将Word,PDF文档转化为图片

 #region 将Word文档转化为图片
     /// <summary>
     /// 将Word文档转化为图片
     /// </summary>
     /// <param name="wordpath">需要转换的word文档的全路径</param>
     public void Word_Convert2Image(string wordpath)
     {
         //第一步：将Word文档转化为Pdf文档（中间过程）
         Aspose.Words.Document doc = new Aspose.Words.Document(wordpath);
         //生成的pdf的路径
         string Pdfpath = Server.MapPath("images") + "Word2Pdf.pdf";
         doc.Save(Pdfpath, Aspose.Words.SaveFormat.Pdf);  //生成中间文档pdf

         //第二部：开始把第一步中转化的pdf文档转化为图片
         int i = ;
         Aspose.Pdf.Document pdfDocument = new Aspose.Pdf.Document(Pdfpath);
         while (i <= pdfDocument.Pages.Count)
         {
             if (!string.IsNullOrEmpty(Pdfpath))
             {
                 GetImage(Pdfpath, i);
                 GC.Collect();  //回收内存
             }
             i++;
         }
         //图片转化完成之后，删除中间过程产生的pdf文档
         if (File.Exists(Pdfpath))
             File.Delete(Pdfpath);
     }
     #endregion
     #region 将pdf转化为图片
     /// <summary>
     /// 将PDF 相应的页转换为图片
     /// </summary>
     /// <param name="strPDFpath">PDF 路径</param>
     /// <param name="Page">需要转换的页页码</param>
     private void GetImage(string strPDFpath, int Page)
     {
         GC.Collect();
         string strSavePath = Server.MapPath("images");
         byte[] ImgData = GetImgData(strPDFpath, Page);
         MemoryStream ms = new MemoryStream(ImgData, , ImgData.Length);
         Bitmap returnImage = (Bitmap)Bitmap.FromStream(ms);
         string picName=string.Format("{0}_{1}.jpg", CreatePicName(),Page);
         string strImgPath = Path.Combine(strSavePath, picName);  //图片名称可在此修改
         returnImage.Save(strImgPath);
         returnImage.Dispose();
         ms.Dispose();
         AddImage(Page, picName);  //将图片添加到数据库
     }
     /// <summary>
     /// 从PDF中获取首页的图片
     /// </summary>
     /// <param name="PDFPath">PDF 文件路径</param>
     /// <param name="Page">需要获取的第几页</param>
     /// <returns></returns>
     private byte[] GetImgData(string PDFPath, int Page)
     {
         System.Drawing.Image img = PDFView.ConvertPDF.PDFConvert.GetPageFromPDF(PDFPath, Page, , "", true);
         return GetDataByImg(img);//读取img的数据并返回
     }
     /// <summary>
     /// 将单页的PDF转换为图片
     /// </summary>
     /// <param name="_image"></param>
     /// <returns></returns>
     private byte[] GetDataByImg(System.Drawing.Image _image)
     {
         System.IO.MemoryStream Ms = new MemoryStream();
         _image.Save(Ms, System.Drawing.Imaging.ImageFormat.Jpeg);
         byte[] imgdata = new byte[Ms.Length];
         Ms.Position = ;
         Ms.Read(imgdata, , Convert.ToInt32(Ms.Length));
         Ms.Close();
         return imgdata;
     }
     #endregion