How Can I Properly Display Czech Characters in PDFs Generated with iTextSharp?

Generating PDFs with Correct Czech Character Display in iTextSharp

Generating PDFs containing Czech characters (like "Č" or "Ć") using iTextSharp often presents challenges. These characters belong to the Central and Eastern European Latin script, distinct from Cyrillic, requiring specific handling.

Common Pitfalls to Avoid:

1. Hardcoded Characters: Avoid directly embedding special characters in your code. This makes your application susceptible to encoding inconsistencies.
2. Font Selection: Not all fonts support these characters. Helvetica, for example, may be insufficient. Utilize fonts like Arial, known for broader glyph support.
3. Font Embedding: Always embed the chosen font within the PDF. This ensures consistent rendering even on systems lacking the specific font.
4. Encoding Issues: Explicitly define the correct encoding when specifying the font. Failure to do so can lead to misinterpretation of characters by iTextSharp.
5. Code Page Limitations: While code page 1250 (supporting Unicode embedding and mixed code pages) might seem convenient, it restricts characters to single-byte representation.

Effective Solution:

To guarantee correct Czech character display:

1. Employ Unicode encoding for horizontal text (BaseFont.IDENTITY_H).
2. Ensure font embedding by setting the embedded parameter to true.
3. Use a composite font for reliable handling of mixed character sets.

By adhering to these guidelines, you'll successfully integrate Czech characters into your PDFs and prevent display errors.

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