利用Aspose文档转图片

通过使用Aspose您可以轻松的将您的文档转换成真正的图片格式,最好的保证您的内容将实际可见,与其他格式相比,它并不存在查看工具的安装问题。

准备工作：

1:下载Aspose组件包：http://download.csdn.net/detail/laoge/6931819

编写代码：

核心代码AsposeFileToImg，以下代码在文档页数超过100以上生成会变慢，页数越大生成越慢，在实际使用中请注意。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Reflection;
using System.Threading;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Diagnostics;
using Aspose.Cells;

namespace PdfOrImg
{
    /// <summary>
    /// 功能：
    /// pdf,doc,docx,ppt,pptx,xls,xlsx文件转图片
    /// 在当前文件下创建一个以文件名命名的文件夹，该文件夹的保存的是该文件生成是页图片
    /// </summary>
    public class AsposeFileToImg
    {
        private static string imageDirectoryPath = "";
        public static void FileToImg(string filePath)
        {
            if (File.Exists(filePath))
            {
                FileInfo pdfFi = new FileInfo(filePath);
                string filename = pdfFi.Name.Replace(pdfFi.Extension, "");
                imageDirectoryPath = System.IO.Path.Combine(pdfFi.DirectoryName, filename);
                if (!Directory.Exists(imageDirectoryPath))
                {
                    Directory.CreateDirectory(imageDirectoryPath);
                }
                string a = Path.GetExtension(filePath).ToLower();
                if (a == ".pdf")
                {
                    PdfToImg(filePath);
                }
                else
                {
                    if (a == ".doc" || a == ".docx")
                    {
                        DocToImg(filePath);
                    }
                    else
                    {
                        if (a == ".ppt")
                        {
                            PptToImg(filePath);
                        }
                        else if (a == ".pptx")
                        {
                            PptxToImg(filePath);
                        }
                        else
                        {
                            if (a == ".xls" || a == ".xlsx")
                            {
                                XlsToImg(filePath);
                            }
                        }
                    }
                }
            }
        }
        private static void PdfToImg(string filePath)
        {
            string filename = Path.GetFileNameWithoutExtension(filePath).ToLower();
            FileStream docStream = new FileStream(filePath, FileMode.Open);
            var pdf = new Aspose.Pdf.Document(docStream);
            for (int i = 1; i < pdf.Pages.Count + 1; i++)
            {
                try
                {
                    string imgpath = imageDirectoryPath + "/" + filename + "_" + i + ".jpg";
                    if (!File.Exists(imgpath))
                    {
                        using (FileStream imageStream = new FileStream(imgpath, FileMode.Create))
                        {
                            Aspose.Pdf.Devices.Resolution resolution = new Aspose.Pdf.Devices.Resolution(300);
                            Aspose.Pdf.Devices.JpegDevice jpegDevice = new Aspose.Pdf.Devices.JpegDevice(resolution, 100);

                            jpegDevice.Process(pdf.Pages[i], imageStream);
                            imageStream.Close();
                        }
                    }
                }
                catch (Exception)
                {

                }
            }
        }
        private static void DocToImg(string filePath)
        {
            string filename = Path.GetFileNameWithoutExtension(filePath).ToLower();
            var words = new Aspose.Words.Document(filePath);

            Aspose.Words.Saving.ImageSaveOptions imageSaveOptions =
                   new Aspose.Words.Saving.ImageSaveOptions(Aspose.Words.SaveFormat.Jpeg);
            imageSaveOptions.Resolution = 128;

            int pageindex = 0;
            int pagecount = words.PageCount;
            for (int i = 1; i < pagecount + 1; i++)
            {
                try
                {
                    string imgpath = imageDirectoryPath + "/" + filename + "_" + i + ".jpg";
                    if (!File.Exists(imgpath))
                    {
                        imageSaveOptions.PageIndex = pageindex;
                        words.Save(imgpath, imageSaveOptions);
                        pageindex++;
                    }
                }
                catch (Exception)
                {

                }
            }
        }
        private static void PptToImg(string filePath)
        {
            string filename = Path.GetFileNameWithoutExtension(filePath).ToLower();
            var ppt = new Aspose.Slides.Presentation(filePath);
            string imgpath = imageDirectoryPath + "/" + filename + ".pdf";
            if (!File.Exists(imgpath))
            {
                ppt.Save(imgpath, Aspose.Slides.Export.SaveFormat.Pdf);
            }
            PdfToImg(imgpath);
        }
        private static void PptxToImg(string filePath)
        {
            string filename = Path.GetFileNameWithoutExtension(filePath).ToLower();
            var ppt = new Aspose.Slides.Pptx.PresentationEx(filePath);
            string imgpath = imageDirectoryPath + "/" + filename + ".pdf";
            if (!File.Exists(imgpath))
            {
                ppt.Save(imgpath, Aspose.Slides.Export.SaveFormat.Pdf);
            }
            PdfToImg(imgpath);
        }
        private static void XlsToImg(string filePath)
        {
            string filename = Path.GetFileNameWithoutExtension(filePath).ToLower();
            Workbook book = new Workbook(filePath);
            //创建一个图表选项的对象
            Aspose.Cells.Rendering.ImageOrPrintOptions imgOptions = new Aspose.Cells.Rendering.ImageOrPrintOptions();
            imgOptions.ImageFormat = ImageFormat.Jpeg;
            int count = book.Worksheets.Count;
            for (int i = 0; i < count; i++)
            {
                //获取一张工作表
                Worksheet sheet = book.Worksheets[i];
                //创建一个纸张底色渲染对象
                Aspose.Cells.Rendering.SheetRender sr = new Aspose.Cells.Rendering.SheetRender(sheet, imgOptions);
                for (int j = 0; j < sr.PageCount; j++)
                {
                    string imgpath = imageDirectoryPath + "/" + filename + "_" + i + "_" + j + "_.jpg";
                    if (!File.Exists(imgpath))
                    {
                        sr.ToImage(j, imgpath);
                    }
                }
            }
        }
    }
}

调用代码：

using System;
using System.IO;
using System.Collections;

namespace PdfOrImg
{
    //Adobe Acrobat9.0
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("========文件转图片开始========");
            try
            {

                ArrayList alist = new ArrayList();
                alist.Add("temp_pdf.pdf");

                alist.Add("temp_ppt.ppt");
                alist.Add("temp_pptx.pptx");

                alist.Add("temp_doc.doc");
                alist.Add("temp_docx.docx");

                alist.Add("temp_xls.xls");
                alist.Add("temp_xlsx.xlsx");

                for (int i = 0; i < alist.Count; i++)
                {
                    try
                    {
                        string pdfFilePath = alist[i].ToString();
                        FileInfo pdfFi = new FileInfo(pdfFilePath);
                        string filepath = pdfFi.FullName;

                        Console.WriteLine("正在转换" + pdfFilePath + "文件...");
                        AsposeFileToImg.FileToImg(filepath);
                    }
                    catch (Exception)
                    {

                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            Console.WriteLine("========文件转图片结束========");
            Console.Read();

        }

    }
}

运行情况：

根据文档名称建立同名的文件夹，并在文件夹中存放文档每一页的图片，图片命名格式：文件名_页码.jpg 效果如下：

获取代码：

http://download.csdn.net/detail/luomingui/9151083