The Best HTML to PDF Converter for .NET.
Built for ASP.NET, C# and VB.NET.

using System.Web.Mvc;
using SelectPdf;

public class PdfController : Controller
{
    public ActionResult Export()
    {
        // instantiate the HTML to PDF converter
        HtmlToPdf converter = new HtmlToPdf();
        converter.Options.PdfPageSize = PdfPageSize.A4;

        // convert a URL (e.g. another action) to PDF
        PdfDocument doc = converter.ConvertUrl(
            Url.Action("Invoice", "Orders", null, Request.Url.Scheme));

        byte[] pdf = doc.Save();
        doc.Close();

        return File(pdf, "application/pdf", "invoice.pdf");
    }
}

Imports System.Web.Mvc
Imports SelectPdf

Public Class PdfController
    Inherits Controller

    Public Function [Export]() As ActionResult
        ' instantiate the HTML to PDF converter
        Dim converter As New HtmlToPdf()
        converter.Options.PdfPageSize = PdfPageSize.A4

        ' convert a URL (e.g. another action) to PDF
        Dim doc As PdfDocument = converter.ConvertUrl(
            Url.Action("Invoice", "Orders", Nothing, Request.Url.Scheme))

        Dim pdf As Byte() = doc.Save()
        doc.Close()

        Return File(pdf, "application/pdf", "invoice.pdf")
    End Function
End Class

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using SelectPdf;

public class ExportModel : PageModel
{
    [BindProperty]
    public string SourceUrl { get; set; } = "https://selectpdf.com";

    public IActionResult OnPost()
    {
        // instantiate the HTML to PDF converter
        HtmlToPdf converter = new HtmlToPdf();
        converter.Options.PdfPageSize = PdfPageSize.A4;

        // convert a URL to PDF
        PdfDocument doc = converter.ConvertUrl(SourceUrl);

        byte[] pdf = doc.Save();
        doc.Close();

        // stream the PDF straight back to the browser
        return File(pdf, "application/pdf", "invoice.pdf");
    }
}

@page "/export"
@inject IJSRuntime JS
@using SelectPdf

<button class="btn btn-primary" @onclick="OnExport">Download PDF</button>

@code {
    private async Task OnExport()
    {
        // instantiate the HTML to PDF converter
        HtmlToPdf converter = new HtmlToPdf();
        converter.Options.PdfPageSize = PdfPageSize.A4;

        // convert a URL to PDF
        PdfDocument doc = converter.ConvertUrl("https://selectpdf.com");

        byte[] pdf = doc.Save();
        doc.Close();

        // stream the bytes to the browser via JS interop
        await JS.InvokeVoidAsync("selectpdfDownload",
            "invoice.pdf", "application/pdf",
            Convert.ToBase64String(pdf));
    }
}