Iron Suite for .NET

10個 .NET 程式庫。一個完整的文件套件。

探索 Iron Suite

IRONPDF

IRONWORD

IRONXL

IRONPPT

IRONOCR

IRONBARCODE

IRONQR

IRONPRINT

IRONZIP

IRONWEBSCRAPER

比較

Apache PDFBox與IronPDF：技術比較指南

Curtis Chau

Updated: 2026年6月28日

當.NET開發人員評估企業級PDF解決方案時，Foxit SDK憑藉其可靠的文件處理功能脫穎而出。然而，其複雜的授權系統、手動安裝要求以及冗長的API模式讓許多團隊考慮其他替代方案。 IronPDF提供了現代化的方法，簡單的NuGet安裝，內建HTML到PDF轉換，專為.NET開發人員設計的API模式。

本比較檢視這些程式庫在技術相關維度上的表現，以幫助專業開發者和架構師為他們的 .NET PDF 需求做出明智的決定。

了解Foxit SDK

Foxit SDK是一個企業級PDF程式庫，設計用於完整的C#文件處理。該程式庫提供了強大的PDF建立、編輯和管理功能，適合需要詳細自訂和高級操作的大規模應用。

Foxit SDK使用HTML2PDFSettingData進行HTML轉換，需要明確配置頁面尺寸、頁面模式和其他設置。浮水印使用獨立的WatermarkSettings類別，帶有字體定義和定位參數。

該程式庫需要手動的DLL引用或私人NuGet源，沒有簡單的公共NuGet包可用。 HTML到PDF轉換需要單獨購買附加組件，API模式反映了C++的起源，在現代C#開發中感覺不太自然。

了解IronPDF

IronPDF是一個.NET PDF程式庫，使用Chromium渲染引擎進行HTML到PDF轉換，提供對現代網頁標準的內建支持。該程式庫提供了簡單的NuGet安裝和專為.NET開發人員設計的API模式。

IronPDF使用RenderUrlAsPdf()等直觀的方法。浮水印使用TextStamper，具有簡單明瞭的屬性來控制文字、字體大小、不透明度、旋轉和對齊。該程式庫支持標準.NET模式，包括IDisposable進行自動資源清理和基於例外的錯誤處理。

架構和 API 設計比較

這些.NET PDF程式庫之間的根本區別在於它們的API理念和安裝方法。

方面	Foxit SDK	IronPDF
安裝	手動DLLs/私人來源	簡單的 NuGet 套件
授權	複雜，重點面向企業	透明，所有尺寸
初始化	`Library.Initialize(sn, key)` + `Library.Release()`	僅需一次設置授權金鑰
錯誤處理	ErrorCode枚舉	標準.NET例外
HTML到PDF	單獨附加組件	內建Chromium
API風格	C++遺產，冗長	現代.NET模式
資源清理	手動`Release()`	IDisposable/自動
文件	企業文件	公共教程

Foxit SDK的複雜授權系統包含多個產品、SKU和多種型別的授權（每開發人員、每伺服器、OEM等），使得選擇合適的選項困難。企業導向的定價對於較小的團隊來說可能是禁止的。 IronPDF提供透明的授權，適合各種規模的企業。

程式碼比較：常見的 PDF 操作

HTML 到 PDF 轉換

最基本的操作顯示出API的複雜性差異。

Foxit SDK:

// NuGet: Install-Package Foxit.SDK
using Foxit.SDK;
using Foxit.SDK.Common;
using Foxit.SDK.PDFConversion;
using System;

class Program
{
    static void Main()
    {
        Library.Initialize("sn", "key");
        
        HTML2PDFSettingData settingData = new HTML2PDFSettingData();
        settingData.page_width = 612.0f;
        settingData.page_height = 792.0f;
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage;
        
        using (HTML2PDF html2pdf = new HTML2PDF(settingData))
        {
            html2pdf.Convert("<html><body><h1>Hello World</h1></body></html>", "output.pdf");
        }
        
        Library.Release();
    }
}

// NuGet: Install-Package Foxit.SDK
using Foxit.SDK;
using Foxit.SDK.Common;
using Foxit.SDK.PDFConversion;
using System;

class Program
{
    static void Main()
    {
        Library.Initialize("sn", "key");
        
        HTML2PDFSettingData settingData = new HTML2PDFSettingData();
        settingData.page_width = 612.0f;
        settingData.page_height = 792.0f;
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage;
        
        using (HTML2PDF html2pdf = new HTML2PDF(settingData))
        {
            html2pdf.Convert("<html><body><h1>Hello World</h1></body></html>", "output.pdf");
        }
        
        Library.Release();
    }
}

' NuGet: Install-Package Foxit.SDK
Imports Foxit.SDK
Imports Foxit.SDK.Common
Imports Foxit.SDK.PDFConversion
Imports System

Module Program
    Sub Main()
        Library.Initialize("sn", "key")

        Dim settingData As New HTML2PDFSettingData()
        settingData.page_width = 612.0F
        settingData.page_height = 792.0F
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage

        Using html2pdf As New HTML2PDF(settingData)
            html2pdf.Convert("<html><body><h1>Hello World</h1></body></html>", "output.pdf")
        End Using

        Library.Release()
    End Sub
End Module

' NuGet: Install-Package Foxit.SDK
Imports Foxit.SDK
Imports Foxit.SDK.Common
Imports Foxit.SDK.PDFConversion
Imports System

Module Program
    Sub Main()
        Library.Initialize("sn", "key")

        Dim settingData As New HTML2PDFSettingData()
        settingData.page_width = 612.0F
        settingData.page_height = 792.0F
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage

        Using html2pdf As New HTML2PDF(settingData)
            html2pdf.Convert("<html><body><h1>Hello World</h1></body></html>", "output.pdf")
        End Using

        Library.Release()
    End Sub
End Module

IronPDF：

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<html><body><h1>Hello World</h1></body></html>");
        pdf.SaveAs("output.pdf");
    }
}

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<html><body><h1>Hello World</h1></body></html>");
        pdf.SaveAs("output.pdf");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderHtmlAsPdf("<html><body><h1>Hello World</h1></body></html>")
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderHtmlAsPdf("<html><body><h1>Hello World</h1></body></html>")
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Foxit SDK需要Library.Release()。整個工作流程涉及多個配置物件和生命周期管理調用。

IronPDF建立一個SaveAs()保存，僅需三行程式碼且無需初始化或清理儀式。

想了解進階HTML渲染選項，請參閱HTML到PDF轉換指南。

URL到PDF轉換

轉換網頁為PDF也遵循類似的模式。

Foxit SDK:

// NuGet: Install-Package Foxit.SDK
using Foxit.SDK;
using Foxit.SDK.Common;
using Foxit.SDK.PDFConversion;
using System;

class Program
{
    static void Main()
    {
        Library.Initialize("sn", "key");
        
        HTML2PDFSettingData settingData = new HTML2PDFSettingData();
        settingData.page_width = 612.0f;
        settingData.page_height = 792.0f;
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage;
        
        using (HTML2PDF html2pdf = new HTML2PDF(settingData))
        {
            html2pdf.ConvertFromURL("https://www.example.com", "output.pdf");
        }
        
        Library.Release();
    }
}

// NuGet: Install-Package Foxit.SDK
using Foxit.SDK;
using Foxit.SDK.Common;
using Foxit.SDK.PDFConversion;
using System;

class Program
{
    static void Main()
    {
        Library.Initialize("sn", "key");
        
        HTML2PDFSettingData settingData = new HTML2PDFSettingData();
        settingData.page_width = 612.0f;
        settingData.page_height = 792.0f;
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage;
        
        using (HTML2PDF html2pdf = new HTML2PDF(settingData))
        {
            html2pdf.ConvertFromURL("https://www.example.com", "output.pdf");
        }
        
        Library.Release();
    }
}

' NuGet: Install-Package Foxit.SDK
Imports Foxit.SDK
Imports Foxit.SDK.Common
Imports Foxit.SDK.PDFConversion
Imports System

Module Program
    Sub Main()
        Library.Initialize("sn", "key")
        
        Dim settingData As New HTML2PDFSettingData()
        settingData.page_width = 612.0F
        settingData.page_height = 792.0F
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage
        
        Using html2pdf As New HTML2PDF(settingData)
            html2pdf.ConvertFromURL("https://www.example.com", "output.pdf")
        End Using
        
        Library.Release()
    End Sub
End Module

' NuGet: Install-Package Foxit.SDK
Imports Foxit.SDK
Imports Foxit.SDK.Common
Imports Foxit.SDK.PDFConversion
Imports System

Module Program
    Sub Main()
        Library.Initialize("sn", "key")
        
        Dim settingData As New HTML2PDFSettingData()
        settingData.page_width = 612.0F
        settingData.page_height = 792.0F
        settingData.page_mode = HTML2PDFPageMode.e_HTML2PDFPageModeSinglePage
        
        Using html2pdf As New HTML2PDF(settingData)
            html2pdf.ConvertFromURL("https://www.example.com", "output.pdf")
        End Using
        
        Library.Release()
    End Sub
End Module

IronPDF：

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderUrlAsPdf("https://www.example.com");
        pdf.SaveAs("output.pdf");
    }
}

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderUrlAsPdf("https://www.example.com");
        pdf.SaveAs("output.pdf");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderUrlAsPdf("https://www.example.com")
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderUrlAsPdf("https://www.example.com")
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Foxit SDK在ConvertFromURL()類別中使用相同的初始化/配置/清理模式。 IronPDF使用RenderUrlAsPdf()直接輸出文件保存。

了解更多關於URL渲染的資訊，請參閱URL到PDF文件。

新增浮水印

浮水印演示了物件模型的複雜性差異。

Foxit SDK:

// NuGet: Install-Package Foxit.SDK
using Foxit.SDK;
using Foxit.SDK.Common;
using Foxit.SDK.PDFDoc;
using System;

class Program
{
    static void Main()
    {
        Library.Initialize("sn", "key");
        
        using (PDFDoc doc = new PDFDoc("input.pdf"))
        {
            doc.Load("");
            
            Watermark watermark = new Watermark(doc, "Confidential", 
                new Font(Font.StandardID.e_StdIDHelvetica), 48.0f, 0xFF0000FF);
            
            WatermarkSettings settings = new WatermarkSettings();
            settings.flags = Watermark.e_WatermarkFlagASPageContents;
            settings.position = Watermark.Position.e_PosCenter;
            settings.rotation = -45.0f;
            settings.opacity = 0.5f;
            
            watermark.SetSettings(settings);
            watermark.InsertToAllPages();
            
            doc.SaveAs("output.pdf", PDFDoc.SaveFlags.e_SaveFlagNoOriginal);
        }
        
        Library.Release();
    }
}

// NuGet: Install-Package Foxit.SDK
using Foxit.SDK;
using Foxit.SDK.Common;
using Foxit.SDK.PDFDoc;
using System;

class Program
{
    static void Main()
    {
        Library.Initialize("sn", "key");
        
        using (PDFDoc doc = new PDFDoc("input.pdf"))
        {
            doc.Load("");
            
            Watermark watermark = new Watermark(doc, "Confidential", 
                new Font(Font.StandardID.e_StdIDHelvetica), 48.0f, 0xFF0000FF);
            
            WatermarkSettings settings = new WatermarkSettings();
            settings.flags = Watermark.e_WatermarkFlagASPageContents;
            settings.position = Watermark.Position.e_PosCenter;
            settings.rotation = -45.0f;
            settings.opacity = 0.5f;
            
            watermark.SetSettings(settings);
            watermark.InsertToAllPages();
            
            doc.SaveAs("output.pdf", PDFDoc.SaveFlags.e_SaveFlagNoOriginal);
        }
        
        Library.Release();
    }
}

' NuGet: Install-Package Foxit.SDK
Imports Foxit.SDK
Imports Foxit.SDK.Common
Imports Foxit.SDK.PDFDoc
Imports System

Class Program
    Shared Sub Main()
        Library.Initialize("sn", "key")
        
        Using doc As New PDFDoc("input.pdf")
            doc.Load("")
            
            Dim watermark As New Watermark(doc, "Confidential", 
                                            New Font(Font.StandardID.e_StdIDHelvetica), 48.0F, &HFF0000FF)
            
            Dim settings As New WatermarkSettings()
            settings.flags = Watermark.e_WatermarkFlagASPageContents
            settings.position = Watermark.Position.e_PosCenter
            settings.rotation = -45.0F
            settings.opacity = 0.5F
            
            watermark.SetSettings(settings)
            watermark.InsertToAllPages()
            
            doc.SaveAs("output.pdf", PDFDoc.SaveFlags.e_SaveFlagNoOriginal)
        End Using
        
        Library.Release()
    End Sub
End Class

' NuGet: Install-Package Foxit.SDK
Imports Foxit.SDK
Imports Foxit.SDK.Common
Imports Foxit.SDK.PDFDoc
Imports System

Class Program
    Shared Sub Main()
        Library.Initialize("sn", "key")
        
        Using doc As New PDFDoc("input.pdf")
            doc.Load("")
            
            Dim watermark As New Watermark(doc, "Confidential", 
                                            New Font(Font.StandardID.e_StdIDHelvetica), 48.0F, &HFF0000FF)
            
            Dim settings As New WatermarkSettings()
            settings.flags = Watermark.e_WatermarkFlagASPageContents
            settings.position = Watermark.Position.e_PosCenter
            settings.rotation = -45.0F
            settings.opacity = 0.5F
            
            watermark.SetSettings(settings)
            watermark.InsertToAllPages()
            
            doc.SaveAs("output.pdf", PDFDoc.SaveFlags.e_SaveFlagNoOriginal)
        End Using
        
        Library.Release()
    End Sub
End Class

IronPDF：

// NuGet: Install-Package IronPdf
using IronPdf;
using IronPdf.Editing;
using System;

class Program
{
    static void Main()
    {
        var pdf = PdfDocument.FromFile("input.pdf");
        pdf.ApplyWatermark(new TextStamper()
        {
            Text = "Confidential",
            FontSize = 48,
            Opacity = 50,
            Rotation = -45,
            VerticalAlignment = VerticalAlignment.Middle,
            HorizontalAlignment = HorizontalAlignment.Center
        });
        pdf.SaveAs("output.pdf");
    }
}

// NuGet: Install-Package IronPdf
using IronPdf;
using IronPdf.Editing;
using System;

class Program
{
    static void Main()
    {
        var pdf = PdfDocument.FromFile("input.pdf");
        pdf.ApplyWatermark(new TextStamper()
        {
            Text = "Confidential",
            FontSize = 48,
            Opacity = 50,
            Rotation = -45,
            VerticalAlignment = VerticalAlignment.Middle,
            HorizontalAlignment = HorizontalAlignment.Center
        });
        pdf.SaveAs("output.pdf");
    }
}

Imports IronPdf
Imports IronPdf.Editing
Imports System

Class Program
    Shared Sub Main()
        Dim pdf = PdfDocument.FromFile("input.pdf")
        pdf.ApplyWatermark(New TextStamper() With {
            .Text = "Confidential",
            .FontSize = 48,
            .Opacity = 50,
            .Rotation = -45,
            .VerticalAlignment = VerticalAlignment.Middle,
            .HorizontalAlignment = HorizontalAlignment.Center
        })
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Imports IronPdf
Imports IronPdf.Editing
Imports System

Class Program
    Shared Sub Main()
        Dim pdf = PdfDocument.FromFile("input.pdf")
        pdf.ApplyWatermark(New TextStamper() With {
            .Text = "Confidential",
            .FontSize = 48,
            .Opacity = 50,
            .Rotation = -45,
            .VerticalAlignment = VerticalAlignment.Middle,
            .HorizontalAlignment = HorizontalAlignment.Center
        })
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Foxit SDK要求： 1.用憑證Library.Initialize() 2. 建立doc.Load("") 3. 建立一個Font.StandardID.e_StdIDHelvetica）、大小和顏色 4. 建立opacity 5. 呼叫watermark.InsertToAllPages() 6. 使用PDFDoc.SaveFlags.e_SaveFlagNoOriginal 7. 使用Library.Release()進行清理

IronPDF使用HorizontalAlignment。枚舉值（Watermark.Position.e_PosCenter語法具有自解釋性。

API映射參考

對於評估Foxit SDK遷移或比較能力的開發人員，這張對應圖展示了等效操作：

核心類映射

Foxit SDK	IronPDF
`Library.Initialize(sn, key)`	`IronPdf.License.LicenseKey = "key"`
`Library.Release()`	不適用
`PDFDoc`	`PdfDocument`
`PDFDoc.Load("")`	自動
`doc.SaveAs(path, flags)`	`pdf.SaveAs(path)`
`doc.Close()`	`pdf.Dispose()`或使用
`HTML2PDF`	`ChromePdfRenderer`
`HTML2PDFSettingData`	`RenderingOptions`
`html2pdf.Convert(html, path)`	`renderer.RenderHtmlAsPdf(html)`
`html2pdf.ConvertFromURL(url, path)`	`renderer.RenderUrlAsPdf(url)`
[`Watermark` + `WatermarkSettings`]	`TextStamper`
`Font(Font.StandardID.e_StdIDHelvetica)`	戳記上的屬性

配置映射

Foxit SDK	IronPDF
`settingData.page_width = 612.0f`	`RenderingOptions.PaperSize`
`settingData.page_height = 792.0f`	`RenderingOptions.SetCustomPaperSize()`
`settingData.page_mode`	預設為多頁
點（72每英寸）	毫米

浮水印設置對應

Foxit SDK	IronPDF
`Watermark.Position.e_PosCenter`	`VerticalAlignment.Middle` + `HorizontalAlignment.Center`
`settings.rotation = -45.0f`	`Rotation = -45`
`settings.opacity = 0.5f`	`Opacity = 50`
`settings.flags`	不適用
`watermark.InsertToAllPages()`	自動

功能比較總結

功能	Foxit SDK	IronPDF
HTML到PDF	是（單獨加購）	是（內建）
URL到PDF	是	是
浮水印	是	是
簡單的NuGet安裝	是（大型包）	是
需要初始化	是（`Library.Initialize`）	否（僅設置一次金鑰）
需要清理	是（`Library.Release`）	否（自動）
ErrorCode處理	是	否（使用例外）
IDisposable模式	部分支持	是
點數單位系統	是	否（使用毫米）