pen pen, 
	float x1, 
	float y1, 
	float x2, 
	float y2
)
public function DrawLine (
	pen : Pen, 
	x1 : float, 
	y1 : float, 
	x2 : float, 
	y2 : float
)
Not applicable.

Parameters

pen

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

x1

The x-coordinate of the first point.

y1

The y-coordinate of the first point.

x2

The x-coordinate of the second point.

y2

The y-coordinate of the second point.

Exception typeCondition

ArgumentNullException

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

This method draws a line connecting the two points specified by the x1, y1, x2, and y2 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 the coordinates of the endpoints of the line.

  • Draws the line to the screen.

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

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

    // Draw line to screen.
    e.get_Graphics().DrawLine(blackPen, x1, y1, x2, y2);
} //DrawLineFloat

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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