C# convert PDF to image format

The solution generally is provided by 3rd party component. In many cases it is not free. E.g., PDFRasterizer.NET component, PDF4NET etc.

Here's one solution: http://www.mobileread.com/forums/showthread.php?t=10137

The GFL SDK/GFLAx (http://www.xnview.com/en/gfl.html) free library component can be used to convert PDF to image format. It works for ASP, VB, C# etc. GhostScript (http://sourceforge.net/projects/ghostscript/) is required for it to work.

Example code in C#:

{
       string file = "D:/test.pdf";
       string image = "D:\\test.png";

       try
       {
           GflAx.GflAxClass g = new GflAx.GflAxClass();
           g.EpsDpi = 150;
           g.Page = 1;
           g.LoadBitmap(file);
           g.SaveFormat = GflAx.AX_SaveFormats.AX_PNG;
           g.SaveBitmap(image);
           MessageBox.Show(this, "PDF to PNG conversion ended");
       }
       catch (Exception ex) {
           MessageBox.Show(this, "GflAx error: " + ex.Message);
       }
}