PdfGraphics.DrawBeziers(Pen, PointF[]) Method

Draws a series of Bezier curves by points from the specified array.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Pdf.v23.2.Drawing.dll

NuGet Package: DevExpress.Pdf.Drawing

Declaration

C#

public void DrawBeziers(
    Pen pen,
    PointF[] points
)

VB.NET

Public Sub DrawBeziers(
    pen As Pen,
    points As PointF()
)

Parameters

Name	Type	Description
pen	Pen	A Pen object that specifies the color, width, and style of the curve.
points	PointF[]	An array of PointF structures that specifies points (in world coordinate system) by which you can draw a series of Bezier curves.

Remarks

The first Bezier curve starts from the first point and ends at the fourth point. The second and third points are control points that specify the shape of the curve. Each next curve starts from the previous curve’s end point and uses three more points (two control points and an end point). To draw a series of Bezier curves, generate an array of points whose item number is a multiple of 3 plus 1, such as 4, 7, or 10. Assign the array to the points parameter. Pass the points and pen parameters to the DrawBeziers method.

To draw a shape on the PDF page, use one of the following methods:

PdfGraphics.AddToPageForeground, PdfGraphics.AddToPageBackground

These methods allow you to draw content on an existing page.

PdfDocumentProcessor.RenderNewPage

Draws content on a new page.

The code sample below draws a series of Bezier curves using seven points.

C#

using DevExpress.Pdf;
using System.Drawing;
//...

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
    processor.CreateEmptyDocument();
    PdfPage page = processor.AddNewPage(PdfPaperSize.A4);
        using (PdfGraphics graphics = processor.CreateGraphics())
        {
            // Create a point array.
            PointF[] points = new PointF[] 
            { 
              new PointF(100, 100), 
              new PointF(200, 10), 
              new PointF(350, 50), 
              new PointF(500, 100), 
              new PointF(600, 150), 
              new PointF(550, 250), 
              new PointF(500, 300) 
            };

            // Draw a series of Bezier curves.
            using (var pen = new Pen(Color.Red, 5))
                graphics.DrawBeziers(pen, points);

            // Add graphics content to the document page.
            graphics.AddToPageForeground(page, 72, 72);
        }
    processor.SaveDocument("out2.pdf");
}
Process.Start("out.pdf");

VB.NET

Imports DevExpress.Pdf
Imports System.Drawing
'...

Using processor As New PdfDocumentProcessor()
    processor.CreateEmptyDocument()
    Dim page As PdfPage = processor.AddNewPage(PdfPaperSize.A4)
        Using graphics As PdfGraphics = processor.CreateGraphics()
            ' Create a point array.
            Dim points() As PointF = {
                New PointF(100, 100),
                New PointF(200, 10),
                New PointF(350, 50),
                New PointF(500, 100),
                New PointF(600, 150),
                New PointF(550, 250),
                New PointF(500, 300)
            }

            ' Draw a series of Bezier curves.
            Using pen As New Pen(Color.Red, 5)
                graphics.DrawBeziers(pen, points)
            End Using

            ' Add graphics content to the document page.
            graphics.AddToPageForeground(page, 72, 72)
        End Using
    processor.SaveDocument("out2.pdf")
End Using
Process.Start("out.pdf")