我在以前的项目中做过这个.我们使用了 ImageMagick.NET，它可能是最伟大的开源图像处理 API 的包装器，ImageMagick>

http://imagemagick.codeplex.com/

Looking for solution to convert a specified page of a pdf file to a bitmap image.

I did this in a previous project. We used ImageMagick.NET which is a wrapper of perhaps the greatest open source image manipulation API there is, ImageMagick

http://imagemagick.codeplex.com/