用于从PDF文件中删除文本的C#解决方案

using System;
using System.IO;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;

namespace RemoveTextFromPdf
{
    class Program
    {
        static void Main(string[] args)
        {
            string inputFile = "input.pdf";
            string outputFile = "output.pdf";

            PdfReader reader = new PdfReader(inputFile);
            using (PdfStamper stamper = new PdfStamper(reader, new FileStream(outputFile, FileMode.Create)))
            {
                for (int i = 1; i <= reader.NumberOfPages; i++)
                {
                    PdfContentByte contentByte = stamper.GetOverContent(i);
                    contentByte.SetColorFill(BaseColor.WHITE);

                    // Create a TextExtractionStrategy object to extract text from the PDF page
                    var strategy = new SimpleTextExtractionStrategy();
                    string currentText = PdfTextExtractor.GetTextFromPage(reader, i, strategy);

                    // Remove specific text from the page
                    string textToRemove = "Text to remove";
                    currentText = currentText.Replace(textToRemove, "");

                    // Create a new PDF page with the modified text
                    ColumnText.ShowTextAligned(contentByte, Element.ALIGN_LEFT, new Phrase(currentText), 0, 0, 0);
                }
            }
        }
    }
}