How to convert PDF to images using C# and ImageMagick?

Question

I would like to convert a PDF file to .GIF using C# and magicknet.dll. I have added the reference to the MagickNet Dll to my project.

MagickNet.Magick.Init();
MagickNet.Image img = new MagickNet.Image("d:/aa.pdf");
img.Write("d:/bb.gif");
MagickNet.Magick.Term();
img.Dispose();

System.Runtime.InteropServices.SEHException was unhandled by user code
  Message="External component has thrown an exception."
  Source="ImageMagickNET"
  ErrorCode=-2147467259
  StackTrace:
       at Magick.Image.{ctor}(Image* , basic_string\,std::allocator >* )
       at ImageMagickNET.Image..ctor(String imageSpec)
       at Test1._Default.Button1_Click(Object sender, EventArgs e) in C:\Users\PANKAJ\Documents\Visual Studio 2008\Projects\Test1\Test1\Default.aspx.cs:line 31
       at System.Web.UI.WebControls.Button.OnClick(EventArgs e)
       at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
       at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
       at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
       at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  InnerException: 

Answer 1

ImageMagick requires GhostScript to Interpret PDF files. If you want you can call the GhostScript dll directly (contact me via my profile, I will send you a c# wrapper)

Alternatively you can use the GhostScript command line or a commercial 3rd party component, eg the PDF libraries from Tall Components.