How can I convert the pdf to excel with all the pages?
Cause my pdf have 15 pages but when I convert it to excel or extracting it to text it only extract 1-4 pages
This can be a limitation when using Aspose.PDF API in evaluation mode (without a valid license to be set in code prior to processing your code snippet). Please note that in evaluation mode, you can only process the first four pages of a document. That might be the reason that only four pages are being rendered in the output file.
If you want to test Aspose.PDF without the evaluation version limitations, you can request a 30-day Temporary License. Please refer to How to get a Temporary License?. See the licensing document for your reference.