SelectPdf for .NET 10 - Conversion Delay with Html to Pdf Converter - C# / .NET 10 Sample

This sample shows how the html to pdf converter can be used to convert a web page to pdf using SelectPdf Pdf Library for .NET.

For pages that use javascripts heavily, the conversion can be delayed a number of seconds using converter.Options.ConversionDelay property to allow the content to be fully rendered.

In a similar way, if a page takes too much time to load, the converter can specify the amount of time in seconds when the page load will timeout using the property converter.Options.NavigationTimeout.

Url:

Rendering Engine:

Delay conversion:
seconds

Page timeout:
seconds

Sample code · C#

using System;
using System.Collections.Generic;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using SelectPdf.Universal;

namespace SelectPdf.Samples.Pages
{
    public class ConversionDelayModel : PageModel
    {
        public void OnGet()
        {
            DdlRenderingEngine = "Chromium";
        }

        [BindProperty]
        public string TxtUrl { get; set; }

        [BindProperty]
        public string DdlRenderingEngine { get; set; } = "Chromium";

        public List<SelectListItem> RenderingEngines { get; } = new List<SelectListItem>
        {
            new SelectListItem { Value = "Chromium", Text = "Chromium" },
        };

        [BindProperty]
        public int delay { get; set; }

        [BindProperty]
        public int timeout { get; set; }

        public IActionResult OnPost()
        {
            RenderingEngine renderingEngine =
                SampleForm.ParseEnum(DdlRenderingEngine, RenderingEngine.Chromium);

            // instantiate a html to pdf converter object
            HtmlToPdf converter = new HtmlToPdf();

            // specify the number of seconds the conversion is delayed
            converter.Options.RenderingEngine = renderingEngine;
            converter.Options.ConversionDelay = delay;

            // set the page timeout
            converter.Options.NavigationTimeout = Math.Min(timeout, Startup.NavigationTimeout);

            // create a new pdf document converting an url
            PdfDocument doc = converter.ConvertUrl(TxtUrl);

            // 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;
        }
    }
}