使用 iTextSharp 从 PDF 文档获取内容

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            ExtractTextFromPDFPage("c:\sample.pdf", 1);
        }

        public void ExtractTextFromPDFPage(string pdfFile, int pageNumber)
        {
            PdfReader reader = new PdfReader(pdfFile);
            string text = PdfTextExtractor.GetTextFromPage(reader, pageNumber);
            try { reader.Close(); }
            catch { }
            richTextBox1.Text = text;
        }
    }
}