/// <summary> /// 将PDF文档转换为图片的方法 /// </summary> /// <param name=”pdfInputPath”>PDF文件路径</param> /// <param name=”imageOutputPath”>图片输出路径</param> /// <param name=”imageName”>生成图片的名字</param> /// <param name=”startPageNum”>从PDF文档的第几页开始转换</param> /// <param name=”endPageNum”>从PDF文档的第几页开始停止转换</param> /// <param name=”imageFormat”>设置所需图片格式</param> /// <param name=”definition”>设置图片的清晰度，数字越大越清晰</param> public BookInfoViewModel PdfToImages(string pdfInputPath, string imageOutputPath, string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, PdfToPicture.ImageQuality definition, BookInfoViewModel BookInfoViewmodel) { int imgVerticalResolution = Convert.ToInt32(Settings.imgVerticalResolution); //var pdfFile = PDFFile.Open(pdfInputPath);
//if (!Directory.Exists(imageOutputPath)) //{ // Directory.CreateDirectory(imageOutputPath); //}
//// validate pageNum //if (startPageNum <= 0) //{ // startPageNum = 1; //}
//if (endPageNum > pdfFile.PageCount) //{ // endPageNum = pdfFile.PageCount; //}
//if (startPageNum > endPageNum) //{ // int tempPageNum = startPageNum; // startPageNum = endPageNum; // endPageNum = tempPageNum; //} //BookInfoViewmodel.PageNoCount = pdfFile.PageCount; //BookInfoViewmodel.BookPdfToImgInfoModelList = new List<BookInfoViewModel.BookPdfToImgInfoModel>(); //for (int i = startPageNum; i <= endPageNum; i++) //{ // BookInfoViewModel.BookPdfToImgInfoModel BookPdfToImgInfomodel = new BookInfoViewModel.BookPdfToImgInfoModel(); // var pageImage = pdfFile.GetPageImage(i – 1, 96 * (int)definition); // int Width = pageImage.Width; // int Height = pageImage.Height; // if (i == startPageNum) // { // BookInfoViewmodel.FileDimension = Width + “*” + Height; // } // BookPdfToImgInfomodel.ImgFileDimension = Width + “*” + Height; // BookPdfToImgInfomodel.ImgFileExtension = imageFormat.ToString(); // BookPdfToImgInfomodel.ImgFileName = imageName + “_” + i.ToString(); // BookPdfToImgInfomodel.ImgFileNo = Convert.ToInt32(Session[“PageCount”]) + i; // pageImage.Save(imageOutputPath + “/” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), imageFormat); // pageImage.Dispose(); // //string sourcePdfFilePath = pdfInputPath;
// //將上傳的圖片重新命名 // //var destFile = GetFilePath(pdfInputPath); // //System.IO.File.Copy(pdfInputPath, destFile, true); // //切割pdf // //GhostscriptWrapper.GeneratePageThumb(destFile, imageOutputPath + “/” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), 1, 150, 150); // //刪除複製的文件 // //System.IO.File.Delete(destFile);
// //生成小图 // CompressionImage.generateImage(imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), imageOutputPath, “S_” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), 150, 150); // //生成中图 // if (Width > 850) // { // CompressionImage.generateImage(imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), imageOutputPath, “M_” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), 850, 99999); // } // else // { // System.IO.File.Copy(Path.Combine(imageOutputPath, imageName + “_” + i.ToString() + “.” + imageFormat.ToString()), Path.Combine(imageOutputPath, “M_” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString())); // } // //获取图片的大小 // FileInfo file = new FileInfo(imageOutputPath + “/” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString()); // BookPdfToImgInfomodel.ImgFileSize = file.Length; // BookInfoViewmodel.BookPdfToImgInfoModelList.Add(BookPdfToImgInfomodel);
//} //Session[“PageCount”] = Convert.ToInt32(Session[“PageCount”]) + 1; //pdfFile.Dispose();
var destFile = GetFilePath(pdfInputPath); System.IO.File.Copy(pdfInputPath, destFile, true); try { //和选择的文件并列创建一个目录 string directoryPath = imageOutputPath;
//定义Jpeg转换设备 Aspose.Pdf.Document document = new Aspose.Pdf.Document(destFile); var device = new Aspose.Pdf.Devices.JpegDevice(); int quality = 100; // directoryPath += quality; if (!System.IO.Directory.Exists(directoryPath)) { Directory.CreateDirectory(directoryPath); } //默认质量为100，设置质量的好坏与处理速度不成正比，甚至是设置的质量越低反而花的时间越长，怀疑处理过程是先生成高质量的再压缩 //device = new Aspose.Pdf.Devices.JpegDevice(quality); //device = new Aspose.Pdf.Devices.JpegDevice(1,, quality,); //遍历每一页转为jpg endPageNum = 1; BookInfoViewmodel.BookPdfToImgInfoModelList = new List<BookInfoViewModel.BookPdfToImgInfoModel>(); BookInfoViewmodel.PageNoCount = document.Pages.Count; for (var i = 1; i <= endPageNum; i++) { string filePathOutPut = Path.Combine(directoryPath, string.Format(“{0}_{1}.{2}”, imageName, i.ToString(), imageFormat.ToString())); FileStream fs = new FileStream(filePathOutPut, FileMode.OpenOrCreate); try { BookInfoViewModel.BookPdfToImgInfoModel BookPdfToImgInfomodel = new BookInfoViewModel.BookPdfToImgInfoModel(); BookPdfToImgInfomodel.ImgFileExtension = imageFormat.ToString(); BookPdfToImgInfomodel.ImgFileName = imageName + “_” + i.ToString(); BookPdfToImgInfomodel.ImgFileNo = Convert.ToInt32(Session[“PageCount”]) + i; BookPdfToImgInfomodel.ImgFileSize = fs.Length; BookInfoViewmodel.BookPdfToImgInfoModelList.Add(BookPdfToImgInfomodel);
//var pdfFile = PDFFile.Open(pdfInputPath); //var pageImage = pdfFile.GetPageImage(i – 1, imgVerticalResolution * (int)definition);//设置分辨率为96dpi int Width = 0; int Height = 0; //設置生成圖片的分辨率 Aspose.Pdf.Devices.Resolution pdfResolution = new Aspose.Pdf.Devices.Resolution(imgVerticalResolution, imgVerticalResolution); //pdfResolution.X = 96; //pdfResolution.Y = 96; //默认质量为100，设置质量的好坏与处理速度不成正比，甚至是设置的质量越低反而花的时间越长，怀疑处理过程是先生成高质量的再压缩 //device = new Aspose.Pdf.Devices.JpegDevice(quality); device = new Aspose.Pdf.Devices.JpegDevice(Width, Height, pdfResolution, quality); device.Process(document.Pages[i], fs); fs.Close(); //pageImage.Dispose(); //pdfFile.Dispose(); //BookInfoViewmodel.FileDimension = Width + “*” + Height;
DirectoryInfo folder = new DirectoryInfo(imageOutputPath); int pdffileount = 0; foreach (FileInfo pdffile in folder.GetFiles()) { if (pdffileount == 0) { if (pdffile.Extension.Substring(1, pdffile.Extension.Length – 1) == imageFormat.ToString()) { Image newImage = Image.FromFile(pdffile.FullName); Width = newImage.Width; Height = newImage.Height; pdffileount++; newImage.Dispose(); } }
} BookInfoViewmodel.FileDimension = Width + “*” + Height; //生成小图 CompressionImage.generateImage(imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), imageOutputPath, “S_” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), 150, 150); //生成中图 if (Width > 850) { CompressionImage.generateImage(imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), imageOutputPath, “M_” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString(), 850, 99999); } else { System.IO.File.Copy(Path.Combine(imageOutputPath, imageName + “_” + i.ToString() + “.” + imageFormat.ToString()), Path.Combine(imageOutputPath, “M_” + imageName + “_” + i.ToString() + “.” + imageFormat.ToString())); }
} catch (Exception ex) { fs.Close(); System.IO.Directory.Delete(filePathOutPut); } } document.Dispose(); } catch (Exception ex) {
} finally { System.IO.File.Delete(destFile); } return BookInfoViewmodel; }
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