How to: Create a ZUGFeRD-Compliant PDF Invoice

• Apr 06, 2021

The code sample below shows how to attach a ZUGFeRD-compliant XML to the PDF document and save the result:

C#

using (PdfDocumentProcessor pdfDocumentProcessor = new PdfDocumentProcessor())
{
    pdfDocumentProcessor.LoadDocument("Invoice.pdf");
    pdfDocumentProcessor.Document.AttachZugferdInvoice
        (File.ReadAllBytes("ZUGFeRD-invoice.xml"));
    pdfDocumentProcessor.SaveDocument("Invoice_Upd.pdf");
}

VB.NET

Using pdfDocumentProcessor As New PdfDocumentProcessor()
    pdfDocumentProcessor.LoadDocument("Invoice.pdf")
    pdfDocumentProcessor.Document.AttachZugferdInvoice
        (File.ReadAllBytes("ZUGFeRD-invoice.xml"))
    pdfDocumentProcessor.SaveDocument("Invoice_Upd.pdf")
End Using

Note

The AttachZugferdInvoice method does not convert the document to a PDF/A-3b compatible file. Make sure that your document is PDF/A-3b compliant.