如何用iTextSharp导出含希腊字母的PDF？求助技术专家

Hey there, I see you're stuck getting Greek characters to show up in your iTextSharp-generated PDFs—let's sort this out! The core issue is that the default font iTextSharp uses doesn’t include Greek glyphs, so we need to explicitly use a font that supports Unicode (including Greek) and embed it in the PDF so it renders properly on any machine.

Here's how to adjust your code step by step:

1. Use a Unicode-Supported Font #

First, pick a font that includes Greek characters. Arial Unicode MS is a safe bet (it’s included with most Windows systems), or you can use an open-source alternative like Noto Sans Greek if you prefer. We’ll load this font as a BaseFont with the correct Unicode encoding.

2. Revised Code with Greek Font Support #

Update your existing code to create and apply the custom font to all text elements. Here’s the fixed version:

int.TryParse(Settings.Default["Invoice_counter"].ToString(), out counter);
counter++;
Settings.Default["Invoice_counter"] = counter;
Settings.Default.Save();

PdfWriter wri = PdfWriter.GetInstance(doc, new FileStream(save.FileName, FileMode.Create));
doc.Open();

// Load a font that supports Greek characters (Arial Unicode MS example)
BaseFont greekFontBase = BaseFont.CreateFont(
    @"C:\Windows\Fonts\ARIALUNI.TTF",  // Path to system font
    BaseFont.IDENTITY_H,               // Unicode encoding
    BaseFont.EMBEDDED                  // Embed font in PDF for universal display
);
Font greekFont = new Font(greekFontBase, 12); // Adjust font size as needed

PdfPTable table = new PdfPTable(2);
table.DefaultCell.Border = 0;

// Apply Greek font to your text Chunk
Chunk no = new Chunk("Α.Φ.Τ: ..." + Environment.NewLine + Environment.NewLine + "Φ.Π.Α: ..." + Environment.NewLine + Environment.NewLine + "No: " + counter, greekFont);
Paragraph invoice = new Paragraph("Invoice", greekFont); // Apply font here too if needed

iTextSharp.text.Image PNG = iTextSharp.text.Image.GetInstance("logo.png");
PNG.ScalePercent(25f);
table.AddCell(PNG);
table.AddCell(new Phrase(no)); // Don't use ToString()—it loses font formatting!

doc.Add(table);
doc.Add(invoice);
doc.Close();

Key Fixes Explained: #

• Font Encoding & Embedding: BaseFont.IDENTITY_H ensures full Unicode support, and BaseFont.EMBEDDED makes sure the font is included in the PDF (so Greek characters show up even on devices without the font installed).
• Proper Text Element Handling: We pass the greekFont directly to Chunk and Paragraph constructors. Avoid using no.ToString()—this converts the formatted Chunk to plain text and loses all font information.
• Portability Tip: If deploying to other machines, embed the font file in your project (set its "Copy to Output Directory" property to "Copy if newer") and use a relative path instead of the system font path.

For Full Greek DataGridView Export #

When you’re ready to export your entire Greek DataGridView, apply the same greekFont to every cell in your PDF table. For each cell value from the grid, create a Phrase or Chunk with the greekFont and add it to the PDF table cell. This ensures all Greek text from the grid renders correctly.

内容的提问来源于stack exchange，提问作者Antreas Antreou