iTextSharp和特殊字符（斯洛伐克字素） [英] iTextSharp and special characters (slovak graphemes)

问题描述

我遇到一些特殊的斯洛伐克人物（例如č，ň和ť）。它们在itextsharp生成的pdf中消失。

I am having trouble with some special slovak characters (for example č, ň and ť). They are disappearing in the itextsharp generated pdf.

从我能够找到的，这个问题与我的 BaseFont的编码有关。目前我使用的是：

From what I've been able to find, this problem has to do with encoding of my BaseFont. Currently I am using this:

BaseFont.CreateFont(BaseFont.HELVETICA, iTextSharp.text.pdf.BaseFont.CP1250, BaseFont.NOT_EMBEDDED)

有人建议这应该有效：

BaseFont.CreateFont(BaseFont.HELVETICA, iTextSharp.text.pdf.BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED)

但它抛出此异常错误：

System.ArgumentException was caught
Message='Identity-H' is not a supported encoding name.
Parameter name: name
ParamName=name
Source=mscorlib

任何人都知道可能的原因和解决方案吗？

Anyone know a possible reason and solution to this?

推荐答案

问题在于：

BaseFont.CreateFont(BaseFont.HELVETICA ...

BaseFont.HELVETICA 是标准类型1字体，不能用于您的斯洛伐克字符。您需要使用具有正确字形的字体：

BaseFont.HELVETICA is a standard type 1 font and can't be used for your slovak characters. You need to use a font with the correct glyphs:

string FONT = "c:/windows/fonts/arialbd.ttf";
using (Document document = new Document()) {
  PdfWriter.GetInstance(document, STREAM);
  document.Open();
  BaseFont bf = BaseFont.CreateFont(
    FONT, BaseFont.IDENTITY_H, BaseFont.EMBEDDED
  );
  document.Add(new Paragraph("č, ň and ť", new Font(bf, 12)));
}

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