C# PDF程式庫

HTML 轉 PDF

using IronPdf;

// Disable local disk access or cross-origin requests
Installation.EnableWebSecurity = true;

// Instantiate Renderer
var renderer = new ChromePdfRenderer();

// Create a PDF from a HTML string using C#
var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");

// Export to a file or Stream
pdf.SaveAs("output.pdf");

// Advanced Example with HTML Assets
// Load external html assets: Images, CSS and JavaScript.
// An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
myAdvancedPdf.SaveAs("html-with-assets.pdf");

using IronPdf;

// Disable local disk access or cross-origin requests
Installation.EnableWebSecurity = true;

// Instantiate Renderer
var renderer = new ChromePdfRenderer();

// Create a PDF from a HTML string using C#
var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");

// Export to a file or Stream
pdf.SaveAs("output.pdf");

// Advanced Example with HTML Assets
// Load external html assets: Images, CSS and JavaScript.
// An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
myAdvancedPdf.SaveAs("html-with-assets.pdf");

PM >Install-Package IronPdf

Install-Package IronPdf

影片

如何在 C# 中壓縮 PDF

Curtis Chau

Updated: 2026年7月19日

從Ghostscript遷移到IronPDF，將您的.NET PDF工作流程從命令行過程生成和基於字串的開關操作轉移到具型別化、IntelliSense支援的本地.NET API上。本指南逐步引導您完成遷移過程，消除AGPL-3.0授權風險和外部本地二進制依賴。

術語說明：Ghostscript（由Artifex Software開發）是雙授權的，根據AGPL-3.0或商業授權，而非純GPL。 "GPL"標籤是社區長期使用的開源版本簡稱；本指南中的所有內容均指Ghostscript的AGPL-3.0版本和Ghostscript.NET包裝器（同樣是AGPL-3.0 / 商業雙重授權）。從.NET，通常透過該包裝器與Ghostscript交互，它通過P/Invoke調用本地的gsdll32.dll / gswin32c / gswin64c。

為何從Ghostscript遷移到IronPDF

Ghostscript面臨的挑戰

Ghostscript是Artifex Software開發的歷史悠久的PostScript/PDF解釋器。在現代.NET應用程式中運用其會面臨若干實際挑戰：

**AGPL-3.0授權限制：**Ghostscript本身及Ghostscript.NET包裝器均由Artifex提供的AGPL-3.0或商業授權雙重授權。 AGPL的網路共享條款通常要求您公開較大工作源程式碼的對應部分，包括SaaS/網路使用，除非您購買了商業授權。這往往排除了封閉源碼或託管.NET應用程式中使用AGPL版本的可能性。
**命令行介面：**Ghostscript本質上是一個命令行工具。從C#使用它意味著生成進程、傳遞字串參數及解析輸出 — 要麼通過對Ghostscript.NET的P/Invoke包裝器。
**外部二進制依賴：**您必須分別安裝Ghostscript、管理PATH變數並保持版本跨環境一致。 32位與64位需要不同的本地DLL（gsdll64.dll）。
**無本地HTML到PDF：**Ghostscript無法直接將HTML轉換為PDF。您需要先使用其他工具將HTML轉換為PostScript，然後運行Ghostscript將PostScript轉換為PDF — 這是一個多步驟管道，且有外部依賴。
**複雜的開關語法：**操作是通過如-dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=...那樣的命令行開關控制的。沒有IntelliSense，沒有編譯時檢查。
**錯誤處理：**錯誤通過stderr以文字字串形式出現，需要解析而非結構化異常處理。
**進程管理負擔：**每次操作都會生成單獨的進程，增加了超時和資源清理的負擔和複雜性。

Ghostscript與IronPDF比較

方面	Ghostscript	IronPDF
授權	AGPL-3.0（網路共享）或Artifex商業	商業授權明確
整合	命令行進程生成	原生.NET程式庫
API設計	基於字串的開關	型別化且支援IntelliSense的API
錯誤處理	解析stderr文字	.NET異常
HTML到PDF	不支援（需要外部工具）	內建 Chromium 引擎
依賴關係	外部二進制安裝	自包含NuGet包
部署	配置PATH，複製DLL	僅需新增NuGet引用
執行緒安全	僅進程隔離	設計上具現成的執行緒安全性
現代.NET	`Ghostscript.NET` v1.3.x目標.NET Standard 2.0	.NET Framework 4.6.2+ and .NET 6/7/8/9
異步支援	基於進程	原生async/await

遷移複雜性評估

功能的預估努力程度

功能	遷移複雜性
PDF轉圖像	低
合併PDF	低
壓縮PDF	低
PDF優化	低
加密	中
頁面提取	低
PostScript轉PDF	中-高
自定義開關	中-高

範式轉變

此Ghostscript遷移的根本轉變是從命令行過程執行轉向型別化.NET API調用：

Ghostscript："將這些字串開關傳遞給外部進程"
IronPDF："在.NET對象上調用這些方法"

Ghostscript："將這些字串開關傳遞給外部進程"
IronPDF："在.NET對象上調用這些方法"

Text

開始之前

前提條件

**.NET版本：**IronPDF支援.NET Framework 4.6.2+和.NET Core/.NET 5+（包括.NET 6/7/8/9）。 Ghostscript.NET v1.3.x目標.NET Standard 2.0。
**授權金鑰：**從ironpdf.com取得您的IronPDF授權金鑰
**備份：**建立一個遷移工作的分支

識別所有Ghostscript使用

# Find all Ghostscript.NET references
grep -r "Ghostscript\.NET\|GhostscriptProcessor\|GhostscriptRasterizer\|gsdll" --include="*.cs" .

# Find direct process calls to Ghostscript
grep -r "gswin64c\|gswin32c\|gs\|ProcessStartInfo.*ghost" --include="*.cs" .

# Find package references
grep -r "Ghostscript" --include="*.csproj" .

# Find all Ghostscript.NET references
grep -r "Ghostscript\.NET\|GhostscriptProcessor\|GhostscriptRasterizer\|gsdll" --include="*.cs" .

# Find direct process calls to Ghostscript
grep -r "gswin64c\|gswin32c\|gs\|ProcessStartInfo.*ghost" --include="*.cs" .

# Find package references
grep -r "Ghostscript" --include="*.csproj" .

SHELL

NuGet包變更

# Remove Ghostscript.NET
dotnet remove package Ghostscript.NET

# Install IronPDF
dotnet add package IronPdf

# Remove Ghostscript.NET
dotnet remove package Ghostscript.NET

# Install IronPDF
dotnet add package IronPdf

SHELL

移除Ghostscript依賴

遷移后：

從伺服器中解除安裝Ghostscript
從部署中移除gsdll32.dll / gsdll64.dll
移除Ghostscript的PATH配置
移除任何GhostscriptVersionInfo引用

快速開始遷移

步驟1：更新授權配置

之前（Ghostscript）：

Ghostscript在AGPL-3.0下需要依據AGPL條款公開源程式碼或獲得Artifex的商業授權。

之後（IronPDF）：

// Set once at application startup
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

// Set once at application startup
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

net

net

步驟2：更新名稱空間的引入

// Before (Ghostscript)
using Ghostscript.NET;
using Ghostscript.NET.Processor;
using Ghostscript.NET.Rasterizer;

// After (IronPDF)
using IronPdf;

// Before (Ghostscript)
using Ghostscript.NET;
using Ghostscript.NET.Processor;
using Ghostscript.NET.Rasterizer;

// After (IronPDF)
using IronPdf;

Imports Ghostscript.NET
Imports Ghostscript.NET.Processor
Imports Ghostscript.NET.Rasterizer

' After (IronPDF)
Imports IronPdf

Imports Ghostscript.NET
Imports Ghostscript.NET.Processor
Imports Ghostscript.NET.Rasterizer

' After (IronPDF)
Imports IronPdf

完整API參考

核心類映射

Ghostscript.NET	IronPDF	說明
`GhostscriptProcessor`	各種`PdfDocument`方法	PDF處理
`GhostscriptRasterizer`	`PdfDocument.RasterizeToImageFiles()`	PDF到圖像
`GhostscriptVersionInfo`	不適用（不需要）	DLL位置
`GhostscriptStdIO`	不適用（使用異常）	I/O處理
進程 + 命令行	`ChromePdfRenderer`	HTML to PDF

命令行開關對映

Ghostscript開關	IronPDF等價	說明
`-dNOPAUSE`	不適用（不需要）	不在頁面之間暫停
`-dBATCH`	不適用（不需要）	處理後退出
`-dSAFER`	不適用（預設）	安全的文件存取
`-sDEVICE=pdfwrite`	各種PDF方法	輸出PDF
`-sDEVICE=png16m`	`RasterizeToImageFiles("*.png", DPI: N)`	PNG輸出
`-sOutputFile=X`	`SaveAs("X")`	輸出檔案名
`-r300`	`DPI: 300`參數	解析度
`-dPDFSETTINGS=/ebook`	`CompressImages(quality: 60)`	中等品質
`-dFirstPage=N -dLastPage=M`	`CopyPages(new[] {N-1, ..., M-1})`	頁面提取（0索引）
`-sOwnerPassword=X`	`SecuritySettings.OwnerPassword`	擁有者密碼
`-sUserPassword=X`	`SecuritySettings.UserPassword`	使用者密碼

程式碼遷移範例

範例1：HTML轉PDF轉換

之前（Ghostscript）：

// NuGet: Install-Package Ghostscript.NET
using Ghostscript.NET;
using Ghostscript.NET.Processor;
using System.IO;
using System.Text;

class GhostscriptExample
{
    static void Main()
    {
        // Ghostscript cannot directly convert HTML to PDF
        // You need to first convert HTML to PS/EPS using another tool
        // then use Ghostscript to convert PS to PDF
        
        string htmlContent = "<html><body><h1>Hello World</h1></body></html>";
        string psFile = "temp.ps";
        string outputPdf = "output.pdf";
        
        // This is a workaround - Ghostscript primarily works with PostScript
        GhostscriptProcessor processor = new GhostscriptProcessor();
        
        List<string> switches = new List<string>
        {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}",
            psFile
        };
        
        processor.Process(switches.ToArray());
    }
}

// NuGet: Install-Package Ghostscript.NET
using Ghostscript.NET;
using Ghostscript.NET.Processor;
using System.IO;
using System.Text;

class GhostscriptExample
{
    static void Main()
    {
        // Ghostscript cannot directly convert HTML to PDF
        // You need to first convert HTML to PS/EPS using another tool
        // then use Ghostscript to convert PS to PDF
        
        string htmlContent = "<html><body><h1>Hello World</h1></body></html>";
        string psFile = "temp.ps";
        string outputPdf = "output.pdf";
        
        // This is a workaround - Ghostscript primarily works with PostScript
        GhostscriptProcessor processor = new GhostscriptProcessor();
        
        List<string> switches = new List<string>
        {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}",
            psFile
        };
        
        processor.Process(switches.ToArray());
    }
}

' NuGet: Install-Package Ghostscript.NET
Imports Ghostscript.NET
Imports Ghostscript.NET.Processor
Imports System.IO
Imports System.Text

Class GhostscriptExample
    Shared Sub Main()
        ' Ghostscript cannot directly convert HTML to PDF
        ' You need to first convert HTML to PS/EPS using another tool
        ' then use Ghostscript to convert PS to PDF

        Dim htmlContent As String = "<html><body><h1>Hello World</h1></body></html>"
        Dim psFile As String = "temp.ps"
        Dim outputPdf As String = "output.pdf"

        ' This is a workaround - Ghostscript primarily works with PostScript
        Dim processor As New GhostscriptProcessor()

        Dim switches As New List(Of String) From {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}",
            psFile
        }

        processor.Process(switches.ToArray())
    End Sub
End Class

' NuGet: Install-Package Ghostscript.NET
Imports Ghostscript.NET
Imports Ghostscript.NET.Processor
Imports System.IO
Imports System.Text

Class GhostscriptExample
    Shared Sub Main()
        ' Ghostscript cannot directly convert HTML to PDF
        ' You need to first convert HTML to PS/EPS using another tool
        ' then use Ghostscript to convert PS to PDF

        Dim htmlContent As String = "<html><body><h1>Hello World</h1></body></html>"
        Dim psFile As String = "temp.ps"
        Dim outputPdf As String = "output.pdf"

        ' This is a workaround - Ghostscript primarily works with PostScript
        Dim processor As New GhostscriptProcessor()

        Dim switches As New List(Of String) From {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}",
            psFile
        }

        processor.Process(switches.ToArray())
    End Sub
End Class

之後（IronPDF）：

// NuGet: Install-Package IronPdf
using IronPdf;

class IronPdfExample
{
    static void Main()
    {
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

        var renderer = new ChromePdfRenderer();

        string htmlContent = "<html><body><h1>Hello World</h1></body></html>";

        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        pdf.SaveAs("output.pdf");
    }
}

// NuGet: Install-Package IronPdf
using IronPdf;

class IronPdfExample
{
    static void Main()
    {
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

        var renderer = new ChromePdfRenderer();

        string htmlContent = "<html><body><h1>Hello World</h1></body></html>";

        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        pdf.SaveAs("output.pdf");
    }
}

Imports IronPdf

Class IronPdfExample
    Shared Sub Main()
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

        Dim renderer As New ChromePdfRenderer()

        Dim htmlContent As String = "<html><body><h1>Hello World</h1></body></html>"

        Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Imports IronPdf

Class IronPdfExample
    Shared Sub Main()
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

        Dim renderer As New ChromePdfRenderer()

        Dim htmlContent As String = "<html><body><h1>Hello World</h1></body></html>"

        Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)
        pdf.SaveAs("output.pdf")
    End Sub
End Class

Ghostscript無法直接將HTML轉換為PDF — 它期望PostScript或PDF輸入，所以HTML工作流需要中間轉換（通常通過wkhtmltopdf或類似工具）。 IronPDF的ChromePdfRenderer提供直接的HTML到PDF渲染，支援CSS、JavaScript和現代網路標準，並使用內嵌的Chromium引擎。請參閱HTML到PDF文件了解更多渲染選項。

範例2：PDF到圖像

之前（Ghostscript）：

// NuGet: Install-Package Ghostscript.NET
using Ghostscript.NET;
using Ghostscript.NET.Rasterizer;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

class GhostscriptExample
{
    static void Main()
    {
        string inputPdf = "input.pdf";
        string outputPath = "output";
        
        GhostscriptVersionInfo gvi = new GhostscriptVersionInfo("gsdll64.dll");
        
        using (GhostscriptRasterizer rasterizer = new GhostscriptRasterizer())
        {
            rasterizer.Open(inputPdf, gvi, false);
            
            for (int pageNumber = 1; pageNumber <= rasterizer.PageCount; pageNumber++)
            {
                Image img = rasterizer.GetPage(300, pageNumber);
                img.Save($"{outputPath}_page{pageNumber}.png", ImageFormat.Png);
                img.Dispose();
            }
        }
    }
}

// NuGet: Install-Package Ghostscript.NET
using Ghostscript.NET;
using Ghostscript.NET.Rasterizer;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

class GhostscriptExample
{
    static void Main()
    {
        string inputPdf = "input.pdf";
        string outputPath = "output";
        
        GhostscriptVersionInfo gvi = new GhostscriptVersionInfo("gsdll64.dll");
        
        using (GhostscriptRasterizer rasterizer = new GhostscriptRasterizer())
        {
            rasterizer.Open(inputPdf, gvi, false);
            
            for (int pageNumber = 1; pageNumber <= rasterizer.PageCount; pageNumber++)
            {
                Image img = rasterizer.GetPage(300, pageNumber);
                img.Save($"{outputPath}_page{pageNumber}.png", ImageFormat.Png);
                img.Dispose();
            }
        }
    }
}

' NuGet: Install-Package Ghostscript.NET
Imports Ghostscript.NET
Imports Ghostscript.NET.Rasterizer
Imports System.Drawing
Imports System.Drawing.Imaging
Imports System.IO

Class GhostscriptExample
    Shared Sub Main()
        Dim inputPdf As String = "input.pdf"
        Dim outputPath As String = "output"
        
        Dim gvi As New GhostscriptVersionInfo("gsdll64.dll")
        
        Using rasterizer As New GhostscriptRasterizer()
            rasterizer.Open(inputPdf, gvi, False)
            
            For pageNumber As Integer = 1 To rasterizer.PageCount
                Dim img As Image = rasterizer.GetPage(300, pageNumber)
                img.Save($"{outputPath}_page{pageNumber}.png", ImageFormat.Png)
                img.Dispose()
            Next
        End Using
    End Sub
End Class

' NuGet: Install-Package Ghostscript.NET
Imports Ghostscript.NET
Imports Ghostscript.NET.Rasterizer
Imports System.Drawing
Imports System.Drawing.Imaging
Imports System.IO

Class GhostscriptExample
    Shared Sub Main()
        Dim inputPdf As String = "input.pdf"
        Dim outputPath As String = "output"
        
        Dim gvi As New GhostscriptVersionInfo("gsdll64.dll")
        
        Using rasterizer As New GhostscriptRasterizer()
            rasterizer.Open(inputPdf, gvi, False)
            
            For pageNumber As Integer = 1 To rasterizer.PageCount
                Dim img As Image = rasterizer.GetPage(300, pageNumber)
                img.Save($"{outputPath}_page{pageNumber}.png", ImageFormat.Png)
                img.Dispose()
            Next
        End Using
    End Sub
End Class

之後（IronPDF）：

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

class IronPdfExample
{
    static void Main()
    {
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

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

        // One-shot: write every page as PNG matching Ghostscript's -r300 -sDEVICE=png16m
        pdf.RasterizeToImageFiles("output_page*.png", DPI: 300);
    }
}

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

class IronPdfExample
{
    static void Main()
    {
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

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

        // One-shot: write every page as PNG matching Ghostscript's -r300 -sDEVICE=png16m
        pdf.RasterizeToImageFiles("output_page*.png", DPI: 300);
    }
}

Imports IronPdf
Imports System

Class IronPdfExample
    Shared Sub Main()
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

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

        ' One-shot: write every page as PNG matching Ghostscript's -r300 -sDEVICE=png16m
        pdf.RasterizeToImageFiles("output_page*.png", DPI:=300)
    End Sub
End Class

Imports IronPdf
Imports System

Class IronPdfExample
    Shared Sub Main()
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

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

        ' One-shot: write every page as PNG matching Ghostscript's -r300 -sDEVICE=png16m
        pdf.RasterizeToImageFiles("output_page*.png", DPI:=300)
    End Sub
End Class

Ghostscript方法要求定位外部GhostscriptVersionInfo物件並使用1索引的頁碼迭代頁面。 IronPDF的DPI:參數，無需外部本地依賴。注意，當您處理頁索引時，Ghostscript使用1索引頁碼，而IronPDF使用0索引頁碼（標準.NET慣例）。

範例3：合併PDF檔案

之前（Ghostscript）：

// NuGet: Install-Package Ghostscript.NET
using Ghostscript.NET;
using Ghostscript.NET.Processor;
using System.Collections.Generic;

class GhostscriptExample
{
    static void Main()
    {
        string outputPdf = "merged.pdf";
        string[] inputFiles = { "file1.pdf", "file2.pdf", "file3.pdf" };
        
        GhostscriptProcessor processor = new GhostscriptProcessor();
        
        List<string> switches = new List<string>
        {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}"
        };
        
        switches.AddRange(inputFiles);
        
        processor.Process(switches.ToArray());
    }
}

// NuGet: Install-Package Ghostscript.NET
using Ghostscript.NET;
using Ghostscript.NET.Processor;
using System.Collections.Generic;

class GhostscriptExample
{
    static void Main()
    {
        string outputPdf = "merged.pdf";
        string[] inputFiles = { "file1.pdf", "file2.pdf", "file3.pdf" };
        
        GhostscriptProcessor processor = new GhostscriptProcessor();
        
        List<string> switches = new List<string>
        {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}"
        };
        
        switches.AddRange(inputFiles);
        
        processor.Process(switches.ToArray());
    }
}

' NuGet: Install-Package Ghostscript.NET
Imports Ghostscript.NET
Imports Ghostscript.NET.Processor
Imports System.Collections.Generic

Class GhostscriptExample
    Shared Sub Main()
        Dim outputPdf As String = "merged.pdf"
        Dim inputFiles As String() = {"file1.pdf", "file2.pdf", "file3.pdf"}

        Dim processor As New GhostscriptProcessor()

        Dim switches As New List(Of String) From {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}"
        }

        switches.AddRange(inputFiles)

        processor.Process(switches.ToArray())
    End Sub
End Class

' NuGet: Install-Package Ghostscript.NET
Imports Ghostscript.NET
Imports Ghostscript.NET.Processor
Imports System.Collections.Generic

Class GhostscriptExample
    Shared Sub Main()
        Dim outputPdf As String = "merged.pdf"
        Dim inputFiles As String() = {"file1.pdf", "file2.pdf", "file3.pdf"}

        Dim processor As New GhostscriptProcessor()

        Dim switches As New List(Of String) From {
            "-dNOPAUSE",
            "-dBATCH",
            "-dSAFER",
            "-sDEVICE=pdfwrite",
            $"-sOutputFile={outputPdf}"
        }

        switches.AddRange(inputFiles)

        processor.Process(switches.ToArray())
    End Sub
End Class

之後（IronPDF）：

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

class IronPdfExample
{
    static void Main()
    {
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

        var pdfs = new List<PdfDocument>
        {
            PdfDocument.FromFile("file1.pdf"),
            PdfDocument.FromFile("file2.pdf"),
            PdfDocument.FromFile("file3.pdf")
        };

        var merged = PdfDocument.Merge(pdfs);
        merged.SaveAs("merged.pdf");
    }
}

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

class IronPdfExample
{
    static void Main()
    {
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

        var pdfs = new List<PdfDocument>
        {
            PdfDocument.FromFile("file1.pdf"),
            PdfDocument.FromFile("file2.pdf"),
            PdfDocument.FromFile("file3.pdf")
        };

        var merged = PdfDocument.Merge(pdfs);
        merged.SaveAs("merged.pdf");
    }
}

Imports IronPdf
Imports System.Collections.Generic

Class IronPdfExample
    Shared Sub Main()
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

        Dim pdfs = New List(Of PdfDocument) From {
            PdfDocument.FromFile("file1.pdf"),
            PdfDocument.FromFile("file2.pdf"),
            PdfDocument.FromFile("file3.pdf")
        }

        Dim merged = PdfDocument.Merge(pdfs)
        merged.SaveAs("merged.pdf")
    End Sub
End Class

Imports IronPdf
Imports System.Collections.Generic

Class IronPdfExample
    Shared Sub Main()
        IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

        Dim pdfs = New List(Of PdfDocument) From {
            PdfDocument.FromFile("file1.pdf"),
            PdfDocument.FromFile("file2.pdf"),
            PdfDocument.FromFile("file3.pdf")
        }

        Dim merged = PdfDocument.Merge(pdfs)
        merged.SaveAs("merged.pdf")
    End Sub
End Class

Ghostscript方法需要完整的開關咒語（-dNOPAUSE, -dBATCH, -sDEVICE=pdfwrite）和將文件路徑串聯成字串陣列。 IronPDF的靜態PdfDocument。了解更多合併和拆分PDF的資訊。

關鍵遷移注意事項

頁面索引轉換

這次遷移中最重要的區別之一是頁面索引。 Ghostscript的-dFirstPage=N / -dLastPage=M開關是1索引。 IronPDF的CopyPages是0索引（標準.NET）：

// Ghostscript: -dFirstPage=5 -dLastPage=8 (1-indexed, inclusive)

// IronPDF: 0-indexed page array
var extracted = pdf.CopyPages(new[] {4, 5, 6, 7});
extracted.SaveAs("pages_5_to_8.pdf");

// Ghostscript: -dFirstPage=5 -dLastPage=8 (1-indexed, inclusive)

// IronPDF: 0-indexed page array
var extracted = pdf.CopyPages(new[] {4, 5, 6, 7});
extracted.SaveAs("pages_5_to_8.pdf");

' Ghostscript: -dFirstPage=5 -dLastPage=8 (1-indexed, inclusive)

' IronPDF: 0-indexed page array
Dim extracted = pdf.CopyPages({4, 5, 6, 7})
extracted.SaveAs("pages_5_to_8.pdf")

' Ghostscript: -dFirstPage=5 -dLastPage=8 (1-indexed, inclusive)

' IronPDF: 0-indexed page array
Dim extracted = pdf.CopyPages({4, 5, 6, 7})
extracted.SaveAs("pages_5_to_8.pdf")

AGPL-3.0授權問題

Ghostscript和Ghostscript.NET包裝器均由Artifex提供的AGPL-3.0或商業授權雙重授權。 AGPL-3.0的網路共享條款通常要求公開較大工作源程式碼的對應部分，包括SaaS/網路可存取的部署，除非您持有Artifex的商業授權。將PDF工作負載遷移到IronPDF之後，移動的部分將不再有此義務; 如果您僅保持Ghostscript以便處理PostScript，那麼Artifex的商業授權涵蓋該部分。 (This is a general summary, not legal advice — consult counsel for your specific deployment.)

沒有外部二進位文件

IronPDF發布為NuGet包。遷移后移除這些：

gsdll64.dll文件
從伺服器解除安裝Ghostscript
PATH環境變數配置
程式碼中的GhostscriptVersionInfo引用

PostScript文件

IronPDF不直接處理PostScript（.ps）文件。如果您的工作流需要PostScript處理，則可選擇：

在IronPDF處理之前使用其他工具將PostScript轉換為PDF
將源內容轉換為HTML並使用IronPDF的HTML渲染

效能考量

無進程生成

調用gswin64c.exe（或P/Invoking gsdll64.dll）會導致每次操作都有進程和本地互操作的負擔。 IronPDF作為受管的.NET程式碼在進程中運行：

// Ghostscript: process or P/Invoke overhead per call
processor.Process(switches.ToArray());

// IronPDF: in-process method call
var merged = PdfDocument.Merge(pdfs);

// Ghostscript: process or P/Invoke overhead per call
processor.Process(switches.ToArray());

// IronPDF: in-process method call
var merged = PdfDocument.Merge(pdfs);

' Ghostscript: process or P/Invoke overhead per call
processor.Process(switches.ToArray())

' IronPDF: in-process method call
Dim merged = PdfDocument.Merge(pdfs)

' Ghostscript: process or P/Invoke overhead per call
processor.Process(switches.ToArray())

' IronPDF: in-process method call
Dim merged = PdfDocument.Merge(pdfs)