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Help opening and modifying PDF documents http://forum.pdfsharp.com/viewtopic.php?f=2&t=375 |
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Author: | roman [ Tue Apr 22, 2008 5:29 am ] |
Post subject: | Help opening and modifying PDF documents |
Hi all. I am new to using PDFSharp and I'm a little confused on how I can open an existing document and modify the fields in it. Below is the code that I am using: Code: string filepath = "C:/Documents and Settings/Administrator/Desktop/PDFsharp/PDFs/BL.pdf";
PdfDocument doc1 = new PdfDocument("Bill Of Lading instructions"); doc1 = PdfReader.Open(filepath, PdfDocumentOpenMode.Modify); PdfPage page1 = doc1.AddPage(); PdfAcroForm acroForm = doc1.AcroForm; PdfAcroField.PdfAcroFieldCollection fields = acroForm.Fields; However, the last line "PdfAcroField.PdfAcroFieldCollection" returns NullReferenceException: Object reference not set to an instance of an object. I was wondering if anyone could please help me out with my issue? Best regards, Roman |
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