How Can iTextSharp's PdfReader Extract Text and Images from PDF Files?

Techniques for Reading PDF Content Using iTextSharp's PdfReader

When working with PDF documents, extracting content is crucial for data analysis, text searching, and further processing. iTextSharp, a renowned C# and VB.NET library, provides powerful tools for reading and parsing PDF content.

The PdfReader class in iTextSharp enables developers to access the contents of PDF files efficiently. It offers various options for extracting both plain text and images embedded within the document.

Plain Text Extraction

To extract plain text from a PDF, you can leverage the SimpleTextExtractionStrategy class:

ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
string currentText = PdfTextExtractor.GetTextFromPage(pdfReader, page, strategy);

Here, currentText will contain the extracted text content from the specified page. Note that the text may contain non-Unicode characters, which you can convert to UTF-8 format for proper handling.

Image Extraction

If the PDF includes embedded images, you can extract them using the PdfImageExtender class:

PdfImageExtender extender = new PdfImageExtender();
List<Image> images = extender.GetImagesFromPage(pdfReader, page);

This code retrieves a list of Image objects representing the images on the specified page. You can then access each image's data and save it in an appropriate format.

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