c# Pdf 转换图片

1，引入 dll
itextsharp.dll、
PDFView.dll、
把 gsdll32.dll 拷贝在项目 bin目录下，注意：它不能直接引用
直接上代码：
 1  /// <summary>
 2         /// 将PDF 相应的页转换为图片
 3         /// </summary>
 4         /// <param name="strPDFpath">PDF 路径</param>
 5         /// <param name="Page">需要转换的页页码</param>
 6         private string GetImage(string strPDFpath, string imgDire, ImageFormat imgeF)
 7         {
 8             StringBuilder b = new StringBuilder();
 9 
10             PdfReader reader = new PdfReader(strPDFpath);
11             // 获得文档页数
12             int pageCount = reader.NumberOfPages;
13 
14             System.IO.MemoryStream Ms = new MemoryStream();
15 
16             b = b.AppendLine("<ul style='azimuth:center; list-style-type:none;' >");
17 
18             for (int page = 1; page <= pageCount; page++)
19             {
20 
21                 System.Drawing.Image img = PDFView.ConvertPDF.PDFConvert.GetPageFromPDF(strPDFpath, page,90, "", true);
22 
23                 img.Save(Ms, imgeF);
24 
25                 Bitmap returnImage = (Bitmap)Bitmap.FromStream(Ms);
26 
27                 string strImgPath = Request.MapPath("..\\" + imgDire + "\\" + page.ToString("0000") + ".jpg");
28 
29                 returnImage.Save(strImgPath);
30 
31                 Ms.Position = 0;
32 
33 
34                 b = b.AppendLine("<li>  <img src='..\\" + imgDire + "\\" + page.ToString("0000") + ".jpg'  />       </li><span>第" + (page) + "页</span>");
35             }
36 
37             Ms.Close();
38             b = b.AppendLine("</ul>");
39 
40             return b.ToString();
41 
42 
43         }