Sample code · C#
using System; using System.IO; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Microsoft.AspNetCore.Mvc; using Microsoft.AspNetCore.Mvc.RazorPages; using SelectPdf.Universal; namespace SelectPdf.Samples.Pages { public class PdfSplitModel : PageModel { public void OnGet() { } public IActionResult OnPost() { // the initial file string file1 = Path.Combine(Startup.ServerPath, "wwwroot", "files", "doc.pdf"); // load the pdf document PdfDocument doc1 = new PdfDocument(file1); // create a new pdf document PdfDocument doc = new PdfDocument(); // add 2 pages to the new document if (doc1.Pages.Count > 2) { doc.AddPage(doc1.Pages[1]); doc.AddPage(doc1.Pages[2]); } // save pdf document byte[] pdf = doc.Save(); // close pdf document doc.Close(); // return resulted pdf document FileResult fileResult = new FileContentResult(pdf, "application/pdf"); fileResult.FileDownloadName = "Document.pdf"; return fileResult; } } }