如何将PDF转换为iTextSharp的文本文件 [英] How to convert PDF to text file in iTextSharp
本文介绍了如何将PDF转换为iTextSharp的文本文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我要检索的PDF文件中的文本。但是,使用下面的代码我只得到空文本文件。
I have to retrieve text from PDF file. But using the following code I only get empty text file.
for (int i = 0; i < n; i++)
{
pagenumber = i + 1;
filename = pagenumber.ToString();
while (filename.Length < digits) filename = "0" + filename;
filename = "_" + filename;
filename = splitFile + name + filename;
// step 1: creation of a document-object
document = new Document(reader.GetPageSizeWithRotation(pagenumber));
// step 2: we create a writer that listens to the document
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(filename + ".pdf", FileMode.Create));
// step 3: we open the document
document.Open();
PdfContentByte cb = writer.DirectContent;
PdfImportedPage page = writer.GetImportedPage(reader, pagenumber);
int rotation = reader.GetPageRotation(pagenumber);
if (rotation == 90 || rotation == 270)
{
cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(pagenumber).Height);
}
else
{
cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
// step 5: we close the document
document.Close();
PDFParser parser = new PDFParser();
parser.ExtractText(filename + ".pdf", filename + ".txt");
}
我在做什么错了,我应该如何从PDF中提取文本?
What am I doing wrong and how should I extract text from PDF?
推荐答案
有关与iTextSharp的文本提取,采取库的最新版本,并使用
For text extraction with iTextSharp, take a current version of that library and use
PdfTextExtractor.GetTextFromPage(reader, pageNumber);
当心,还有在某些5.3.x版本的文本提取代码已经被同时一个bug固定于躯干。因此,您可能希望签出树干修订版。
Beware, there is a bug in the text extraction code in some 5.3.x version which has meanwhile been fixed in trunk. You, therefore, might want to checkout the trunk revision.
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