为 .NET 8 选择文档生成库

// This pattern requires deploying wkhtmltopdf binaries alongside your app
// and breaks in Docker containers without explicit path configuration
RotativaConfiguration.Setup(env.WebRootPath, "wkhtmltopdf");

' This pattern requires deploying wkhtmltopdf binaries alongside your app
' and breaks in Docker containers without explicit path configuration
RotativaConfiguration.Setup(env.WebRootPath, "wkhtmltopdf")

using PdfSharp.Pdf;
using PdfSharp.Drawing;

var document = new PdfDocument();
// PlatformNotSupportedException on Linux:
// System.Drawing.Common is not supported on this platform

Imports PdfSharp.Pdf
Imports PdfSharp.Drawing

Dim document As New PdfDocument()
' PlatformNotSupportedException on Linux:
' System.Drawing.Common is not supported on this platform

using IronPdf;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/invoice/{id}/pdf", async (int id, InvoiceService service) =>
{
    var invoice = await service.GetInvoiceAsync(id);
    var renderer = new ChromePdfRenderer();

    var pdf = renderer.RenderHtmlAsPdf(invoice.ToHtml());

    return Results.File(pdf.BinaryData, "application/pdf", $"invoice-{id}.pdf");
});

app.Run();

Imports IronPdf

Dim builder = WebApplication.CreateBuilder(args)
Dim app = builder.Build()

app.MapGet("/invoice/{id}/pdf", Async Function(id As Integer, service As InvoiceService) 
    Dim invoice = Await service.GetInvoiceAsync(id)
    Dim renderer = New ChromePdfRenderer()

    Dim pdf = renderer.RenderHtmlAsPdf(invoice.ToHtml())

    Return Results.File(pdf.BinaryData, "application/pdf", $"invoice-{id}.pdf")
End Function)

app.Run()

using QuestPDF.Fluent;
using QuestPDF.Infrastructure;

QuestPDF.Settings.License = LicenseType.Community; // Free under $1M revenue

Document.Create(container =>
{
    container.Page(page =>
    {
        page.Size(PageSizes.A4);
        page.Margin(2, Unit.Centimetre);
        page.Content().Column(col =>
        {
            col.Item().Text("Q4 Report").FontSize(24).Bold();
            col.Item().Table(table =>
            {
                table.ColumnsDefinition(c => { c.RelativeColumn(2); c.RelativeColumn(1); c.RelativeColumn(1); });
                table.Header(h =>
                {
                    h.Cell().Text("Metric").Bold();
                    h.Cell().Text("Value").Bold();
                    h.Cell().Text("Change").Bold();
                });
                table.Cell().Text("Revenue"); table.Cell().Text("$1.2M"); table.Cell().Text("+12%");
                table.Cell().Text("Users"); table.Cell().Text("45,230"); table.Cell().Text("+23%");
            });
        });
    });
}).GeneratePdf("report.pdf");

Imports QuestPDF.Fluent
Imports QuestPDF.Infrastructure

QuestPDF.Settings.License = LicenseType.Community ' Free under $1M revenue

Document.Create(Sub(container)
    container.Page(Sub(page)
        page.Size(PageSizes.A4)
        page.Margin(2, Unit.Centimetre)
        page.Content().Column(Sub(col)
            col.Item().Text("Q4 Report").FontSize(24).Bold()
            col.Item().Table(Sub(table)
                table.ColumnsDefinition(Sub(c)
                    c.RelativeColumn(2)
                    c.RelativeColumn(1)
                    c.RelativeColumn(1)
                End Sub)
                table.Header(Sub(h)
                    h.Cell().Text("Metric").Bold()
                    h.Cell().Text("Value").Bold()
                    h.Cell().Text("Change").Bold()
                End Sub)
                table.Cell().Text("Revenue")
                table.Cell().Text("$1.2M")
                table.Cell().Text("+12%")
                table.Cell().Text("Users")
                table.Cell().Text("45,230")
                table.Cell().Text("+23%")
            End Sub)
        End Sub)
    End Sub)
End Sub).GeneratePdf("report.pdf")

// Before (iTextSharp — doesn't compile against net8.0)
using iTextSharp.text;
using iTextSharp.text.pdf;

var doc = new Document();
PdfWriter.GetInstance(doc, new FileStream("output.pdf", FileMode.Create));
doc.Open();
doc.Add(new Paragraph("Hello World"));
doc.Close();

// After (IronPDF — targets net8.0)
using IronPdf;

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<p>Hello World</p>");
pdf.SaveAs("output.pdf");

Imports iTextSharp.text
Imports iTextSharp.text.pdf
Imports IronPdf
Imports System.IO

' Before (iTextSharp — doesn't compile against net8.0)
Dim doc As New Document()
PdfWriter.GetInstance(doc, New FileStream("output.pdf", FileMode.Create))
doc.Open()
doc.Add(New Paragraph("Hello World"))
doc.Close()

' After (IronPDF — targets net8.0)
Dim renderer As New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf("<p>Hello World</p>")
pdf.SaveAs("output.pdf")

// Before (DinkToPdf — DllNotFoundException on .NET 8)
var converter = new SynchronizedConverter(new PdfTools());
var doc = new HtmlToPdfDocument
{
    Objects = { new ObjectSettings { HtmlContent = html } }
};
var bytes = converter.Convert(doc);

// After (IronPDF — native .NET 8 support)
using IronPdf;

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(html);
var bytes = pdf.BinaryData;

Imports IronPdf

' Before (DinkToPdf — DllNotFoundException on .NET 8)
Dim converter = New SynchronizedConverter(New PdfTools())
Dim doc = New HtmlToPdfDocument With {
    .Objects = {New ObjectSettings With {.HtmlContent = html}}
}
Dim bytes = converter.Convert(doc)

' After (IronPDF — native .NET 8 support)
Dim renderer = New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf(html)
bytes = pdf.BinaryData