PdfGraphics.DrawBezier(Pen, PointF, PointF, PointF, PointF) Method

Draws a Bezier curve specified by four points (in the world coordinate system).

Namespace: DevExpress.Pdf

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

NuGet Package: DevExpress.Pdf.Drawing

Declaration

C#

public void DrawBezier(
    Pen pen,
    PointF pt1,
    PointF pt2,
    PointF pt3,
    PointF pt4
)

VB.NET

Public Sub DrawBezier(
    pen As Pen,
    pt1 As PointF,
    pt2 As PointF,
    pt3 As PointF,
    pt4 As PointF
)

Parameters

Name	Type	Description
pen	Pen	A Pen object that specifies the color, width, and style of the curve.
pt1	PointF	A Point structure that specifies the start point of the curve.
pt2	PointF	A Point structure that specifies the first control point of the curve.
pt3	PointF	A Point structure that specifies the second control point of the curve.
pt4	PointF	A Point structure that specifies the end point of the curve.

Remarks

The 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. To draw a Bezier curve, pass the pen parameter and point parameters (pt1, pt2, pt3, pt4) to the DrawBezier 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 Bezier curve using the four specified 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())
        {
            // Draw a Bezier curve.
            using (var pen = new Pen(Color.Red, 5))
            graphics.DrawBezier(pen, new PointF(100, 750), 
                new PointF(170, 100), new PointF(300, 500), 
                new PointF(400, 100));

            // 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()
            ' Draw a Bezier curve.
            Using pen As New Pen(Color.Red, 5)
            graphics.DrawBezier(pen, New PointF(100, 750), 
        New PointF(170, 100), New PointF(300, 500), 
        New PointF(400, 100))
            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")