Insert pages from a single document multiple times

Question

I'm trying to create a simple program that I can use to display PDF files that I can use to play at the piano. I perform often, and need to create "play lists" from which I can pull all, or part of, a PDF file containing music and display it.
I have it all working, except for one problem. I may need to "repeat" a section of a piece. I'm building up the play list by calling AcroPDDoc.InsertPages for each item in the play list. If a PDF file appears multiple times in the play list, when I call InsertPages, the call fails.
In this code snippet, pdDoc is the main doc to which I'm adding pages. playList is a generic List of my own PlayList objects, and I need to iterate through all the items in the playList except the first one, which is already loaded.
This code works great unless the fileName I specify has already been opened. The call to AcroPDDoc.Open succeeds just fine, but the call to pdDoc.InsertPages fails if the file has already had pages from it inserted. All other documents work fine. The documentation, of course, doesn't mention this.
        int insertPage = pdDoc.GetNumPages() - 1;
        for (int i = 1; i < playList.Count; i++)
          var newDoc = new AcroPDDoc();
          var item = playList(i);
          int startPage = 0;
          int endPage = 0;
          if (newDoc.Open(item.fileName))
            startPage = Math.Max(0, item.startPage);
            endPage = Math.Max(0, item.endPage);
            var totalPages = newDoc.GetNumPages;
            if (item.endPage < 0 || item.endPage > totalPages)
              endPage = totalPages - 1;
            int numPages = (endPage - startPage) + 1;
            if (pdDoc.InsertPages(insertPage, newDoc, startPage, numPages, 0))
              insertPage += numPages;
So, the questions:
1.) Is it possible to load pages from a single document multiple times?
2.) Is there a better way to do this? (That is, loop through a list of file names, starting and ending page numbers, and add the documents to an existing document.)
Any help appreciated! Thanks -- Ken

Answer 1

Hi Ken,
>The documentation, of course, doesn't mention this.
The documentation does not state explicitly that you can't insert pages again from a PDDoc you open again and never close.
But it mentions that you get references only from an already opened PDDoc.
"...Opens the specified document. If the document is already open, it returns a reference to the already opened PDDoc. You must call PDDocClose() once for every successful open..."
It doesn't state that you can't insert pages from a referenced PDDoc but it seems so.
I would close the PDDoc within your for-loop after inserting pages and release newDoc.
Regards
Norbert