Graphics::DrawLine Method (Pen^, Point, Point)

 

Draws a line connecting two Point structures.

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

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

Parameters

pen
Type: System.Drawing::Pen^

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

pt1
Type: System.Drawing::Point

Point structure that represents the first point to connect.

pt2
Type: System.Drawing::Point

Point structure that represents the second point to connect.

Exception Condition
ArgumentNullException

pen is null.

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 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 );
   }

.NET Framework
Available since 1.1
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