HTML到PDF转换器比较：.NET中的免费与付费库

using System.IO;
using DinkToPdf;
using DinkToPdf.Contracts;

var doc = new HtmlToPdfDocument()
{
    GlobalSettings = { PaperSize = PaperKind.A4 },
    Objects =
    {
        new ObjectSettings
        {
            HtmlContent = "<h1>Report</h1><div style='page-break-after: always;'>Page 1</div><div>Page 2</div>"
        }
    }
};

var converter = new BasicConverter(new PdfTools());
byte[] pdfBytes = converter.Convert(doc);
File.WriteAllBytes("Report.pdf", pdfBytes);

Imports System.IO
Imports DinkToPdf
Imports DinkToPdf.Contracts

Dim doc As New HtmlToPdfDocument() With {
    .GlobalSettings = New GlobalSettings() With {
        .PaperSize = PaperKind.A4
    },
    .Objects = {
        New ObjectSettings() With {
            .HtmlContent = "<h1>Report</h1><div style='page-break-after: always;'>Page 1</div><div>Page 2</div>"
        }
    }
}

Dim converter As New BasicConverter(New PdfTools())
Dim pdfBytes As Byte() = converter.Convert(doc)
File.WriteAllBytes("Report.pdf", pdfBytes)

using System.IO;
using DinkToPdf;
using DinkToPdf.Contracts;

var doc = new HtmlToPdfDocument()
{
    Objects = { new ObjectSettings { Page = "___PROTECTED_URL_82___" } }
};
var converter = new BasicConverter(new PdfTools());
byte[] pdfBytes = converter.Convert(doc);
File.WriteAllBytes("output.pdf", pdfBytes);

Imports System.IO
Imports DinkToPdf
Imports DinkToPdf.Contracts

Dim doc = New HtmlToPdfDocument() With {
    .Objects = {New ObjectSettings With {.Page = "___PROTECTED_URL_82___" }}
}
Dim converter = New BasicConverter(New PdfTools())
Dim pdfBytes As Byte() = converter.Convert(doc)
File.WriteAllBytes("output.pdf", pdfBytes)

using PuppeteerSharp;
using PuppeteerSharp.Media;
using System;
using System.Threading.Tasks;

class Program
{
    static async Task Main()
    {
        var chromePath = @"C:\Program Files\Google\Chrome\Application\chrome.exe";

        if (!System.IO.File.Exists(chromePath))
        {
            Console.WriteLine("Chrome/Chromium executable not found.");
            return;
        }

        await using var browser = await Puppeteer.LaunchAsync(new LaunchOptions
        {
            Headless = true,
            ExecutablePath = chromePath,
            Args = new[] { "--no-sandbox" }
        });

        await using var page = await browser.NewPageAsync();
        await page.GoToAsync("___PROTECTED_URL_83___");
        await page.PdfAsync("WebPage.pdf", new PdfOptions
        {
            MarginOptions = new MarginOptions { Top = "50px", Bottom = "50px" }
        });

        Console.WriteLine("PDF generated successfully!");
    }
}

Imports PuppeteerSharp
Imports PuppeteerSharp.Media
Imports System
Imports System.Threading.Tasks

Module Program
    Async Function Main() As Task
        Dim chromePath As String = "C:\Program Files\Google\Chrome\Application\chrome.exe"

        If Not System.IO.File.Exists(chromePath) Then
            Console.WriteLine("Chrome/Chromium executable not found.")
            Return
        End If

        Await Using browser = Await Puppeteer.LaunchAsync(New LaunchOptions With {
            .Headless = True,
            .ExecutablePath = chromePath,
            .Args = New String() {"--no-sandbox"}
        })

            Await Using page = Await browser.NewPageAsync()
                Await page.GoToAsync("___PROTECTED_URL_83___")
                Await page.PdfAsync("WebPage.pdf", New PdfOptions With {
                    .MarginOptions = New MarginOptions With {.Top = "50px", .Bottom = "50px"}
                })
            End Using
        End Using

        Console.WriteLine("PDF generated successfully!")
    End Function
End Module

using SelectPdf;

var converter = new SelectPdf.HtmlToPdf();
converter.Options.DisplayHeader = true;
converter.Options.DisplayFooter = true;

var doc = converter.ConvertUrl("___PROTECTED_URL_84___");
doc.Save("WebPageWithHeader.pdf");

Imports SelectPdf

Dim converter As New SelectPdf.HtmlToPdf()
converter.Options.DisplayHeader = True
converter.Options.DisplayFooter = True

Dim doc = converter.ConvertUrl("___PROTECTED_URL_84___")
doc.Save("WebPageWithHeader.pdf")

using EvoPdf;
using System.IO;

var htmlToPdf = new HtmlToPdfConverter();
byte[] pdfBytes = htmlToPdf.ConvertUrl("___PROTECTED_URL_85___");
File.WriteAllBytes("WebPageEvoPdf.pdf", pdfBytes);

Imports EvoPdf
Imports System.IO

Dim htmlToPdf As New HtmlToPdfConverter()
Dim pdfBytes As Byte() = htmlToPdf.ConvertUrl("___PROTECTED_URL_85___")
File.WriteAllBytes("WebPageEvoPdf.pdf", pdfBytes)