Getting Page Count for a Multi-Page PDF file using Illustrator script?

Question

Does anyone know how to get the page count of a multi page PDF file?  I know you can then open each page using the PDFFileOptions (pagetoopen).  But I need to know up front how many pages there are to loop thru to open each page and process each page.
Any Ideas?

Answer 1

This script i did for photoshop:
OK so lets do it working on WIN and MAC without any shell script.
This solution is not the best but its working.
I used Try catch to solve it.
Only issue is that you should at least somehow know how many pages you expect in pdf.. this mean if you are working with books or flyers...
Then set the maxPagesCount to that number.
I am working with pdfs with max 20pages.. so i start open the 20 then 19 then 18 and when i am success i know the amount of pages.
Its not the quicker way but its usable.
var maxPagesCount = 20;
var actPagesCount = maxPagesCount;
var opts1 = new PDFOpenOptions();
opts1.usePageNumber = true;
opts1.antiAlias = true;
opts1.bitsPerChannel = BitsPerChannelType.EIGHT;
opts1.resolution = 10; //it will load faster the test page
opts1.suppressWarnings = true;
opts1.cropPage = CropToType.MEDIABOX;
myFunction = function () {
  try { 
      app.displayDialogs = DialogModes.NO;
      var fileList = openDialog();
      for (i = 0; i < fileList.length; i++) {
        actPagesCount = maxPagesCount;
        getPagesCount(fileList[i],maxPagesCount);
        alert(actPagesCount);
  } catch (exception) { 
    alert(exception);
getPagesCount = function (checkFile, lastPageID) {
  try {          
    for (var checkPage = lastPageID; checkPage > 0; checkPage--) {
      opts1.page = checkPage;                    
      var docRef = open(checkFile, opts1, false);                  
      docRef.close(SaveOptions.DONOTSAVECHANGES);                  
      actPagesCount = lastPageID;                  
      return;                  
      checkPage=0;                              
  } catch (exception) {
    // Look for next page        
    checkPage--;        
    getPagesCount(checkFile,checkPage);