/// <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 static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath, string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, Definition definition) { FileStream fs = new FileStream(pdfInputPath, FileMode.Open); TallComponents.PDF.Rasterizer.Document doc = new TallComponents.PDF.Rasterizer.Document(fs); if (!Directory.Exists(imageOutputPath)) { Directory.CreateDirectory(imageOutputPath); } // validate pageNum if (startPageNum <= 0) { startPageNum = 1; } if (endPageNum > doc.Pages.Count) { endPageNum = doc.Pages.Count; } if (startPageNum > endPageNum) { int tempPageNum = startPageNum; startPageNum = endPageNum; endPageNum = startPageNum; } // start to convert each page for (int i = startPageNum; i <= endPageNum; i++) { using (FileStream fs1 = File.Create(imageOutputPath + @"~temp" + i + ".tmp")) { TallComponents.PDF.Rasterizer.ConvertToTiffOptions option = new TallComponents.PDF.Rasterizer.ConvertToTiffOptions(); doc.Pages[i].ConvertToTiff(fs1, option); System.Drawing.Image img = System.Drawing.Image.FromStream(fs1); img.Save(imageOutputPath + imageName + i.ToString() + "." + imageFormat.ToString(), imageFormat); } File.Delete(imageOutputPath + @"~temp" + i + ".tmp"); } fs.Dispose(); }