BarcodeGenerator.ExportToPdf(String, Encoding, Stream) Method

Exports a barcode to PDF format.

Namespace: DevExpress.Docs.Barcode

Assembly: DevExpress.Docs.Barcode.v26.1.dll

Declaration

C#

public void ExportToPdf(
    string text,
    Encoding encoding,
    Stream stream
)

VB.NET

Public Sub ExportToPdf(
    text As String,
    encoding As Encoding,
    stream As Stream
)

Parameters

Name	Type	Description
text	String	The text to encode in the barcode.
encoding	Encoding	The text encoding type.
stream	Stream	The stream to which the PDF document is written.

Remarks

The following code snippet exports a barcode to PDF format and then saves it to a file using the PdfDocument class:

C#

using DevExpress.Docs;
using DevExpress.Docs.Barcode;
using DevExpress.Docs.Pdf;
using System.Drawing;

namespace ConsoleApp1;

public class Program {
    public static async Task Main(string[] _) {

        // Configure QR code options.
        QRCodeOptions qrOptions = new QRCodeOptions {
            ErrorCorrectionLevel = QRCodeErrorCorrectionLevel.H,
            CompactionMode = QRCodeCompactionMode.Auto,
            IncludeQuietZone = false,
            Version = QRCodeVersion.Version10,
            ModuleSize = 40,
            BackColor = Color.LightGray,
            ShowText = false,
            Padding = new Padding(5),
            BorderWidth = 1,
            BorderColor = Color.Blue,
            Width = 500,
            Height = 500,
        };

        using BarcodeGenerator generator = new BarcodeGenerator(qrOptions);

        // Export the barcode as PDF.
        using MemoryStream pdfMemoryStream = new MemoryStream();
        generator.ExportToPdf("https://example.com", Encoding.UTF8, pdfMemoryStream);
        pdfMemoryStream.Position = 0;

        // Create a PDF document from the stream, add text to it, and save it to a file.
        using PdfDocument pdfDocument = new PdfDocument(pdfMemoryStream);
        pdfDocument.Pages[0].AddTextFragment("Scan it", 60, 300);
        using FileStream outputStream = new FileStream(@"D:\output.pdf", FileMode.Create, FileAccess.Write);
        pdfDocument.Save(outputStream);
}

VB.NET

Imports DevExpress.Docs
Imports DevExpress.Docs.Barcode
Imports DevExpress.Docs.Pdf
Imports System.Drawing

Namespace ConsoleApp1

    Public Class Program
        Public Shared Sub Main(args As String())

            ' Configure QR code options.
            Dim qrOptions As New QRCodeOptions With {
                .ErrorCorrectionLevel = QRCodeErrorCorrectionLevel.H,
                .CompactionMode = QRCodeCompactionMode.Auto,
                .IncludeQuietZone = False,
                .Version = QRCodeVersion.Version10,
                .ModuleSize = 40,
                .BackColor = Color.LightGray,
                .ShowText = False,
                .Padding = New Padding(5),
                .BorderWidth = 1,
                .BorderColor = Color.Blue,
                .Width = 500,
                .Height = 500
            }

            Using generator As New BarcodeGenerator(qrOptions)

                ' Export the barcode as PDF.
                Using pdfMemoryStream As New MemoryStream()
                    generator.ExportToPdf("https://example.com", Encoding.UTF8, pdfMemoryStream)
                    pdfMemoryStream.Position = 0

                    ' Create a PDF document from the stream, add text to it, and save it to a file.
                    Using pdfDocument As New PdfDocument(pdfMemoryStream)
                        pdfDocument.Pages(0).AddTextFragment("Scan it", 60, 300)
                        Using outputStream As New FileStream("D:\output.pdf", FileMode.Create, FileAccess.Write)
                            pdfDocument.Save(outputStream)
                        End Using
                    End Using
                End Using
            End Using
        End Sub
    End Class
End Namespace