How to use Ghostscript for converting PDF to Image

Question

I found that Ghostscript is able to convert PDF to Image format.

I tried PDF to Image Converter but not able to understand it clearly.

I have installed gs905w64.exe but when I tried to add reference to my web application I am getting this error.

A reference to gsdll32.dll could not be added. No type libraries were found in the component.

Answer 1

You Do not need to add any DLL reference to your project. First download the gs910w32.exe application file then install it to your local computer. Get the location of the installed .exe file eg:-

"C:\Program Files (x86)\gs\gs8.64\bin\gswin32.exe"

use it in your C# application as :

 
  private void PdfToJpg(string inputPDFFile, string outputImagesPath)
        {
            string ghostScriptPath = @"C:\Program Files (x86)\gs\gs8.64\bin\gswin32.exe";
            String ars = "-dNOPAUSE -sDEVICE=jpeg -r102.4 -o" + outputImagesPath + "%d.jpg -sPAPERSIZE=a4 " + inputPDFFile;
            Process proc = new Process();
            proc.StartInfo.FileName = ghostScriptPath;
            proc.StartInfo.Arguments = ars;
            proc.StartInfo.CreateNoWindow = true;
            proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            proc.Start();
            proc.WaitForExit();
        }
 

IF your input PDF file name has any spaces, you need to change the argument to

 
String ars = "-dNOPAUSE -sDEVICE=jpeg -r102.4 -o" + outputImagesPath + "%d.jpg -sPAPERSIZE=a4 " +"\"" + inputPDFFile + "\"";
 

you can specify the output image's aspect ratio in the argument with the -r flag. If you use "-r300" the width of the image will be 3000 pixel and height will change accordingly, from the above argument you will get 1024 to 768 size jpg image.