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Graphics.DrawBeziers Method (Pen, Point())

Draws a series of Bézier splines from an array of Point structures.

Namespace:  System.Drawing
Assembly:  System.Drawing (in System.Drawing.dll)
'Declaration
Public Sub DrawBeziers ( _
	pen As Pen, _
	points As Point() _
)

Parameters

pen
Type: System.Drawing.Pen

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

points
Type: System.Drawing.Point()

Array of Point structures that represent the points that determine the curve. The number of points in the array should be a multiple of 3 plus 1, such as 4, 7, or 10.

ExceptionCondition
ArgumentNullException

pen is Nothing.

-or-

points is Nothing.

The number of points in the array should be a multiple of 3 plus 1 because the first spline requires 4 points and any other splines require 3 points each. The first Bézier spline is drawn from the first point to the fourth point in the point array. The second and third points are control points that determine the shape of the curve. Each subsequent curve needs exactly three more points: two more control points and an ending point. The ending point of the previous curve is used as the starting point for each additional curve.

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 the start, end, and two control points for a first curve and endpoint and two control points for a second curve.

  • Draws the successive Bézier curves to the screen.

Private Sub DrawBeziersPoint(ByVal e As PaintEventArgs)

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

    ' Create points for curve. 
    Dim start As New Point(100, 100)
    Dim control1 As New Point(200, 10)
    Dim control2 As New Point(350, 50)
    Dim end1 As New Point(500, 100)
    Dim control3 As New Point(600, 150)
    Dim control4 As New Point(650, 250)
    Dim end2 As New Point(500, 300)
    Dim bezierPoints As Point() = {start, control1, control2, _
    end1, control3, control4, end2}

    ' Draw arc to screen.
    e.Graphics.DrawBeziers(blackPen, bezierPoints)
End Sub

.NET Framework

Supported in: 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 Phone 8.1, Windows Phone 8, 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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