c# - Created PDF file is missing characters in Turkish language

Question

Well, I am trying to export some data from my WinForms application to a PDF file. I have downloaded some fonts which support Turkish language characters. In the Turkish language, there are some letters like ?,?,?,?,ü,?. My code has no problems with showing ?,?,ü but somehow when the user inputs ?, ? or ?, these letters get represented as blank in the PDF file.

My code is below:

Document doc= new Document(iTextSharp.text.PageSize.LETTER, 10, 10, 42, 35);
PdfWriter wri=PdfWriter.GetInstance(doc, new FileStream("Test.pdf", FileMode.Create));
doc.Open();

BaseFont bf = BaseFont.CreateFont(@"C:aller.ttf", BaseFont.CP1252, BaseFont.EMBEDDED);
iTextSharp.text.Font font = new iTextSharp.text.Font(bf, 10, iTextSharp.text.Font.NORMAL);
Paragraph p1 = new Paragraph(new Chunk("????ü?", font));

doc.AddLanguage("tr-TR");
wri.SetLanguage("tr-TR");
doc.Add(p1);
doc.Close();

So, where is my mistake?

Answer 1

after tryings, I found the answer;

BaseFont bF = BaseFont.CreateFont("C:\windows\fonts\arial.ttf", "windows-1254", true);
 iTextSharp.text.Font f = new iTextSharp.text.Font(bF, 12f, iTextSharp.text.Font.NORMAL);
 Chunk c = new Chunk();
 c.Font = f;
 iTextSharp.text.Document document = new iTextSharp.text.Document();
 PdfWriter.GetInstance(document, new FileStream(@"C:gorsel.pdf", FileMode.Create));
 string text = "kü?ük harf türk?e karakterler : ? ? ? ? ? ü 
" +
 " BüYüK TüRK?E KARAKTERLER : ? ? ? ? ? ü";
 c.Append(text);
 document.Open();
 document.Add(new Paragraph(c));
 document.Close();

now I can use all special characters in my PDF file.