现在我把一个pdf的文件转化成txt格式了
 private void btnget_Click(object sender, EventArgs e)
        {
            OpenFileDialog op = new OpenFileDialog();
            if (op.ShowDialog() == DialogResult.OK)
            {
                txtpath.Text = op.FileName;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            PDDocument doc = PDDocument.load(txtpath.Text.Trim());
            PDFTextStripper str = new PDFTextStripper();
            string text = str.getText(doc);
            FileInfo textfile = new FileInfo(txtpath.Text.Trim() + ".txt");
            StreamWriter st = new StreamWriter(textfile.FullName, false, Encoding.GetEncoding("gb2312"));
            st.Write(text);
            st.Close();
        }
但是现在我把txt转化回pdf格式显示时说解码错误，求大神用代码帮我解决下！

没人我自己坐下沙发，等大神

趁着做沙发的时间我把txt文档转成pdf了
   private void button2_Click(object sender, EventArgs e)
        {
            FileInfo fi = new FileInfo(txtpath.Text.Trim() + ".txt");
            StreamReader sr = fi.OpenText();
            string savetxt = sr.ReadToEnd();
            sr.Close();
            Document doc = new Document(PageSize.A4);
            string name = txtpath.Text.Trim() + ".txt" + ".pdf";
            PdfWriter wr = PdfWriter.GetInstance(doc, new FileStream(name,FileMode.Create));
            doc.Open();
            doc.Add(new Paragraph(savetxt));
            doc.Close();
            axAcroPDF1.LoadFile(txtpath.Text.Trim() + ".txt" + ".pdf");
        }
但是出现的确实txt里面的文档不是原来pdf的东西，求解释，求改进！

还没大牛来么，沙发都快自己坐完了

没有大神对这个有兴趣的么?

我還是個學生，這C#我也就剛剛學習，自己摸索，對於你說的vfp我也有興趣，不過那個衹能等放暑假自己學習，到時候有問題請教你！