问题
How can I change the font of a existing PDF file with iTextSharp in C#?
I want to change the whole documents font into one e.g. Arial
回答1:
Finally I solved the problem. The following code will open an existing Pdf file and will change all its font to 'Braille' as per my expectation.
private static void ChangeFont()
{
string strFile = @"E:\\xyz.pdf";
string OutputFile = @"E:\\xyz1.pdf";
PdfReader pdfReader = new PdfReader(strFile);
//Get first page,Generally we get font information on first page,however we can loop throw pages e.g for(int i=0;i<=pdfReader.NumberOfPages;i++)
PdfDictionary cpage = pdfReader.GetPageN(1);
if (cpage == null)
return;
PdfDictionary dictFonts = cpage.GetAsDict(PdfName.RESOURCES).GetAsDict(PdfName.FONT);
if (dictFonts != null)
{
foreach (var font in dictFonts)
{
var dictFontInfo = dictFonts.GetAsDict(font.Key);
if (dictFontInfo != null)
{
foreach (var f in dictFontInfo)
{
//Get the font name-optional code
var baseFont = dictFontInfo.Get(PdfName.BASEFONT);
string strFontName = System.Text.Encoding.ASCII.GetString(baseFont.GetBytes(), 0,
baseFont.Length);
//
//Remove the current font
dictFontInfo.Remove(PdfName.BASEFONT);
//Set new font eg. Braille, Areal etc
dictFontInfo.Put(PdfName.BASEFONT, new PdfString("Braille"));
break;
}
}
}
}
//Now create a new document with updated font
using (FileStream FS = new FileStream(OutputFile, FileMode.Create, FileAccess.Write, FileShare.None))
{
using (Document Doc = new Document())
{
using (PdfCopy writer = new PdfCopy(Doc, FS))
{
Doc.Open();
for (int j = 1; j <= pdfReader.NumberOfPages; j++)
{
writer.AddPage(writer.GetImportedPage(pdfReader, j));
}
Doc.Close();
}
}
}
pdfReader.Close();
}
来源：https://stackoverflow.com/questions/15225488/changing-font-of-pdf-using-itextsharp