将Word,PDF文档转化为图片

 1 #region 将Word文档转化为图片
 2     /// <summary>
 3     /// 将Word文档转化为图片
 4     /// </summary>
 5     /// <param name="wordpath">需要转换的word文档的全路径</param>
 6     public void Word_Convert2Image(string wordpath)
 7     {
 8         //第一步：将Word文档转化为Pdf文档（中间过程）
 9         Aspose.Words.Document doc = new Aspose.Words.Document(wordpath);
10         //生成的pdf的路径
11         string Pdfpath = Server.MapPath("images") + "Word2Pdf.pdf";
12         doc.Save(Pdfpath, Aspose.Words.SaveFormat.Pdf);  //生成中间文档pdf
13 
14         //第二部：开始把第一步中转化的pdf文档转化为图片
15         int i = 1;
16         Aspose.Pdf.Document pdfDocument = new Aspose.Pdf.Document(Pdfpath);
17         while (i <= pdfDocument.Pages.Count)
18         {
19             if (!string.IsNullOrEmpty(Pdfpath))
20             {
21                 GetImage(Pdfpath, i);
22                 GC.Collect();  //回收内存
23             }
24             i++;
25         }
26         //图片转化完成之后，删除中间过程产生的pdf文档
27         if (File.Exists(Pdfpath))
28             File.Delete(Pdfpath);
29     }
30     #endregion
31     #region 将pdf转化为图片
32     /// <summary>
33     /// 将PDF 相应的页转换为图片
34     /// </summary>
35     /// <param name="strPDFpath">PDF 路径</param>
36     /// <param name="Page">需要转换的页页码</param>
37     private void GetImage(string strPDFpath, int Page)
38     {
39         GC.Collect();
40         string strSavePath = Server.MapPath("images");
41         byte[] ImgData = GetImgData(strPDFpath, Page);
42         MemoryStream ms = new MemoryStream(ImgData, 0, ImgData.Length);
43         Bitmap returnImage = (Bitmap)Bitmap.FromStream(ms);
44         string picName=string.Format("{0}_{1}.jpg", CreatePicName(),Page);
45         string strImgPath = Path.Combine(strSavePath, picName);  //图片名称可在此修改
46         returnImage.Save(strImgPath);
47         returnImage.Dispose();
48         ms.Dispose();
49         AddImage(Page, picName);  //将图片添加到数据库
50     }
51     /// <summary>
52     /// 从PDF中获取首页的图片
53     /// </summary>
54     /// <param name="PDFPath">PDF 文件路径</param>
55     /// <param name="Page">需要获取的第几页</param>
56     /// <returns></returns>
57     private byte[] GetImgData(string PDFPath, int Page)
58     {
59         System.Drawing.Image img = PDFView.ConvertPDF.PDFConvert.GetPageFromPDF(PDFPath, Page, 200, "", true);
60         return GetDataByImg(img);//读取img的数据并返回
61     }
62     /// <summary>
63     /// 将单页的PDF转换为图片
64     /// </summary>
65     /// <param name="_image"></param>
66     /// <returns></returns>
67     private byte[] GetDataByImg(System.Drawing.Image _image)
68     {
69         System.IO.MemoryStream Ms = new MemoryStream();
70         _image.Save(Ms, System.Drawing.Imaging.ImageFormat.Jpeg);
71         byte[] imgdata = new byte[Ms.Length];
72         Ms.Position = 0;
73         Ms.Read(imgdata, 0, Convert.ToInt32(Ms.Length));
74         Ms.Close();
75         return imgdata;
76     }
77     #endregion