本文实例讲述了C#使用iTextSharp将PDF转成文本的方法。分享给大家供大家参考。具体实现方法如下：

using System; using System.IO; using iTextSharp.text; using iTextSharp.text.pdf; using iTextSharp.text.pdf.parser; public class ParsingPDF { static string PDF; static string TEXT2; /** * Parses the PDF using PRTokeniser * @param src the path to the original PDF file * @param dest the path to the resulting text file */ public void parsePdf(String src, String dest) { PdfReader reader = new PdfReader(src); StreamWriter output = new StreamWriter(new FileStream(dest, FileMode.Create)); int pageCount = reader.NumberOfPages; for (int pg = 1; pg <= pageCount; pg++) { // we can inspect the syntax of the imported page byte[] streamBytes = reader.GetPageContent(pg); PRTokeniser tokenizer = new PRTokeniser(streamBytes); while (tokenizer.NextToken()) { if (tokenizer.TokenType == PRTokeniser.TokType.STRING) { output.WriteLine(tokenizer.StringValue); } } } output.Flush(); output.Close(); } /** * Main method. */ static void Main(string[] args) { if (args.Length < 1 || args.Length > 2) { Console.WriteLine("USAGE: ParsePDF infile.pdf <outfile.txt>"); return; } else if (args.Length == 1) { PDF = args[0]; TEXT2 = Path.GetFileNameWithoutExtension(PDF) + ".txt"; } else { PDF = args[0]; TEXT2 = args[1]; } try { DateTime t1 = DateTime.Now; ParsingPDF example = new ParsingPDF(); example.parsePdf(PDF, TEXT2); DateTime t2 = DateTime.Now; TimeSpan ts = t2 - t1; Console.WriteLine("Parsing completed in {0:0.00} seconds.", ts.TotalSeconds); } catch (Exception ex) { Console.WriteLine("ERROR: " + ex.Message); } } // class public class MyTextRenderListener : IRenderListener { /** The print writer to which the information will be written. */ protected StreamWriter output; /** * Creates a RenderListener that will look for text. */ public MyTextRenderListener(StreamWriter output) { this.output = output; } public void BeginTextBlock() { output.Write("<"); } public void EndTextBlock() { output.WriteLine(">"); } public void RenderImage(ImageRenderInfo renderInfo) { } public void RenderText(TextRenderInfo renderInfo) { output.Write("<"); output.Write(renderInfo.GetText()); output.Write(">"); } } // class } // namespace

希望本文所述对大家的C#程序设计有所帮助。