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  4. 从 Apryse PDF 迁移到 IronPDF
迁移指南

如何用 C# 从 Apryse PDF 迁移到 IronPDF

Curtis Chau
Curtis Chau
已更新:

Full Comparison

Looking for a detailed feature-by-feature breakdown? See how IronPDF stacks up against Apryse PDF on pricing, HTML support, and licensing.

View Full Comparison

Apryse PDF（前身为 PDFTron）是一款优质的企业级 PDF SDK，以其全面的文档处理能力而著称。 然而，其溢价定价模式（每位开发人员每年超过 1,500 美元）、复杂的集成要求和 C++ 传统为寻求直接 PDF 功能的开发团队制造了障碍。 本综合指南提供了从Apryse PDF逐步迁移到IronPDF的路径--IronPDF for .NET 是一个本地 .NET PDF 库，具有现代 C# 习惯、更简单的集成和一次性永久许可。

为什么要从Apryse PDF迁移？

虽然Apryse PDF提供了强大的功能，但仍有一些因素促使开发团队寻求替代方案来满足其 PDF 生成需求。

高级定价和订阅模式

Apryse PDF 的目标客户是企业客户，其定价可能会让中小型项目望而却步：

方面 Apryse PDF (PDFTron) IronPDF
起始价格 1,500+美元/开发人员/年（已报告） 一次性 749 美元（Lite）
许可模式 年度订购 永久许可证
查看器许可 单独额外费用 不适用（使用标准查看器）
服务器许可证 要求企业定价 包含在许可证层级中
3年总成本 每位开发人员 4 500 美元以上 一次性 749 美元

集成的复杂性

Apryse PDF 的 C++ 传统带来了复杂性，影响了开发速度：

特征 Apryse PDF IronPDF
设置 模块路径、外部二进制文件 单个 NuGet 软件包
初始化 PDFNet.Initialize() 带许可证 简单的属性分配
HTML 渲染 需要外部 html2pdf 模块 内置 Chromium 引擎
API 风格 C++ 遗产，复杂 现代 C# 惯例
依赖关系 多个 DLL，特定平台 自带软件包

何时考虑迁移

迁移到 IronPDF，如果：

  • 您主要需要将 HTML/URL 转换为 PDF
  • 您希望 API 更简单，模板更少
  • 对于您的使用情况而言，高级定价并不合理
  • 您不需要 PDFViewCtrl 浏览器控件
  • 您更偏好一次性许可，而不是订阅

如果出现以下情况，请继续使用 Apryse PDF：

  • 您需要他们的本地查看器控件 (PDFViewCtrl)
  • 您广泛使用 XOD 或专有格式
  • 您需要特定的企业功能（高级编辑等）
  • 您的组织已经拥有企业许可证

迁移前准备

前提条件

确保您的环境符合这些要求：

  • .NET Framework 4.6.2+ 或 .NET Core 3.1 / .NET 5-9
  • Visual Studio 2019+ 或带有 C# 扩展的 VS Code
  • 访问 NuGet 包管理器 -IronPDF许可证密钥（可在ironpdf.com免费试用）

审计Apryse PDF的使用

在解决方案目录中运行这些命令以识别所有 Apryse 引用：

# Find all pdftron using statements
grep -r "using pdftron" --include="*.cs" .

# Find PDFNet initialization
grep -r "PDFNet.Initialize\|PDFNet.SetResourcesPath" --include="*.cs" .

# Find PDFDoc usage
grep -r "new PDFDoc\|PDFDoc\." --include="*.cs" .

# Find HTML2PDF usage
grep -r "HTML2PDF\|InsertFromURL\|InsertFromHtmlString" --include="*.cs" .

# Find ElementReader/Writer usage
grep -r "ElementReader\|ElementWriter\|ElementBuilder" --include="*.cs" .
# Find all pdftron using statements
grep -r "using pdftron" --include="*.cs" .

# Find PDFNet initialization
grep -r "PDFNet.Initialize\|PDFNet.SetResourcesPath" --include="*.cs" .

# Find PDFDoc usage
grep -r "new PDFDoc\|PDFDoc\." --include="*.cs" .

# Find HTML2PDF usage
grep -r "HTML2PDF\|InsertFromURL\|InsertFromHtmlString" --include="*.cs" .

# Find ElementReader/Writer usage
grep -r "ElementReader\|ElementWriter\|ElementBuilder" --include="*.cs" .
SHELL

值得期待的重大变化

Apryse PDF 样式 更改要求
PDFNet.Initialize() 替换为 IronPdf.License.LicenseKey
HTML2PDF 模块 内置 ChromePdfRenderer
ElementReader/ElementWriter IronPDF 内部处理内容
SDFDoc.SaveOptions 简单 SaveAs() 方法
PDFViewCtrl 使用外部 PDF 查看器
XOD 格式 转换为 PDF 或图像
模块路径配置 不需要

逐步迁移过程

步骤 1：更新 NuGet 软件包

删除 Apryse/PDFTron 软件包并安装 IronPDF：

# Remove Apryse/PDFTron packages
dotnet remove package PDFTron.NET.x64
dotnet remove package PDFTron.NET.x86
dotnet remove package pdftron

# Install IronPDF
dotnet add package IronPdf
# Remove Apryse/PDFTron packages
dotnet remove package PDFTron.NET.x64
dotnet remove package PDFTron.NET.x86
dotnet remove package pdftron

# Install IronPDF
dotnet add package IronPdf
SHELL

或通过软件包管理器控制台：

Uninstall-Package PDFTron.NET.x64
Install-Package IronPdf

步骤 2：更新命名空间引用

用IronPDF替换 Apryse 命名空间：

// Remove these
using pdftron;
using pdftron.PDF;
using pdftron.PDF.Convert;
using pdftron.SDF;
using pdftron.Filters;

// Add these
using IronPdf;
using IronPdf.Rendering;
// Remove these
using pdftron;
using pdftron.PDF;
using pdftron.PDF.Convert;
using pdftron.SDF;
using pdftron.Filters;

// Add these
using IronPdf;
using IronPdf.Rendering;
Imports IronPdf
Imports IronPdf.Rendering
$vbLabelText   $csharpLabel

步骤 3：删除初始化模板

Apryse PDF 需要复杂的初始化。IronPDF完全解决了这一问题。

Apryse PDF 实现：

// Complex initialization
PDFNet.Initialize("YOUR_LICENSE_KEY");
PDFNet.SetResourcesPath("path/to/resources");
// Plus module path for HTML2PDF...
// Complex initialization
PDFNet.Initialize("YOUR_LICENSE_KEY");
PDFNet.SetResourcesPath("path/to/resources");
// Plus module path for HTML2PDF...
' Complex initialization
PDFNet.Initialize("YOUR_LICENSE_KEY")
PDFNet.SetResourcesPath("path/to/resources")
' Plus module path for HTML2PDF...
$vbLabelText   $csharpLabel

IronPDF 实现：

// Simple license assignment (optional for development)
IronPdf.License.LicenseKey = "YOUR_LICENSE_KEY";
// Simple license assignment (optional for development)
IronPdf.License.LicenseKey = "YOUR_LICENSE_KEY";
' Simple license assignment (optional for development)
IronPdf.License.LicenseKey = "YOUR_LICENSE_KEY"
$vbLabelText   $csharpLabel

使用IronPDF不需要 PDFNet.Terminate() 调用——资源会自动管理。

完整的 API 迁移参考

核心类映射

Apryse PDF 类 IronPDF 同等产品
PDFDoc PdfDocument
HTML2PDF ChromePdfRenderer
TextExtractor PdfDocument.ExtractAllText()
Stamper PdfDocument.ApplyWatermark()
PDFDraw PdfDocument.ToBitmap()
SecurityHandler PdfDocument.SecuritySettings
PDFNet IronPdf.License

文档操作

Apryse PDF 方法 IronPDF 方法
new PDFDoc() new PdfDocument()
new PDFDoc(path) PdfDocument.FromFile(path)
new PDFDoc(buffer) PdfDocument.FromBinaryData(bytes)
doc.Save(path, options) pdf.SaveAs(path)
doc.Save(buffer) pdf.BinaryData
doc.Close() pdf.Dispose()
doc.GetPageCount() pdf.PageCount
doc.AppendPages(doc2, start, end) PdfDocument.Merge(pdfs)

HTML 到 PDF 转换

Apryse PDF 方法 IronPDF 方法
HTML2PDF.Convert(doc) renderer.RenderHtmlAsPdf(html)
converter.InsertFromURL(url) renderer.RenderUrlAsPdf(url)
converter.InsertFromHtmlString(html) renderer.RenderHtmlAsPdf(html)
converter.SetModulePath(path) 不需要
converter.SetPaperSize(width, height) RenderingOptions.PaperSize
converter.SetLandscape(true) RenderingOptions.PaperOrientation

代码迁移示例

HTML字符串到PDF

最常见的操作展示了模板代码的大幅减少。

Apryse PDF 实现：

using pdftron;
using pdftron.PDF;

class Program
{
    static void Main()
    {
        PDFNet.Initialize("YOUR_LICENSE_KEY");
        PDFNet.SetResourcesPath("path/to/resources");

        string html = "<html><body><h1>Hello World</h1><p>Content here</p></body></html>";

        using (PDFDoc doc = new PDFDoc())
        {
            HTML2PDF converter = new HTML2PDF();
            converter.SetModulePath("path/to/html2pdf");
            converter.InsertFromHtmlString(html);

            HTML2PDF.WebPageSettings settings = new HTML2PDF.WebPageSettings();
            settings.SetPrintBackground(true);
            settings.SetLoadImages(true);

            if (converter.Convert(doc))
            {
                doc.Save("output.pdf", SDFDoc.SaveOptions.e_linearized);
                Console.WriteLine("PDF created successfully");
            }
            else
            {
                Console.WriteLine($"Conversion failed: {converter.GetLog()}");
            }
        }

        PDFNet.Terminate();
    }
}
using pdftron;
using pdftron.PDF;

class Program
{
    static void Main()
    {
        PDFNet.Initialize("YOUR_LICENSE_KEY");
        PDFNet.SetResourcesPath("path/to/resources");

        string html = "<html><body><h1>Hello World</h1><p>Content here</p></body></html>";

        using (PDFDoc doc = new PDFDoc())
        {
            HTML2PDF converter = new HTML2PDF();
            converter.SetModulePath("path/to/html2pdf");
            converter.InsertFromHtmlString(html);

            HTML2PDF.WebPageSettings settings = new HTML2PDF.WebPageSettings();
            settings.SetPrintBackground(true);
            settings.SetLoadImages(true);

            if (converter.Convert(doc))
            {
                doc.Save("output.pdf", SDFDoc.SaveOptions.e_linearized);
                Console.WriteLine("PDF created successfully");
            }
            else
            {
                Console.WriteLine($"Conversion failed: {converter.GetLog()}");
            }
        }

        PDFNet.Terminate();
    }
}
Imports pdftron
Imports pdftron.PDF

Class Program
    Shared Sub Main()
        PDFNet.Initialize("YOUR_LICENSE_KEY")
        PDFNet.SetResourcesPath("path/to/resources")

        Dim html As String = "<html><body><h1>Hello World</h1><p>Content here</p></body></html>"

        Using doc As New PDFDoc()
            Dim converter As New HTML2PDF()
            converter.SetModulePath("path/to/html2pdf")
            converter.InsertFromHtmlString(html)

            Dim settings As New HTML2PDF.WebPageSettings()
            settings.SetPrintBackground(True)
            settings.SetLoadImages(True)

            If converter.Convert(doc) Then
                doc.Save("output.pdf", SDFDoc.SaveOptions.e_linearized)
                Console.WriteLine("PDF created successfully")
            Else
                Console.WriteLine($"Conversion failed: {converter.GetLog()}")
            End If
        End Using

        PDFNet.Terminate()
    End Sub
End Class
$vbLabelText   $csharpLabel

IronPDF 实现：

// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();

        string html = "<html><body><h1>Hello World</h1></body></html>";
        var pdf = renderer.RenderHtmlAsPdf(html);

        pdf.SaveAs("output.pdf");
    }
}
// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();

        string html = "<html><body><h1>Hello World</h1></body></html>";
        var pdf = renderer.RenderHtmlAsPdf(html);

        pdf.SaveAs("output.pdf");
    }
}
Imports IronPdf

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()

        Dim html As String = "<html><body><h1>Hello World</h1></body></html>"
        Dim pdf = renderer.RenderHtmlAsPdf(html)

        pdf.SaveAs("output.pdf")
    End Sub
End Class
$vbLabelText   $csharpLabel

IronPDF 消除了初始化、模块路径和清理代码，将 35 行以上的代码减少到 5 行。

URL到PDF转换

Apryse PDF 实现：

using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc())
{
    HTML2PDF converter = new HTML2PDF();
    converter.SetModulePath("path/to/html2pdf");

    HTML2PDF.WebPageSettings settings = new HTML2PDF.WebPageSettings();
    settings.SetLoadImages(true);
    settings.SetAllowJavaScript(true);
    settings.SetPrintBackground(true);

    converter.InsertFromURL("https://example.com", settings);

    if (converter.Convert(doc))
    {
        doc.Save("webpage.pdf", SDFDoc.SaveOptions.e_linearized);
    }
}

PDFNet.Terminate();
using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc())
{
    HTML2PDF converter = new HTML2PDF();
    converter.SetModulePath("path/to/html2pdf");

    HTML2PDF.WebPageSettings settings = new HTML2PDF.WebPageSettings();
    settings.SetLoadImages(true);
    settings.SetAllowJavaScript(true);
    settings.SetPrintBackground(true);

    converter.InsertFromURL("https://example.com", settings);

    if (converter.Convert(doc))
    {
        doc.Save("webpage.pdf", SDFDoc.SaveOptions.e_linearized);
    }
}

PDFNet.Terminate();
Imports pdftron
Imports pdftron.PDF

PDFNet.Initialize("YOUR_LICENSE_KEY")

Using doc As New PDFDoc()
    Dim converter As New HTML2PDF()
    converter.SetModulePath("path/to/html2pdf")

    Dim settings As New HTML2PDF.WebPageSettings()
    settings.SetLoadImages(True)
    settings.SetAllowJavaScript(True)
    settings.SetPrintBackground(True)

    converter.InsertFromURL("https://example.com", settings)

    If converter.Convert(doc) Then
        doc.Save("webpage.pdf", SDFDoc.SaveOptions.e_linearized)
    End If
End Using

PDFNet.Terminate()
$vbLabelText   $csharpLabel

IronPDF 实现：

// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();

        string url = "https://www.example.com";
        var pdf = renderer.RenderUrlAsPdf(url);

        pdf.SaveAs("webpage.pdf");
    }
}
// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();

        string url = "https://www.example.com";
        var pdf = renderer.RenderUrlAsPdf(url);

        pdf.SaveAs("webpage.pdf");
    }
}
Imports IronPdf

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()

        Dim url As String = "https://www.example.com"
        Dim pdf = renderer.RenderUrlAsPdf(url)

        pdf.SaveAs("webpage.pdf")
    End Sub
End Class
$vbLabelText   $csharpLabel

合并多个 PDF 文件

Apryse PDF 实现：

using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc mainDoc = new PDFDoc())
{
    string[] files = { "doc1.pdf", "doc2.pdf", "doc3.pdf" };

    foreach (string file in files)
    {
        using (PDFDoc doc = new PDFDoc(file))
        {
            mainDoc.AppendPages(doc, 1, doc.GetPageCount());
        }
    }

    mainDoc.Save("merged.pdf", SDFDoc.SaveOptions.e_linearized);
}

PDFNet.Terminate();
using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc mainDoc = new PDFDoc())
{
    string[] files = { "doc1.pdf", "doc2.pdf", "doc3.pdf" };

    foreach (string file in files)
    {
        using (PDFDoc doc = new PDFDoc(file))
        {
            mainDoc.AppendPages(doc, 1, doc.GetPageCount());
        }
    }

    mainDoc.Save("merged.pdf", SDFDoc.SaveOptions.e_linearized);
}

PDFNet.Terminate();
Imports pdftron
Imports pdftron.PDF

PDFNet.Initialize("YOUR_LICENSE_KEY")

Using mainDoc As New PDFDoc()
    Dim files As String() = {"doc1.pdf", "doc2.pdf", "doc3.pdf"}

    For Each file As String In files
        Using doc As New PDFDoc(file)
            mainDoc.AppendPages(doc, 1, doc.GetPageCount())
        End Using
    Next

    mainDoc.Save("merged.pdf", SDFDoc.SaveOptions.e_linearized)
End Using

PDFNet.Terminate()
$vbLabelText   $csharpLabel

IronPDF 实现：

// NuGet: Install-Package IronPdf
using IronPdf;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        var pdf1 = PdfDocument.FromFile("document1.pdf");
        var pdf2 = PdfDocument.FromFile("document2.pdf");

        var merged = PdfDocument.Merge(new List<PdfDocument> { pdf1, pdf2 });

        merged.SaveAs("merged.pdf");
    }
}
// NuGet: Install-Package IronPdf
using IronPdf;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        var pdf1 = PdfDocument.FromFile("document1.pdf");
        var pdf2 = PdfDocument.FromFile("document2.pdf");

        var merged = PdfDocument.Merge(new List<PdfDocument> { pdf1, pdf2 });

        merged.SaveAs("merged.pdf");
    }
}
Imports IronPdf
Imports System.Collections.Generic

Class Program
    Shared Sub Main()
        Dim pdf1 = PdfDocument.FromFile("document1.pdf")
        Dim pdf2 = PdfDocument.FromFile("document2.pdf")

        Dim merged = PdfDocument.Merge(New List(Of PdfDocument) From {pdf1, pdf2})

        merged.SaveAs("merged.pdf")
    End Sub
End Class
$vbLabelText   $csharpLabel

IronPDF 的静态 Merge 方法直接接受多个文档，消除了页面迭代模式。

文本提取

Apryse PDF 实现：

using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc("document.pdf"))
{
    TextExtractor extractor = new TextExtractor();

    for (int i = 1; i <= doc.GetPageCount(); i++)
    {
        Page page = doc.GetPage(i);
        extractor.Begin(page);

        string pageText = extractor.GetAsText();
        Console.WriteLine($"Page {i}:");
        Console.WriteLine(pageText);
    }
}

PDFNet.Terminate();
using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc("document.pdf"))
{
    TextExtractor extractor = new TextExtractor();

    for (int i = 1; i <= doc.GetPageCount(); i++)
    {
        Page page = doc.GetPage(i);
        extractor.Begin(page);

        string pageText = extractor.GetAsText();
        Console.WriteLine($"Page {i}:");
        Console.WriteLine(pageText);
    }
}

PDFNet.Terminate();
Imports pdftron
Imports pdftron.PDF

PDFNet.Initialize("YOUR_LICENSE_KEY")

Using doc As New PDFDoc("document.pdf")
    Dim extractor As New TextExtractor()

    For i As Integer = 1 To doc.GetPageCount()
        Dim page As Page = doc.GetPage(i)
        extractor.Begin(page)

        Dim pageText As String = extractor.GetAsText()
        Console.WriteLine($"Page {i}:")
        Console.WriteLine(pageText)
    Next
End Using

PDFNet.Terminate()
$vbLabelText   $csharpLabel

IronPDF 实现：

using IronPdf;

var pdf = PdfDocument.FromFile("document.pdf");

// Extract all text at once
string allText = pdf.ExtractAllText();
Console.WriteLine(allText);

// Extract from specific page
string page1Text = pdf.ExtractTextFromPage(0); // 0-indexed
Console.WriteLine($"Page 1: {page1Text}");
using IronPdf;

var pdf = PdfDocument.FromFile("document.pdf");

// Extract all text at once
string allText = pdf.ExtractAllText();
Console.WriteLine(allText);

// Extract from specific page
string page1Text = pdf.ExtractTextFromPage(0); // 0-indexed
Console.WriteLine($"Page 1: {page1Text}");
Imports IronPdf

Dim pdf = PdfDocument.FromFile("document.pdf")

' Extract all text at once
Dim allText As String = pdf.ExtractAllText()
Console.WriteLine(allText)

' Extract from specific page
Dim page1Text As String = pdf.ExtractTextFromPage(0) ' 0-indexed
Console.WriteLine($"Page 1: {page1Text}")
$vbLabelText   $csharpLabel

添加水印

Apryse PDF 实现：

using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc("document.pdf"))
{
    Stamper stamper = new Stamper(Stamper.SizeType.e_relative_scale, 0.5, 0.5);
    stamper.SetAlignment(Stamper.HorizontalAlignment.e_horizontal_center,
                         Stamper.VerticalAlignment.e_vertical_center);
    stamper.SetOpacity(0.3);
    stamper.SetRotation(45);
    stamper.SetFontColor(new ColorPt(1, 0, 0));
    stamper.SetTextAlignment(Stamper.TextAlignment.e_align_center);

    stamper.StampText(doc, "CONFIDENTIAL",
        new PageSet(1, doc.GetPageCount()));

    doc.Save("watermarked.pdf", SDFDoc.SaveOptions.e_linearized);
}

PDFNet.Terminate();
using pdftron;
using pdftron.PDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc("document.pdf"))
{
    Stamper stamper = new Stamper(Stamper.SizeType.e_relative_scale, 0.5, 0.5);
    stamper.SetAlignment(Stamper.HorizontalAlignment.e_horizontal_center,
                         Stamper.VerticalAlignment.e_vertical_center);
    stamper.SetOpacity(0.3);
    stamper.SetRotation(45);
    stamper.SetFontColor(new ColorPt(1, 0, 0));
    stamper.SetTextAlignment(Stamper.TextAlignment.e_align_center);

    stamper.StampText(doc, "CONFIDENTIAL",
        new PageSet(1, doc.GetPageCount()));

    doc.Save("watermarked.pdf", SDFDoc.SaveOptions.e_linearized);
}

PDFNet.Terminate();
Imports pdftron
Imports pdftron.PDF

PDFNet.Initialize("YOUR_LICENSE_KEY")

Using doc As New PDFDoc("document.pdf")
    Dim stamper As New Stamper(Stamper.SizeType.e_relative_scale, 0.5, 0.5)
    stamper.SetAlignment(Stamper.HorizontalAlignment.e_horizontal_center, Stamper.VerticalAlignment.e_vertical_center)
    stamper.SetOpacity(0.3)
    stamper.SetRotation(45)
    stamper.SetFontColor(New ColorPt(1, 0, 0))
    stamper.SetTextAlignment(Stamper.TextAlignment.e_align_center)

    stamper.StampText(doc, "CONFIDENTIAL", New PageSet(1, doc.GetPageCount()))

    doc.Save("watermarked.pdf", SDFDoc.SaveOptions.e_linearized)
End Using

PDFNet.Terminate()
$vbLabelText   $csharpLabel

IronPDF 实现：

using IronPdf;
using IronPdf.Editing;

var pdf = PdfDocument.FromFile("document.pdf");

// HTML-based watermark with full styling control
string watermarkHtml = @"
<div style='
    color: red;
    opacity: 0.3;
    font-size: 72px;
    font-weight: bold;
    text-align: center;
'>CONFIDENTIAL</div>";

pdf.ApplyWatermark(watermarkHtml,
    rotation: 45,
    verticalAlignment: VerticalAlignment.Middle,
    horizontalAlignment: HorizontalAlignment.Center);

pdf.SaveAs("watermarked.pdf");
using IronPdf;
using IronPdf.Editing;

var pdf = PdfDocument.FromFile("document.pdf");

// HTML-based watermark with full styling control
string watermarkHtml = @"
<div style='
    color: red;
    opacity: 0.3;
    font-size: 72px;
    font-weight: bold;
    text-align: center;
'>CONFIDENTIAL</div>";

pdf.ApplyWatermark(watermarkHtml,
    rotation: 45,
    verticalAlignment: VerticalAlignment.Middle,
    horizontalAlignment: HorizontalAlignment.Center);

pdf.SaveAs("watermarked.pdf");
Imports IronPdf
Imports IronPdf.Editing

Dim pdf = PdfDocument.FromFile("document.pdf")

' HTML-based watermark with full styling control
Dim watermarkHtml As String = "
<div style='
    color: red;
    opacity: 0.3;
    font-size: 72px;
    font-weight: bold;
    text-align: center;
'>CONFIDENTIAL</div>"

pdf.ApplyWatermark(watermarkHtml,
    rotation:=45,
    verticalAlignment:=VerticalAlignment.Middle,
    horizontalAlignment:=HorizontalAlignment.Center)

pdf.SaveAs("watermarked.pdf")
$vbLabelText   $csharpLabel

IronPDF 使用基于 HTML/CSS 的水印技术，通过熟悉的 Web 技术提供完整的样式控制。

密码保护

Apryse PDF 实现：

using pdftron;
using pdftron.PDF;
using pdftron.SDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc("document.pdf"))
{
    SecurityHandler handler = new SecurityHandler();
    handler.ChangeUserPassword("user123");
    handler.ChangeMasterPassword("owner456");

    handler.SetPermission(SecurityHandler.Permission.e_print, false);
    handler.SetPermission(SecurityHandler.Permission.e_extract_content, false);

    doc.SetSecurityHandler(handler);
    doc.Save("protected.pdf", SDFDoc.SaveOptions.e_linearized);
}

PDFNet.Terminate();
using pdftron;
using pdftron.PDF;
using pdftron.SDF;

PDFNet.Initialize("YOUR_LICENSE_KEY");

using (PDFDoc doc = new PDFDoc("document.pdf"))
{
    SecurityHandler handler = new SecurityHandler();
    handler.ChangeUserPassword("user123");
    handler.ChangeMasterPassword("owner456");

    handler.SetPermission(SecurityHandler.Permission.e_print, false);
    handler.SetPermission(SecurityHandler.Permission.e_extract_content, false);

    doc.SetSecurityHandler(handler);
    doc.Save("protected.pdf", SDFDoc.SaveOptions.e_linearized);
}

PDFNet.Terminate();
Imports pdftron
Imports pdftron.PDF
Imports pdftron.SDF

PDFNet.Initialize("YOUR_LICENSE_KEY")

Using doc As New PDFDoc("document.pdf")
    Dim handler As New SecurityHandler()
    handler.ChangeUserPassword("user123")
    handler.ChangeMasterPassword("owner456")

    handler.SetPermission(SecurityHandler.Permission.e_print, False)
    handler.SetPermission(SecurityHandler.Permission.e_extract_content, False)

    doc.SetSecurityHandler(handler)
    doc.Save("protected.pdf", SDFDoc.SaveOptions.e_linearized)
End Using

PDFNet.Terminate()
$vbLabelText   $csharpLabel

IronPDF 实现：

using IronPdf;

var pdf = PdfDocument.FromFile("document.pdf");

// Set passwords
pdf.SecuritySettings.UserPassword = "user123";
pdf.SecuritySettings.OwnerPassword = "owner456";

// Set permissions
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.NoPrint;
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserEdits = PdfEditSecurity.NoEdit;

pdf.SaveAs("protected.pdf");
using IronPdf;

var pdf = PdfDocument.FromFile("document.pdf");

// Set passwords
pdf.SecuritySettings.UserPassword = "user123";
pdf.SecuritySettings.OwnerPassword = "owner456";

// Set permissions
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.NoPrint;
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserEdits = PdfEditSecurity.NoEdit;

pdf.SaveAs("protected.pdf");
Imports IronPdf

Dim pdf = PdfDocument.FromFile("document.pdf")

' Set passwords
pdf.SecuritySettings.UserPassword = "user123"
pdf.SecuritySettings.OwnerPassword = "owner456"

' Set permissions
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.NoPrint
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserEdits = PdfEditSecurity.NoEdit

pdf.SaveAs("protected.pdf")
$vbLabelText   $csharpLabel

页眉和页脚

IronPDF 实现：

using IronPdf;

var renderer = new ChromePdfRenderer();

renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:center; font-size:12px;'>Company Header</div>",
    DrawDividerLine = true,
    MaxHeight = 30
};

renderer.RenderingOptions.HtmlFooter = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:center; font-size:10px;'>Page {page} of {total-pages}</div>",
    DrawDividerLine = true,
    MaxHeight = 25
};

var pdf = renderer.RenderHtmlAsPdf("<h1>Content</h1>");
pdf.SaveAs("with_headers.pdf");
using IronPdf;

var renderer = new ChromePdfRenderer();

renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:center; font-size:12px;'>Company Header</div>",
    DrawDividerLine = true,
    MaxHeight = 30
};

renderer.RenderingOptions.HtmlFooter = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:center; font-size:10px;'>Page {page} of {total-pages}</div>",
    DrawDividerLine = true,
    MaxHeight = 25
};

var pdf = renderer.RenderHtmlAsPdf("<h1>Content</h1>");
pdf.SaveAs("with_headers.pdf");
Imports IronPdf

Dim renderer As New ChromePdfRenderer()

renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter With {
    .HtmlFragment = "<div style='text-align:center; font-size:12px;'>Company Header</div>",
    .DrawDividerLine = True,
    .MaxHeight = 30
}

renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .HtmlFragment = "<div style='text-align:center; font-size:10px;'>Page {page} of {total-pages}</div>",
    .DrawDividerLine = True,
    .MaxHeight = 25
}

Dim pdf = renderer.RenderHtmlAsPdf("<h1>Content</h1>")
pdf.SaveAs("with_headers.pdf")
$vbLabelText   $csharpLabel

IronPDF 支持像 {page} 和 {total-pages} 这样的占位符标记，用于动态页码。 有关更多选项，请参阅页眉和页脚文档。

ASP.NET Core 集成

Apryse PDF 的初始化要求使网络应用程序集成变得复杂。IronPDF简化了这种模式。

IronPDF模式：

[ApiController]
[Route("[controller]")]
public class PdfController : ControllerBase
{
    [HttpGet("generate")]
    public IActionResult GeneratePdf()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<h1>Report</h1>");

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

    [HttpGet("generate-async")]
    public async Task<IActionResult> GeneratePdfAsync()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = await renderer.RenderHtmlAsPdfAsync("<h1>Report</h1>");

        return File(pdf.Stream, "application/pdf", "report.pdf");
    }
}
[ApiController]
[Route("[controller]")]
public class PdfController : ControllerBase
{
    [HttpGet("generate")]
    public IActionResult GeneratePdf()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<h1>Report</h1>");

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

    [HttpGet("generate-async")]
    public async Task<IActionResult> GeneratePdfAsync()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = await renderer.RenderHtmlAsPdfAsync("<h1>Report</h1>");

        return File(pdf.Stream, "application/pdf", "report.pdf");
    }
}
Imports Microsoft.AspNetCore.Mvc

<ApiController>
<Route("[controller]")>
Public Class PdfController
    Inherits ControllerBase

    <HttpGet("generate")>
    Public Function GeneratePdf() As IActionResult
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderHtmlAsPdf("<h1>Report</h1>")

        Return File(pdf.BinaryData, "application/pdf", "report.pdf")
    End Function

    <HttpGet("generate-async")>
    Public Async Function GeneratePdfAsync() As Task(Of IActionResult)
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = Await renderer.RenderHtmlAsPdfAsync("<h1>Report</h1>")

        Return File(pdf.Stream, "application/pdf", "report.pdf")
    End Function
End Class
$vbLabelText   $csharpLabel

依赖注入配置

// Program.cs
public void ConfigureServices(IServiceCollection services)
{
    // Set license once
    IronPdf.License.LicenseKey = Configuration["IronPdf:LicenseKey"];

    // Register renderer as scoped service
    services.AddScoped<ChromePdfRenderer>();

    // Or create a wrapper service
    services.AddScoped<IPdfService, IronPdfService>();
}

// IronPdfService.cs
public class IronPdfService : IPdfService
{
    private readonly ChromePdfRenderer _renderer;

    public IronPdfService()
    {
        _renderer = new ChromePdfRenderer();
        _renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;
    }

    public PdfDocument GenerateFromHtml(string html) =>
        _renderer.RenderHtmlAsPdf(html);

    public Task<PdfDocument> GenerateFromHtmlAsync(string html) =>
        _renderer.RenderHtmlAsPdfAsync(html);
}
// Program.cs
public void ConfigureServices(IServiceCollection services)
{
    // Set license once
    IronPdf.License.LicenseKey = Configuration["IronPdf:LicenseKey"];

    // Register renderer as scoped service
    services.AddScoped<ChromePdfRenderer>();

    // Or create a wrapper service
    services.AddScoped<IPdfService, IronPdfService>();
}

// IronPdfService.cs
public class IronPdfService : IPdfService
{
    private readonly ChromePdfRenderer _renderer;

    public IronPdfService()
    {
        _renderer = new ChromePdfRenderer();
        _renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;
    }

    public PdfDocument GenerateFromHtml(string html) =>
        _renderer.RenderHtmlAsPdf(html);

    public Task<PdfDocument> GenerateFromHtmlAsync(string html) =>
        _renderer.RenderHtmlAsPdfAsync(html);
}
' Program.vb
Public Sub ConfigureServices(services As IServiceCollection)
    ' Set license once
    IronPdf.License.LicenseKey = Configuration("IronPdf:LicenseKey")

    ' Register renderer as scoped service
    services.AddScoped(Of ChromePdfRenderer)()

    ' Or create a wrapper service
    services.AddScoped(Of IPdfService, IronPdfService)()
End Sub

' IronPdfService.vb
Public Class IronPdfService
    Implements IPdfService

    Private ReadOnly _renderer As ChromePdfRenderer

    Public Sub New()
        _renderer = New ChromePdfRenderer()
        _renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
        _renderer.RenderingOptions.PrintHtmlBackgrounds = True
    End Sub

    Public Function GenerateFromHtml(html As String) As PdfDocument Implements IPdfService.GenerateFromHtml
        Return _renderer.RenderHtmlAsPdf(html)
    End Function

    Public Function GenerateFromHtmlAsync(html As String) As Task(Of PdfDocument) Implements IPdfService.GenerateFromHtmlAsync
        Return _renderer.RenderHtmlAsPdfAsync(html)
    End Function
End Class
$vbLabelText   $csharpLabel

性能比较

指标 Apryse PDF IronPDF
冷启动 快速（本地代码） ~2s (Chromium init)
后续渲染 快速 快速
复杂的 HTML 变量（html2pdf 模块） 优秀（Chromium）
CSS 支持。 有限的 完整的 CSS3
JavaScript语言 有限的 支持

性能优化技巧

// 1. Reuse renderer instance
private static readonly ChromePdfRenderer SharedRenderer = new ChromePdfRenderer();

// 2. Disable unnecessary features for speed
var renderer = new ChromePdfRenderer();
renderer.RenderingOptions.EnableJavaScript = false; // If not needed
renderer.RenderingOptions.WaitFor.RenderDelay(0);   // No delay
renderer.RenderingOptions.Timeout = 30000;          // 30s max

// 3. Proper disposal
using (var pdf = renderer.RenderHtmlAsPdf(html))
{
    pdf.SaveAs("output.pdf");
}
// 1. Reuse renderer instance
private static readonly ChromePdfRenderer SharedRenderer = new ChromePdfRenderer();

// 2. Disable unnecessary features for speed
var renderer = new ChromePdfRenderer();
renderer.RenderingOptions.EnableJavaScript = false; // If not needed
renderer.RenderingOptions.WaitFor.RenderDelay(0);   // No delay
renderer.RenderingOptions.Timeout = 30000;          // 30s max

// 3. Proper disposal
using (var pdf = renderer.RenderHtmlAsPdf(html))
{
    pdf.SaveAs("output.pdf");
}
' 1. Reuse renderer instance
Private Shared ReadOnly SharedRenderer As New ChromePdfRenderer()

' 2. Disable unnecessary features for speed
Dim renderer As New ChromePdfRenderer()
renderer.RenderingOptions.EnableJavaScript = False ' If not needed
renderer.RenderingOptions.WaitFor.RenderDelay(0)   ' No delay
renderer.RenderingOptions.Timeout = 30000          ' 30s max

' 3. Proper disposal
Using pdf = renderer.RenderHtmlAsPdf(html)
    pdf.SaveAs("output.pdf")
End Using
$vbLabelText   $csharpLabel

常见迁移问题的故障排除

问题：模块路径错误

移除所有模块路径配置-IronPDF 的 Chromium 引擎是内置的：

// Remove this
converter.SetModulePath("path/to/html2pdf");

// Just use the renderer
var renderer = new ChromePdfRenderer();
// Remove this
converter.SetModulePath("path/to/html2pdf");

// Just use the renderer
var renderer = new ChromePdfRenderer();
$vbLabelText   $csharpLabel

问题：PDFNet.Initialize() 未找到

替换为IronPDF许可证设置：

// Remove this
PDFNet.Initialize("KEY");
PDFNet.SetResourcesPath("path");

// Use this (optional for development)
IronPdf.License.LicenseKey = "YOUR-KEY";
// Remove this
PDFNet.Initialize("KEY");
PDFNet.SetResourcesPath("path");

// Use this (optional for development)
IronPdf.License.LicenseKey = "YOUR-KEY";
' Remove this
PDFNet.Initialize("KEY")
PDFNet.SetResourcesPath("path")

' Use this (optional for development)
IronPdf.License.LicenseKey = "YOUR-KEY"
$vbLabelText   $csharpLabel

问题：PDFViewCtrl 替换

IronPDF 不包含查看器控件。 选项：

  • 使用 PDF.js 制作网络浏览器
  • 使用系统 PDF 查看器
  • 考虑使用第三方查看器组件

迁移后核对表

完成代码迁移后，请验证以下内容：

  • 验证 PDF 输出质量是否符合预期
  • 测试所有极端情况（大型文档、复杂的 CSS）
  • 比较性能指标
  • 如果需要，更新 Docker 配置
  • 移除 Apryse 许可证及相关配置
  • 记录所有IronPDF特有的配置
  • 培训团队掌握新的 API 模式
  • 如有需要，更新 CI/CD 流水线

未来保护您的 PDF 基础架构

.NET10即将推出，C# 14也将引入新的语言特性，因此选择具有现代约定的本地.NET PDF 库可以确保与不断发展的运行时功能兼容。IronPDFfor .NET 承诺支持最新的 .NET 版本，这意味着您的迁移投资将在项目扩展到 2025 年和 2026 年时获得回报--无需每年续订。

其他资源

从Apryse PDF迁移到IronPDF可将您的 PDF 代码库从复杂的 C++ 模式转换为惯用的 C#。 消除初始化模板、模块路径配置和基于订阅的许可可立即提高生产率，同时降低长期成本。

Curtis Chau
Curtis Chau
  立即与工程团队聊天
技术作家

Curtis Chau 拥有卡尔顿大学的计算机科学学士学位，专注于前端开发，精通 Node.js、TypeScript、JavaScript 和 React。他热衷于打造直观且美观的用户界面，喜欢使用现代框架并创建结构良好、视觉吸引力强的手册。

除了开发之外，Curtis 对物联网 (IoT) 有浓厚的兴趣，探索将硬件和软件集成的新方法。在空闲时间，他喜欢玩游戏和构建 Discord 机器人，将他对技术的热爱与创造力相结合。

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