最近做了一个系统需要把文件转换为pdf然后把转换后的pdf合成一个pdf文件，网上搜索了半天，最终决定使用itestsharp.dll配合Aspose.words和Aspose.cells来做，废话少说，上代码……

 #region 文件转换pdfpublic void ConvertImageToPdf(string inputFileName, string outputFileName){Aspose.Words.Document doc = new Aspose.Words.Document();DocumentBuilder builder = new DocumentBuilder(doc);using (System.Drawing.Image image = System.Drawing.Image.FromFile(inputFileName)){FrameDimension dimension = new FrameDimension(image.FrameDimensionsList[0]);int framesCount = image.GetFrameCount(dimension);for (int frameIdx = 0; frameIdx < framesCount; frameIdx++){if (frameIdx != 0)builder.InsertBreak(BreakType.SectionBreakNewPage);image.SelectActiveFrame(dimension, frameIdx);Aspose.Words.PageSetup ps = builder.PageSetup;if (image.Width > 2000){ps.PageWidth = ConvertUtil.PixelToPoint(image.Width / 2, image.HorizontalResolution);ps.PageHeight = ConvertUtil.PixelToPoint(image.Height / 2, image.VerticalResolution);}else{ps.PageWidth = ConvertUtil.PixelToPoint(image.Width-300, image.HorizontalResolution);ps.PageHeight = ConvertUtil.PixelToPoint(image.Height-100, image.VerticalResolution);}builder.InsertImage(image, RelativeHorizontalPosition.Page,100, RelativeVerticalPosition.Page, 0, ps.PageWidth, ps.PageHeight, WrapType.Inline);}}doc.Save(outputFileName);}//Word转换成pdf/// <summary>/// 把Word文件转换成为PDF格式文件/// </summary>/// <param name="sourcePath">源文件路径</param>/// <param name="targetPath">目标文件路径</param> /// <returns>true=转换成功</returns>public bool DOCConvertToPDF(string sourcePath, string targetPath){try{Aspose.Words.Document doc = new Aspose.Words.Document(sourcePath);doc.Save(targetPath, Aspose.Words.SaveFormat.Pdf);return true;}catch (Exception ex){return false;}}/// <summary>/// 把Excel文件转换成PDF格式文件/// </summary>/// <param name="sourcePath">源文件路径</param>/// <param name="targetPath">目标文件路径</param>/// <returns>true=转换成功</returns>public bool XLSConvertToPDF(string sourcePath, string targetPath){try{Workbook workbook = new Workbook(sourcePath);workbook.CreateStyle();workbook.Save(targetPath, Aspose.Cells.SaveFormat.Pdf);                  return true;}catch (Exception ex){return false;}}/// <summary>/// txt转pdf/// </summary>/// <param name="sourcePath"></param>/// <param name="targetPath"></param>/// <returns></returns>public bool TxtConvertToPDF(string sourcePath, string targetPath){try{StreamReader reader = new StreamReader(sourcePath, Encoding.Default); //使用默认编码，否则转换后乱码string text = reader.ReadToEnd();Aspose.Words.Document doc = new Aspose.Words.Document();Aspose.Words.DocumentBuilder builder = new DocumentBuilder(doc);builder.Write(text);doc.Save(targetPath, Aspose.Words.SaveFormat.Pdf);reader.Close();return true;}catch (Exception ex){return false;}}//Word转换成pdf/// <summary>/// 把Word文件转换成为PDF格式文件/// </summary>/// <param name="sourcePath">源文件路径</param>/// <param name="targetPath">目标文件路径</param> /// <returns>true=转换成功</returns>public bool ConvertCebToPdf(string sourcePath, string targetPath){try{Aspose.Words.Document doc = new Aspose.Words.Document(sourcePath);doc.Save(targetPath, Aspose.Words.SaveFormat.Pdf);return true;}catch (Exception ex){return false;}}#endregion

<p>/// <summary>/// 合并pdf/// </summary>/// <param name="fileList">pdf路径集合</param>/// <param name="outMergeFile"></param>public void mergePDFFiles(List<string> fileList, string outMergeFile, string headerText){iTextSharp.text.Document document = new iTextSharp.text.Document(iTextSharp.text.PageSize.A4, 25, 25, 25, 25);  try{PdfWriter instance = PdfWriter.GetInstance(document, new FileStream(outMergeFile, FileMode.Create));document.Open();PdfContentByte directContent = instance.DirectContent;BaseFont baseFont = BaseFont.CreateFont(@"C:\Windows\Fonts\simsun.ttc,0", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);#region 目录{document.Add(new iTextSharp.text.Paragraph("\r\r\r"));</p><p>                    iTextSharp.text.Paragraph p1 = new iTextSharp.text.Paragraph(new Phrase(headerText, new iTextSharp.text.Font(baseFont)));p1.Alignment = iTextSharp.text.Rectangle.ALIGN_CENTER;  //居中document.Add(p1);document.Add(new iTextSharp.text.Paragraph("\r\r"));int num = 2;for (int i = 0; i < fileList.Count; i++){PdfReader pdfReader = new PdfReader(fileList[i].Split('$')[0]);int numberOfPages = pdfReader.NumberOfPages;string text = string.Format("{0}. {1}{2}\n\n", (i + 1), fileList[i].Split('$')[2].PadRight((80 - fileList[i].Split('$')[2].Length), '.'), num);iTextSharp.text.Anchor anchor = new iTextSharp.text.Anchor(text, new iTextSharp.text.Font(baseFont));anchor.Reference = "#link" + i;document.Add(anchor);num += numberOfPages;}/*for (int i = 0; i < fileList.Count; i++){PdfReader pdfReader = new PdfReader(fileList[i].Split('$')[0]);string text = string.Format("{0}. {1}\n\n", (i + 1), fileList[i].Split('$')[2]);iTextSharp.text.Anchor anchor = new iTextSharp.text.Anchor(text, new iTextSharp.text.Font(baseFont));anchor.Reference = "#link" + i;document.Add(anchor);}*/</p><p>                }#endregion</p><p>                #region 页码{iTextSharp.text.HeaderFooter footer = new iTextSharp.text.HeaderFooter(new iTextSharp.text.Phrase("Page:"), true);footer.Border = iTextSharp.text.Rectangle.TITLE;document.Footer = footer;}#endregion</p><p>                #region 文件合并int nn = 0;for (int i = 0; i < fileList.Count; i++){document.NewPage();PdfReader pdfReader = new PdfReader(fileList[i].Split('$')[0]);//添加锚点Anchor anchor = new Anchor((i + 1) + "、 " + fileList[i].Split('$')[2] + "\n\n", new iTextSharp.text.Font(baseFont));anchor.Name = "link" + i;document.Add(anchor);</p><p>                    int numberOfPages = pdfReader.NumberOfPages;for (int j = 1; j <= numberOfPages; j++){if (nn == numberOfPages)document.NewPage();PdfImportedPage importedPage = instance.GetImportedPage(pdfReader, j);directContent.AddTemplate(importedPage, 0f, 0f);nn = numberOfPages;}</p><p>                }#endregiondocument.Close();}catch (Exception ex){document.Close();}}</p>