page count zero

[mayurjansari]

Summary of the issue

qrcode.pdf this is QRCode file with zero count page. it open proper in acrobat reader and any browser.

Environment

iTextSharp.LGPLv2.Core version: 1.7.1
.NET Core SDK version: 4.7
IDE: vs 2019 16.9.1

Example code/Steps to reproduce:

var reader = new PdfReader(file);
return Image.GetInstance(writer.GetImportedPage(reader, pageNumber));

Output:

Exception message: Invalid page number: 1
Full Stack trace:    at iTextSharp.text.pdf.PdfReaderInstance.GetImportedPage(Int32 pageNumber)
   at iTextSharp.text.pdf.PdfWriter.GetImportedPage(PdfReader reader, Int32 pageNumber)
   at IText.GetImportedPageImage(PdfWriter writer, Byte[] btPdf, Int32 pageNumber) in iText.cs:line 125
   at IText.Create(String bgPdf, DataRow row, Field[] fields) in IText.cs:line 151