Apache PDFBox is a respected open-source Java library for handling PDFs. However, for .NET developers, the available options are unofficial community-driven ports that pose significant challenges - Java-style APIs, incomplete feature coverage, and limited .NET community support. This guide provides a detailed migration path from Apache PDFBox .NET ports to IronPDF, a native .NET PDF library built specifically for the .NET ecosystem.
While Apache PDFBox is excellent in the Java ecosystem, its unofficial .NET ports present several challenges that affect .NET development teams.
Apache PDFBox is primarily a Java library (current line 3.0.7, legacy 2.0.36, Apache License 2.0). All .NET options are community-driven ports, and most are abandoned: Pdfbox 1.1.1 (last published 2013, built against PDFBox 1.8.2), Pdfbox-IKVM 1.8.9 (last published March 2017), and PdfBox_DotNet_Version 2.0.15 (last published July 2019). The only actively maintained option is MASES.NetPDF (3.0.x line, tracking PDFBox 3.0.x), which is a JCOBridge wrapper that requires a JVM at runtime alongside the CLR. These ports often lag behind Java releases and may miss critical features, bug fixes, or security updates - a risk worth weighing for long-lived .NET projects.
The ported APIs retain Java conventions that feel foreign in .NET code. Developers encounter camelCase methods instead of PascalCase, Java File objects instead of standard .NET strings, and explicit close() calls instead of IDisposable patterns. This cognitive overhead affects development speed and code maintainability.
Apache PDFBox is designed for PDF manipulation, not HTML-to-PDF conversion. Creating PDFs requires manual page construction with precise coordinate positioning - a tedious and error-prone process that doesn't scale for modern document generation needs.
The .NET ecosystem around Apache PDFBox ports is sparse. Finding help, examples, or best practices for .NET-specific issues proves difficult compared to libraries with active .NET communities.
The IKVM-based ports (Pdfbox-IKVM, Pdfbox) bundle a .NET reimplementation of the JVM, while MASES.NetPDF calls into a real JVM via JCOBridge. Either way, the deployment carries Java runtime baggage that idiomatic .NET libraries avoid.
Understanding the fundamental differences between these libraries helps plan an effective migration strategy.
| Aspect | Apache PDFBox .NET Ports | IronPDF |
|---|---|---|
| Native Design | Java-centric, unofficial .NET port | Native .NET library |
| API Style | Java conventions (camelCase, close()) | Idiomatic C# (PascalCase, using) |
| HTML Rendering | Not supported (manual page construction) | Full Chromium-based HTML/CSS/JS |
| PDF Creation | Manual coordinate positioning | CSS-based layout |
| Community | Java-focused, sparse .NET resources | Active .NET community |
| Support | Community-only | Commercial support available |
| Resource Cleanup | Explicit close() calls | IDisposable with using statements |
Ensure your environment meets these requirements:
Run these commands in your solution directory to identify all Apache PDFBox references:
grep -r "org.apache.pdfbox\|Org.Apache.Pdfbox\|PDDocument\|PDFTextStripper" --include="*.cs" .
grep -rE "Pdfbox|Pdfbox-IKVM|PdfBox_DotNet_Version|MASES\.NetPDF" --include="*.csproj" .| Category | Apache PDFBox .NET Port | IronPDF | Migration Action |
|---|---|---|---|
| Object Model | PDDocument, PDPage | PdfDocument, ChromePdfRenderer | Different class hierarchy |
| PDF Creation | Manual page/content streams | HTML rendering | Rewrite creation logic |
| Method Style | camelCase() (Java style) | PascalCase() (.NET style) | Update method names |
| Resource Cleanup | document.close() | using statements | Change disposal pattern |
| File Access | Java File objects | Standard .NET strings/streams | Use .NET types |
| Text Extraction | PDFTextStripper class | pdf.ExtractAllText() | Simpler API |
Remove the Apache PDFBox .NET port packages and install IronPDF:
# Remove whichever PDFBox .NET port your project uses
dotnet remove package Pdfbox # built against PDFBox 1.8.2 (2013)
dotnet remove package Pdfbox-IKVM # IKVM wrapper, last update 2017
dotnet remove package PdfBox_DotNet_Version # last update 2019
dotnet remove package MASES.NetPDF # JCOBridge wrapper, requires JVM
# Install IronPDF
dotnet add package IronPdfAdd the IronPDF license key at application startup:
// Add at application startup, before any IronPDF operations
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";' Add at application startup, before any IronPDF operations
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"Perform a global find-and-replace across your solution:
All PDFBox .NET ports mirror the Java package hierarchy. The IKVM-based ports keep Java's lowercase form (org.apache.pdfbox.*); MASES.NetPDF title-cases it for C# (Org.Apache.Pdfbox.*).
| Find | Replace With |
|---|---|
using org.apache.pdfbox.pdmodel; (IKVM ports) | using IronPdf; |
using org.apache.pdfbox.text; (IKVM ports) | using IronPdf; |
using org.apache.pdfbox.multipdf; (IKVM ports) | using IronPdf; |
using Org.Apache.Pdfbox.Pdmodel; (MASES.NetPDF) | using IronPdf; |
using Org.Apache.Pdfbox.Text; (MASES.NetPDF) | using IronPdf; |
| Apache PDFBox Method | IronPDF Method |
|---|---|
PDDocument.load(path) | PdfDocument.FromFile(path) |
PDDocument.load(stream) | PdfDocument.FromStream(stream) |
new PDDocument() | new ChromePdfRenderer() |
document.save(path) | pdf.SaveAs(path) |
document.close() | using statement or Dispose() |
document.getNumberOfPages() | pdf.PageCount |
document.getPage(index) | pdf.Pages[index] |
document.removePage(index) | pdf.RemovePages(index) |
| Apache PDFBox Method | IronPDF Method |
|---|---|
new PDFTextStripper() | Not needed |
stripper.getText(document) | pdf.ExtractAllText() |
stripper.setStartPage(n) | pdf.Pages[n].Text |
stripper.setSortByPosition(true) | Automatic |
| Apache PDFBox Method | IronPDF Method |
|---|---|
new PDFMergerUtility() | Not needed |
merger.addSource(file) | Load with FromFile() |
merger.mergeDocuments() | PdfDocument.Merge(pdfs) |
new Splitter() | Not needed |
splitter.split(document) | pdf.CopyPages(indices) |
| Apache PDFBox Method | IronPDF Method |
|---|---|
StandardProtectionPolicy | pdf.SecuritySettings |
policy.setUserPassword() | pdf.SecuritySettings.UserPassword |
policy.setOwnerPassword() | pdf.SecuritySettings.OwnerPassword |
policy.setPermissions() | pdf.SecuritySettings.AllowUserXxx |
The most common Apache PDFBox operation demonstrates the API simplification IronPDF provides.
Apache PDFBox .NET Port Implementation:
// Apache PDFBox is a Java library — there is no official .NET port.
// Example uses Pdfbox-IKVM (last published 2017) on NuGet; namespaces
// mirror the Java packages exactly because IKVM exposes the Java API.
using org.apache.pdfbox.pdmodel;
using org.apache.pdfbox.text;
using java.io;
using System;
class Program
{
static void Main()
{
PDDocument document = PDDocument.load(new File("document.pdf"));
try
{
PDFTextStripper stripper = new PDFTextStripper();
string text = stripper.getText(document);
Console.WriteLine(text);
}
finally
{
document.close();
}
}
}Imports org.apache.pdfbox.pdmodel
Imports org.apache.pdfbox.text
Imports java.io
Imports System
Module Program
Sub Main()
Dim document As PDDocument = PDDocument.load(New File("document.pdf"))
Try
Dim stripper As New PDFTextStripper()
Dim text As String = stripper.getText(document)
Console.WriteLine(text)
Finally
document.close()
End Try
End Sub
End ModuleIronPDF Implementation:
// NuGet: Install-Package IronPdf
using IronPdf;
using System;
class Program
{
static void Main()
{
var pdf = PdfDocument.FromFile("document.pdf");
string text = pdf.ExtractAllText();
Console.WriteLine(text);
// Or extract text from specific pages
string pageText = pdf.ExtractTextFromPage(0);
Console.WriteLine(pageText);
}
}' NuGet: Install-Package IronPdf
Imports IronPdf
Imports System
Module Program
Sub Main()
Dim pdf = PdfDocument.FromFile("document.pdf")
Dim text As String = pdf.ExtractAllText()
Console.WriteLine(text)
' Or extract text from specific pages
Dim pageText As String = pdf.ExtractTextFromPage(0)
Console.WriteLine(pageText)
End Sub
End ModuleIronPDF eliminates the PDFTextStripper class entirely, replacing multi-step extraction with a single method call.
Apache PDFBox does not support HTML-to-PDF conversion natively - this represents a fundamental capability gap.
IronPDF Implementation:
// NuGet: Install-Package IronPdf
using IronPdf;
using System;
class Program
{
static void Main()
{
var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>This is HTML to PDF</p>");
pdf.SaveAs("output.pdf");
Console.WriteLine("PDF created successfully");
}
}Imports IronPdf
Imports System
Class Program
Shared Sub Main()
Dim renderer = New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>This is HTML to PDF</p>")
pdf.SaveAs("output.pdf")
Console.WriteLine("PDF created successfully")
End Sub
End ClassIronPDF's Chromium-based rendering engine provides full HTML, CSS, and JavaScript support. For advanced scenarios, see the HTML to PDF documentation.
Apache PDFBox .NET Port Implementation:
// Apache PDFBox via a .NET port (e.g. Pdfbox-IKVM on nuget.org).
// The Java class org.apache.pdfbox.multipdf.PDFMergerUtility is exposed
// directly through IKVM, so method names stay Java-style (camelCase).
using org.apache.pdfbox.multipdf;
using org.apache.pdfbox.io;
using System;
class Program
{
static void Main()
{
PDFMergerUtility merger = new PDFMergerUtility();
merger.addSource("document1.pdf");
merger.addSource("document2.pdf");
merger.setDestinationFileName("merged.pdf");
// MemoryUsageSetting governs heap vs temp-file buffering
merger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
Console.WriteLine("PDFs merged");
}
}Imports org.apache.pdfbox.multipdf
Imports org.apache.pdfbox.io
Imports System
Module Program
Sub Main()
Dim merger As New PDFMergerUtility()
merger.addSource("document1.pdf")
merger.addSource("document2.pdf")
merger.setDestinationFileName("merged.pdf")
' MemoryUsageSetting governs heap vs temp-file buffering
merger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly())
Console.WriteLine("PDFs merged")
End Sub
End ModuleIronPDF Implementation:
// NuGet: Install-Package IronPdf
using IronPdf;
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
var pdf1 = PdfDocument.FromFile("document1.pdf");
var pdf2 = PdfDocument.FromFile("document2.pdf");
var pdf3 = PdfDocument.FromFile("document3.pdf");
var merged = PdfDocument.Merge(pdf1, pdf2, pdf3);
merged.SaveAs("merged.pdf");
Console.WriteLine("PDFs merged successfully");
}
}' NuGet: Install-Package IronPdf
Imports IronPdf
Imports System
Imports System.Collections.Generic
Module Program
Sub Main()
Dim pdf1 = PdfDocument.FromFile("document1.pdf")
Dim pdf2 = PdfDocument.FromFile("document2.pdf")
Dim pdf3 = PdfDocument.FromFile("document3.pdf")
Dim merged = PdfDocument.Merge(pdf1, pdf2, pdf3)
merged.SaveAs("merged.pdf")
Console.WriteLine("PDFs merged successfully")
End Sub
End ModuleIronPDF's static Merge method accepts multiple documents directly, eliminating the utility class pattern.
The most dramatic difference appears when creating PDFs. Apache PDFBox requires manual coordinate positioning.
Apache PDFBox .NET Port Implementation:
using org.apache.pdfbox.pdmodel;
using org.apache.pdfbox.pdmodel.font;
using org.apache.pdfbox.pdmodel.edit;
public void CreatePdf(string outputPath)
{
PDDocument document = new PDDocument();
try
{
PDPage page = new PDPage();
document.addPage(page);
PDPageContentStream contentStream = new PDPageContentStream(document, page);
PDFont font = PDType1Font.HELVETICA_BOLD;
contentStream.beginText();
contentStream.setFont(font, 24);
contentStream.moveTextPositionByAmount(72, 700);
contentStream.drawString("Hello World");
contentStream.endText();
contentStream.beginText();
contentStream.setFont(PDType1Font.HELVETICA, 12);
contentStream.moveTextPositionByAmount(72, 650);
contentStream.drawString("This is a paragraph of text.");
contentStream.endText();
contentStream.close();
document.save(outputPath);
}
finally
{
document.close();
}
}Imports org.apache.pdfbox.pdmodel
Imports org.apache.pdfbox.pdmodel.font
Imports org.apache.pdfbox.pdmodel.edit
Public Sub CreatePdf(outputPath As String)
Dim document As New PDDocument()
Try
Dim page As New PDPage()
document.addPage(page)
Dim contentStream As New PDPageContentStream(document, page)
Dim font As PDFont = PDType1Font.HELVETICA_BOLD
contentStream.beginText()
contentStream.setFont(font, 24)
contentStream.moveTextPositionByAmount(72, 700)
contentStream.drawString("Hello World")
contentStream.endText()
contentStream.beginText()
contentStream.setFont(PDType1Font.HELVETICA, 12)
contentStream.moveTextPositionByAmount(72, 650)
contentStream.drawString("This is a paragraph of text.")
contentStream.endText()
contentStream.close()
document.save(outputPath)
Finally
document.close()
End Try
End SubIronPDF Implementation:
using IronPdf;
public void CreatePdf(string outputPath)
{
var renderer = new ChromePdfRenderer();
string html = @"
<html>
<head>
<style>
body { font-family: Helvetica, Arial, sans-serif; margin: 1in; }
h1 { font-size: 24pt; font-weight: bold; }
p { font-size: 12pt; }
</style>
</head>
<body>
<h1>Hello World</h1>
<p>This is a paragraph of text.</p>
</body>
</html>";
using var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs(outputPath);
}Imports IronPdf
Public Sub CreatePdf(outputPath As String)
Dim renderer As New ChromePdfRenderer()
Dim html As String = "
<html>
<head>
<style>
body { font-family: Helvetica, Arial, sans-serif; margin: 1in; }
h1 { font-size: 24pt; font-weight: bold; }
p { font-size: 12pt; }
</style>
</head>
<body>
<h1>Hello World</h1>
<p>This is a paragraph of text.</p>
</body>
</html>"
Using pdf = renderer.RenderHtmlAsPdf(html)
pdf.SaveAs(outputPath)
End Using
End SubHTML/CSS-based creation eliminates coordinate calculations, font management, and content stream manipulation.
Apache PDFBox .NET Port Implementation:
using org.apache.pdfbox.pdmodel;
using org.apache.pdfbox.pdmodel.encryption;
public void ProtectPdf(string inputPath, string outputPath, string password)
{
PDDocument document = PDDocument.load(new File(inputPath));
try
{
AccessPermission ap = new AccessPermission();
ap.setCanPrint(true);
ap.setCanExtractContent(false);
StandardProtectionPolicy spp = new StandardProtectionPolicy(password, password, ap);
spp.setEncryptionKeyLength(128);
document.protect(spp);
document.save(outputPath);
}
finally
{
document.close();
}
}Imports org.apache.pdfbox.pdmodel
Imports org.apache.pdfbox.pdmodel.encryption
Public Sub ProtectPdf(inputPath As String, outputPath As String, password As String)
Dim document As PDDocument = PDDocument.load(New File(inputPath))
Try
Dim ap As New AccessPermission()
ap.setCanPrint(True)
ap.setCanExtractContent(False)
Dim spp As New StandardProtectionPolicy(password, password, ap)
spp.setEncryptionKeyLength(128)
document.protect(spp)
document.save(outputPath)
Finally
document.close()
End Try
End SubIronPDF Implementation:
using IronPdf;
public void ProtectPdf(string inputPath, string outputPath, string password)
{
using var pdf = PdfDocument.FromFile(inputPath);
pdf.SecuritySettings.UserPassword = password;
pdf.SecuritySettings.OwnerPassword = password;
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.FullPrintRights;
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SaveAs(outputPath);
}Imports IronPdf
Public Sub ProtectPdf(inputPath As String, outputPath As String, password As String)
Using pdf = PdfDocument.FromFile(inputPath)
pdf.SecuritySettings.UserPassword = password
pdf.SecuritySettings.OwnerPassword = password
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.FullPrintRights
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SaveAs(outputPath)
End Using
End SubIronPDF uses strongly-typed properties instead of separate permission and policy objects.
Apache PDFBox .NET Port Implementation:
using org.apache.pdfbox.pdmodel;
using org.apache.pdfbox.pdmodel.edit;
using org.apache.pdfbox.pdmodel.font;
public void AddWatermark(string inputPath, string outputPath, string watermarkText)
{
PDDocument document = PDDocument.load(new File(inputPath));
try
{
PDFont font = PDType1Font.HELVETICA_BOLD;
for (int i = 0; i < document.getNumberOfPages(); i++)
{
PDPage page = document.getPage(i);
PDPageContentStream cs = new PDPageContentStream(
document, page, PDPageContentStream.AppendMode.APPEND, true, true);
cs.beginText();
cs.setFont(font, 72);
cs.setNonStrokingColor(200, 200, 200);
cs.setTextMatrix(Matrix.getRotateInstance(Math.toRadians(45), 200, 400));
cs.showText(watermarkText);
cs.endText();
cs.close();
}
document.save(outputPath);
}
finally
{
document.close();
}
}Imports org.apache.pdfbox.pdmodel
Imports org.apache.pdfbox.pdmodel.edit
Imports org.apache.pdfbox.pdmodel.font
Public Sub AddWatermark(inputPath As String, outputPath As String, watermarkText As String)
Dim document As PDDocument = PDDocument.load(New File(inputPath))
Try
Dim font As PDFont = PDType1Font.HELVETICA_BOLD
For i As Integer = 0 To document.getNumberOfPages() - 1
Dim page As PDPage = document.getPage(i)
Dim cs As New PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, True, True)
cs.beginText()
cs.setFont(font, 72)
cs.setNonStrokingColor(200, 200, 200)
cs.setTextMatrix(Matrix.getRotateInstance(Math.toRadians(45), 200, 400))
cs.showText(watermarkText)
cs.endText()
cs.close()
Next
document.save(outputPath)
Finally
document.close()
End Try
End SubIronPDF Implementation:
using IronPdf;
public void AddWatermark(string inputPath, string outputPath, string watermarkText)
{
using var pdf = PdfDocument.FromFile(inputPath);
pdf.ApplyWatermark(
$"<h1 style='color:lightgray;font-size:72px;'>{watermarkText}</h1>",
rotation: 45,
opacity: 50);
pdf.SaveAs(outputPath);
}Imports IronPdf
Public Sub AddWatermark(inputPath As String, outputPath As String, watermarkText As String)
Using pdf = PdfDocument.FromFile(inputPath)
pdf.ApplyWatermark(
$"<h1 style='color:lightgray;font-size:72px;'>{watermarkText}</h1>",
rotation:=45,
opacity:=50)
pdf.SaveAs(outputPath)
End Using
End SubIronPDF's HTML-based watermarking eliminates page iteration and matrix calculations.
Apache PDFBox does not support URL-to-PDF conversion. IronPDF provides native support:
using IronPdf;
public void ConvertUrlToPdf(string url, string outputPath)
{
var renderer = new ChromePdfRenderer();
using var pdf = renderer.RenderUrlAsPdf(url);
pdf.SaveAs(outputPath);
}Imports IronPdf
Public Sub ConvertUrlToPdf(url As String, outputPath As String)
Dim renderer As New ChromePdfRenderer()
Using pdf = renderer.RenderUrlAsPdf(url)
pdf.SaveAs(outputPath)
End Using
End SubFor complete URL conversion options, see the URL to PDF documentation.
Apache PDFBox requires manual positioning on each page with no built-in header/footer support. IronPDF provides declarative configuration:
using IronPdf;
public void CreatePdfWithHeaderFooter(string html, string outputPath)
{
var renderer = new ChromePdfRenderer();
renderer.RenderingOptions.TextHeader = new TextHeaderFooter
{
CenterText = "Document Title",
FontSize = 12
};
renderer.RenderingOptions.TextFooter = new TextHeaderFooter
{
CenterText = "Page {page} of {total-pages}",
FontSize = 10
};
using var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs(outputPath);
}Imports IronPdf
Public Sub CreatePdfWithHeaderFooter(html As String, outputPath As String)
Dim renderer = New ChromePdfRenderer()
renderer.RenderingOptions.TextHeader = New TextHeaderFooter With {
.CenterText = "Document Title",
.FontSize = 12
}
renderer.RenderingOptions.TextFooter = New TextHeaderFooter With {
.CenterText = "Page {page} of {total-pages}",
.FontSize = 10
}
Using pdf = renderer.RenderHtmlAsPdf(html)
pdf.SaveAs(outputPath)
End Using
End SubFor advanced layouts, see the headers and footers documentation.
IronPDF integrates naturally with modern .NET web applications:
[HttpPost]
public IActionResult GeneratePdf([FromBody] ReportRequest request)
{
var renderer = new ChromePdfRenderer();
using var pdf = renderer.RenderHtmlAsPdf(request.Html);
return File(pdf.BinaryData, "application/pdf", "report.pdf");
}<HttpPost>
Public Function GeneratePdf(<FromBody> request As ReportRequest) As IActionResult
Dim renderer As New ChromePdfRenderer()
Using pdf = renderer.RenderHtmlAsPdf(request.Html)
Return File(pdf.BinaryData, "application/pdf", "report.pdf")
End Using
End FunctionApache PDFBox ports don't support async operations. IronPDF provides full async/await capabilities:
using IronPdf;
public async Task<byte[]> GeneratePdfAsync(string html)
{
var renderer = new ChromePdfRenderer();
using var pdf = await renderer.RenderHtmlAsPdfAsync(html);
return pdf.BinaryData;
}Imports IronPdf
Public Async Function GeneratePdfAsync(html As String) As Task(Of Byte())
Dim renderer As New ChromePdfRenderer()
Using pdf = Await renderer.RenderHtmlAsPdfAsync(html)
Return pdf.BinaryData
End Using
End Functionpublic interface IPdfService
{
Task<byte[]> GeneratePdfAsync(string html);
string ExtractText(string pdfPath);
}
public class IronPdfService : IPdfService
{
private readonly ChromePdfRenderer _renderer;
public IronPdfService()
{
_renderer = new ChromePdfRenderer();
_renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
}
public async Task<byte[]> GeneratePdfAsync(string html)
{
using var pdf = await _renderer.RenderHtmlAsPdfAsync(html);
return pdf.BinaryData;
}
public string ExtractText(string pdfPath)
{
using var pdf = PdfDocument.FromFile(pdfPath);
return pdf.ExtractAllText();
}
}Imports System.Threading.Tasks
Public Interface IPdfService
Function GeneratePdfAsync(html As String) As Task(Of Byte())
Function ExtractText(pdfPath As String) As String
End Interface
Public Class IronPdfService
Implements IPdfService
Private ReadOnly _renderer As ChromePdfRenderer
Public Sub New()
_renderer = New ChromePdfRenderer()
_renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
End Sub
Public Async Function GeneratePdfAsync(html As String) As Task(Of Byte()) Implements IPdfService.GeneratePdfAsync
Using pdf = Await _renderer.RenderHtmlAsPdfAsync(html)
Return pdf.BinaryData
End Using
End Function
Public Function ExtractText(pdfPath As String) As String Implements IPdfService.ExtractText
Using pdf = PdfDocument.FromFile(pdfPath)
Return pdf.ExtractAllText()
End Using
End Function
End Class| Scenario | Apache PDFBox .NET Port | IronPDF |
|---|---|---|
| Text extraction | ~80 MB | ~50 MB |
| PDF creation | ~100 MB | ~60 MB |
| Batch (100 PDFs) | High (manual cleanup) | ~100 MB |
Use using Statements:
// Automatic cleanup with IDisposable pattern
using var pdf = PdfDocument.FromFile(path);netReuse Renderer for Batch Operations:
var renderer = new ChromePdfRenderer();
foreach (var html in htmlList)
{
using var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs($"output_{i}.pdf");
}Imports IronPdf
Dim renderer As New ChromePdfRenderer()
For Each html In htmlList
Using pdf = renderer.RenderHtmlAsPdf(html)
pdf.SaveAs($"output_{i}.pdf")
End Using
NextUse Async in Web Applications:
using var pdf = await renderer.RenderHtmlAsPdfAsync(html);netReplace camelCase Java methods with PascalCase .NET equivalents:
// PDFBox: stripper.getText(document)
// IronPDF: pdf.ExtractAllText()
// PDFBox: document.getNumberOfPages()
// IronPDF: pdf.PageCount' PDFBox: stripper.getText(document)
' IronPDF: pdf.ExtractAllText()
' PDFBox: document.getNumberOfPages()
' IronPDF: pdf.PageCountclose() MethodIronPDF uses the IDisposable pattern:
// PDFBox
document.close();
// IronPDF
using var pdf = PdfDocument.FromFile(path);
// Automatic disposal at end of scopenetPDFTextStripper EquivalentText extraction is simplified to a single method:
// IronPDF: Just call ExtractAllText()
string text = pdf.ExtractAllText();
// Per-page extraction:
string pageText = pdf.Pages[0].Text;' IronPDF: Just call ExtractAllText()
Dim text As String = pdf.ExtractAllText()
' Per-page extraction:
Dim pageText As String = pdf.Pages(0).TextPDFMergerUtility Not FoundUse the static Merge method:
// IronPDF uses static Merge
var merged = PdfDocument.Merge(pdf1, pdf2, pdf3);' IronPDF uses static Merge
Dim merged = PdfDocument.Merge(pdf1, pdf2, pdf3)After completing the code migration, verify the following:
IronPdf.License.IsLicensed)Migrating from Apache PDFBox .NET ports to IronPDF transforms your PDF codebase from Java-style patterns to idiomatic C#. The shift from manual coordinate positioning to HTML/CSS rendering, combined with native async support and modern .NET integration, delivers cleaner, more maintainable code with professional support backing your production applications.
Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.
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