How to Analyze the First and Last Pages of a Document in DotNet 7

Question

Is there a way to analyze only the first and last pages of a document in my DotNet 7 program? Below is the code I'm currently using, but it is only analyzing the first page and ignoring the rest:

AnalyzeDocumentOperation operation = await client.AnalyzeDocumentFromUriAsync(WaitUntil.Completed, modelId, fileUri, new AnalyzeDocumentOptions() { Pages = { "1", "-1" } });

Answer 1

Thanks for the question, One workaround could be to first determine the total number of pages in your document, and then use that number instead of -1.Here’s an example of how you can determine the number of pages in a PDF file using iTextSharp.

using iTextSharp.text.pdf;

PdfReader pdfReader = new PdfReader(pdfFilePath);

int numberOfPages = pdfReader.NumberOfPages;

Once you have the total number of pages, you can modify your AnalyzeDocumentOptions to analyze the first and last pages like this:

AnalyzeDocumentOperation operation = await client.AnalyzeDocumentFromUriAsync(WaitUntil.Completed, modelId, fileUri, new AnalyzeDocumentOptions() { Pages = { "1", numberOfPages.ToString() } });