} // proc CheckPageNumber
/// <summary>Open a page of the pdf-document</summary>
/// <param name="pageNumber">Page number, zero indexed.</param>
/// <returns>Page object.</returns>
public PdfPage OpenPage(int pageNumber)
{
CheckPageNumber(pageNumber);
lock (FPDF_LibraryLock)
return(new PdfPage(this, FPDF_LoadPage(documentHandle.DangerousGetHandle(), pageNumber), pageNumber));
} // func OpenPage
private PdfReader(PdfDocumentHandle documentHandle, string pdfName, IDisposable dispose)
{
this.documentHandle = documentHandle ?? throw new ArgumentNullException(nameof(documentHandle));
this.pdfName = pdfName ?? "unknown.pdf";
this.dispose = dispose;
Properties = new PdfProperties(this);
// read pdf version
if (!FPDF_GetFileVersion(documentHandle.DangerousGetHandle(), out var tmp))
{
throw PdfReaderException.Create(pdfName);
}
pdfVersion = new Version(tmp / 10, tmp % 10);
// read page count
pageCount = FPDF_GetPageCount(documentHandle.DangerousGetHandle());
if (pageCount < 0)
{
throw PdfReaderException.Create(pdfName);
}
} // ctor
