iTextSharp 5 generated PDF-Document AdobeReader-compatibility [duplicate] - itext

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This question already has answers here:
iTextSharp-generated PDFs now cause Save dialog in Adobe Reader X
(2 answers)
Closed 5 years ago.
I am generating some reports with iTextSharp 5.
Opening the generated .PDF-file, everything looks and actually is fine with most PDF-readers.
When I open the PDF using AdobeReader(DC) however, it asks me if i want to save the changes on close. Although I didn't change anything.
Hitting 'Cancel' sure makes the message window go away, but hitting save causes the file to actually shrinks in size.
Now what is happening there? And why? How can I disable it?
The users of the application are most likely gonna use AdobeReader as well.
I don't want them to see the save dialog anytime they open a report.
Here is my BaseReport class
public abstract class BaseReport : PdfPageEventHelper
{
protected const string SPACE = " ";
protected const string COLON = ":";
protected static string NEWLINE = Environment.NewLine;
protected Document document;
protected PdfTemplate footerTemplate;
protected PdfContentByte contentByte;
protected PdfWriter writer;
private PdfTemplate totalPageNoTemplate;
private int lastPageNumber;
// properties for header
private bool done;
// needs to be overriden in subclass order to use header feature
protected string kundeHeader { get; set; }
// font definitions
protected BaseFont baseFont;
protected Font fontFooter;
protected Font fontGeneralText;
protected Font fontLabelText;
protected Font fontBoldLabelText;
protected Font fontBoldText;
protected Font fontSpace;
protected Font fontLargeBoldText;
protected int language;
protected bool useLogo = false;
protected bool usePageNumbers = false;
protected bool usePrintDate = false;
protected const string PRINT_FULLDATE_FORMAT = "dd.MM.yyyy HH:mm";
protected const string PRINT_DATE_ONLY_FORMAT = "dd.MM.yyyy";
protected Rectangle pagesize = PageSize.A4;
protected float marginLeft = 80;
protected float marginRight = 35;
protected float marginTop = 40;
protected float marginBottom = 40;
private MemoryStream PDFStream { get; set; } = new MemoryStream();
private DateTime printDate;
public BaseReport(int language = Languages.DE, bool landscape = false)
{
this.language = language;
if (landscape)
{
pagesize = pagesize.Rotate();
}
}
public byte[] GenerateReport()
{
CultureInfo cultureBefore = Resources.Culture;
try
{
Resources.Culture = SelectCultureForLangauge();
PrepareReport();
document = new Document(pagesize, marginLeft, marginRight, marginTop, marginBottom);
BuildFonts();
OpenDocument();
PrepareDocument();
GenerateContent();
document.Close();
return PDFStream.GetBuffer();
} finally
{
Resources.Culture = cultureBefore;
}
}
public void GenerateReport(string filename)
{
byte[] report = GenerateReport();
using (FileStream f = new FileStream(filename, FileMode.Create))
{
f.Write(report, 0, report.Length);
}
}
protected CultureInfo SelectCultureForLangauge()
{
string languageCode = GetLanguageCode();
return CultureInfo.GetCultureInfo(languageCode);
}
protected string GetLanguageCode()
{
string languageCode = string.Empty;
switch (language)
{
case Languages.FR: languageCode = "FR"; break;
case Languages.IT: languageCode = "IT"; break;
case Languages.EN: languageCode = "EN"; break;
default: languageCode = "DE"; break;
}
return languageCode;
}
protected virtual void PrepareReport() { }
protected virtual void PrepareDocument() { }
protected abstract void GenerateContent();
private void BuildFonts()
{
baseFont = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
fontFooter = FontFactory.GetFont(FontFactory.HELVETICA, 11, Font.ITALIC, BaseColor.DARK_GRAY);
fontGeneralText = FontFactory.GetFont(FontFactory.HELVETICA, 11, Font.NORMAL, BaseColor.BLACK);
fontLabelText = FontFactory.GetFont(FontFactory.HELVETICA, 8.5f, Font.NORMAL, BaseColor.BLACK);
fontBoldLabelText = FontFactory.GetFont(FontFactory.HELVETICA, 8.5f, Font.BOLD, BaseColor.BLACK);
fontBoldText = FontFactory.GetFont(FontFactory.HELVETICA, 11, Font.BOLD, BaseColor.BLACK);
fontSpace = FontFactory.GetFont(FontFactory.HELVETICA, 3.5f, Font.NORMAL, BaseColor.BLACK);
fontLargeBoldText = FontFactory.GetFont(FontFactory.HELVETICA, 17, Font.BOLD, BaseColor.BLACK);
GetFontIfAvailable();
}
private void GetFontIfAvailable()
{
string fileName = "IF_Rg";
try
{
baseFont = LoadFontFromFile(fileName, true);
fontFooter = new Font(baseFont, 11, Font.ITALIC, BaseColor.DARK_GRAY);
fontGeneralText = new Font(baseFont, 11, Font.NORMAL, BaseColor.BLACK);
fontLabelText = new Font(baseFont, 8.5f, Font.NORMAL, BaseColor.BLACK);
fontBoldLabelText = new Font(baseFont, 8.5f, Font.BOLD, BaseColor.BLACK);
fontBoldText = new Font(baseFont, 11, Font.BOLD, BaseColor.BLACK);
fontSpace = new Font(baseFont, 3.5f, Font.NORMAL, BaseColor.BLACK);
fontLargeBoldText = new Font(baseFont, 17, Font.BOLD, BaseColor.BLACK);
} catch (FileNotFoundException)
{
LogWrapper.Warn("Font not found - using default.");
}
}
protected BaseFont LoadFontFromFile(string fileName, bool embedded)
{
string fontPath = Environment.GetEnvironmentVariable("SystemRoot") + "\\fonts\\" + fileName + ".ttf";
if (File.Exists(fontPath))
{
return BaseFont.CreateFont(fontPath, BaseFont.WINANSI, embedded);
}
else
{
throw new FileNotFoundException($"Fontfile {fileName} was not found!");
}
}
protected Image HeaderLogo()
{
Image logo = Image.GetInstance(Resources.logo, BaseColor.BLACK);
// TODO msc pick logo from debitor
logo.ScaleToFit(100f, 100f);
return logo;
}
protected void OpenDocument()
{
writer = PdfWriter.GetInstance(document, PDFStream);
writer.PageEvent = this;
writer.SetFullCompression();
document.Open();
contentByte = writer.DirectContent;
}
protected void AddLabelAt(string label, float posX, float posY)
{
PdfContentByte cb = writer.DirectContent;
ColumnText column = new ColumnText(cb);
column.SetText(new Paragraph(label + NEWLINE, fontLabelText));
column.SetSimpleColumn(posX, 20, posX + 200, posY);
column.Go();
}
protected void AddLabelOnMargin(string label)
{
AddLabelAt(label, document.LeftMargin - 40, writer.GetVerticalPosition(false));
}
protected Phrase ParaLine(string Text, Font textfont)
{
return new Phrase(Text, textfont);
}
public override void OnOpenDocument(PdfWriter writer, Document document)
{
if (usePageNumbers)
{
totalPageNoTemplate = writer.DirectContentUnder.CreateTemplate(50, 50);
}
if (usePrintDate)
{
printDate = DateTime.Now;
}
}
public override void OnStartPage(PdfWriter writer, Document document)
{
if (useLogo || (document.PageNumber > 1 && !string.IsNullOrEmpty(kundeHeader)))
{
PdfContentByte canvas = writer.DirectContentUnder;
canvas.SaveState();
if (document.PageNumber > 1 && !string.IsNullOrEmpty(kundeHeader))
{
//showtextaligned only shows a single line
//therefor the header needs to be split and its parts need to be added seperately
string[] headerParts = kundeHeader.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
Phrase header = new Phrase(kundeHeader, fontLabelText);
ColumnText.ShowTextAligned(canvas, Element.ALIGN_LEFT,
ParaLine(headerParts[0], fontLabelText),
document.LeftMargin,
document.Top + 30, 0);
ColumnText.ShowTextAligned(canvas, Element.ALIGN_LEFT,
ParaLine(headerParts[1], fontLabelText),
document.LeftMargin,
document.Top + 20, 0);
}
if (useLogo)
{
Image logo = HeaderLogo();
logo.SetAbsolutePosition(marginLeft - 17.5f, document.Top + document.TopMargin - 50);
document.Add(logo);
}
canvas.RestoreState();
}
}
public override void OnEndPage(PdfWriter writer, Document document)
{
if (usePageNumbers || usePrintDate)
{
PdfContentByte canvas = writer.DirectContentUnder;
canvas.SaveState();
if (usePageNumbers)
{
// adds current page number to the footer section of the document
int pageN = writer.PageNumber;
string text = Resources.LabelSeite + SPACE + pageN + "/";
float len = fontLabelText.BaseFont.GetWidthPoint(text, fontLabelText.Size);
ColumnText.ShowTextAligned(canvas, Element.ALIGN_LEFT,
ParaLine(text, fontLabelText),
document.LeftMargin,
document.Bottom - 10, 0);
// adds template to fill in total page number (see OnCloseDocument method)
canvas.AddTemplate(totalPageNoTemplate, document.LeftMargin + len, document.Bottom - 10);
lastPageNumber = pageN;
}
if (usePrintDate)
{
// adds the printdate to the footer secdtion of the document
string dateFormatted = printDate.ToString(PRINT_FULLDATE_FORMAT);
ColumnText.ShowTextAligned(canvas, Element.ALIGN_RIGHT,
ParaLine(dateFormatted, fontLabelText),
document.Right,
document.Bottom - 10, 0);
}
canvas.RestoreState();
}
}
public override void OnCloseDocument(PdfWriter writer, Document document)
{
if (usePageNumbers)
{
// fills in the total page number to the prepared template in the footer section of the document
string text = lastPageNumber + "";
float widthPoint = fontLabelText.BaseFont.GetWidthPoint(text, fontLabelText.Size);
totalPageNoTemplate.Width = widthPoint;
ColumnText.ShowTextAligned(totalPageNoTemplate, Element.ALIGN_LEFT, ParaLine(text, fontLabelText), 0, 0, 0);
}
}

Answer 1

iTextSharp-generated PDFs now cause Save dialog in Adobe Reader X
I had to switch PDFStream.GetBuffer() with PDFStream.ToArray(); problem solved.