C# PDF库

HTML到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

视频

如何在 C# | IronPDF 中添加目录

Curtis Chau

Updated: 2026年7月19日

wkhtmltopdf是一个被广泛使用的工具，用于将HTML文档转换为PDF，使用的是Qt 4.8 + QtWebKit。尽管该项目因其命令行功能和免费许可而深受开发人员的欢迎，但它现在存在的严重安全风险已不容忽视。 GitHub存储库已于2023年1月2日归档；最后的上游版本是2020年6月11日的0.12.6；并且CVE-2022-35583（CVSS 9.8，SSRF）仍未修补。

本指南提供了从 wkhtmltopdf 到IronPDF的完整迁移路径，为需要从应用程序中消除这种安全风险的专业 .NET 开发人员提供了分步指导、代码比较和实用示例。

关键安全警告：CVE-2022-35583

wkhtmltopdf 包含一个永远无法修复的重要安全漏洞：

问题	详细信息	现状
CVE-2022-35583（SSRF，CWE-918）	关键（CVSS 9.8）	未修补 - 维护者提出异议
GitHub存储库已归档	只读	2023年1月2日
最后的上游版本	0.12.6	2020年6月11日
底层引擎	Qt 4.8 + QtWebKit（Qt 4.8 于2015年终止支持）	已关闭
CSS 网格支持	None	破译
Flexbox 支持	部分翻译	破译
ES6+JavaScript>	有限的	破译

SSRF 攻击如何工作

服务器端请求伪造漏洞允许攻击者访问内部服务、窃取凭证、扫描您的内部网络并通过伪造的 HTML 外泄敏感数据：

<!-- Malicious HTML submitted to your PDF generator -->
<iframe src="http://169.254.169.254/latest/meta-data/iam/security-credentials/"></iframe>
<img src="http://internal-database:5432/admin"/>

<!-- Malicious HTML submitted to your PDF generator -->
<iframe src="http://169.254.169.254/latest/meta-data/iam/security-credentials/"></iframe>
<img src="http://internal-database:5432/admin"/>

HTML

当 wkhtmltopdf 渲染 HTML 时，它会绕过防火墙和安全控制，从服务器的网络上下文中获取这些 URL。

受影响的封装库

每个.NET包装器都绑定或外壳使用相同的wkhtmltopdf本地二进制，所以它们无论包装器本身多活跃，都会继承其CVE漏洞：

封装库	最新的NuGet	安全风险
DinkToPdf	1.0.8（2017年4月） - 被遗弃	继承CVE-2022-35583
Rotativa.AspNetCore（webgio的分支）	1.4.0（2023年11月） - 包装器更新，二进制冻结	继承CVE-2022-35583
TuesPechkin	2.1.1（2015年1月） - 被遗弃	继承CVE-2022-35583
Haukcode.WkHtmlToPdfDotNet (formerly `WkHtmlToPdf-DotNet`)	1.5.95（2024年10月） - 包装器更新，二进制冻结	继承CVE-2022-35583
NReco.PdfGenerator	包装器更新，绑定wkhtmltopdf	继承CVE-2022-35583

如果您使用这些库中的任何一个，除非您清洗所有HTML输入，否则您的应用程序会暴露于CVE-2022-35583。

##IronPDF与 wkhtmltopdf：功能对比

了解架构差异有助于技术决策者评估迁移投资：

特征	wkhtmltopdf	IronPDF
许可	LGPLv3 （免费）	商业翻译
渲染引擎	Qt 4.8 + QtWebKit（Qt 4.8 于2015年终止支持）	当前Chromium引擎
安全漏洞	CVE-2022-35583（CVSS 9.8）未修补，存有争议	未报告严重的CVE
主动维护	GitHub存储库已于2023年1月2日归档；最后的版本于2020年6月	定期发布，积极维护
支持现代网络标准	有限（flexbox 已损坏，无 CSS 网格）	支持
集成与支持	仅限于社区论坛	广泛的文档和专门的支持
CSS 网格	❌ 不支持	✅ 已支持
Flexbox	⚠ 损坏	✅ 已支持
ES6+JavaScript>	❌ 不支持	✅ 已支持
同步/等待	❌ 不支持	✅ 已支持
PDF 操作	❌ 不支持	✅ 已支持
数字签名	❌ 不支持	✅ 已支持
PDF/A合规性	❌ 不支持	✅ 已支持

快速入门：wkhtmltopdf 到IronPDF的迁移

迁移工作可以通过以下基本步骤立即开始。

步骤 1：删除 wkhtmltopdf 软件包和二进制文件

删除所有 wkhtmltopdf 封装包：

# Remove wkhtmltopdf wrapper (whichever you're using)
dotnet remove package Haukcode.WkHtmlToPdfDotNet
dotnet remove package DinkToPdf
dotnet remove package TuesPechkin
dotnet remove package Rotativa
dotnet remove package Rotativa.AspNetCore
dotnet remove package NReco.PdfGenerator

# Remove wkhtmltopdf binary from your deployment
# Delete wkhtmltopdf.exe, wkhtmltox.dll, etc.

# Remove wkhtmltopdf wrapper (whichever you're using)
dotnet remove package Haukcode.WkHtmlToPdfDotNet
dotnet remove package DinkToPdf
dotnet remove package TuesPechkin
dotnet remove package Rotativa
dotnet remove package Rotativa.AspNetCore
dotnet remove package NReco.PdfGenerator

# Remove wkhtmltopdf binary from your deployment
# Delete wkhtmltopdf.exe, wkhtmltox.dll, etc.

SHELL

步骤2：安装IronPDF

# AddIronPDF(secure, modern alternative)
dotnet add package IronPdf

# AddIronPDF(secure, modern alternative)
dotnet add package IronPdf

SHELL

步骤 3：更新命名空间

将wkhtmltopdf命名空间替换为IronPDF命名空间：

// Before (wkhtmltopdf)
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;

// After (IronPDF)
using IronPdf;

// Before (wkhtmltopdf)
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;

// After (IronPDF)
using IronPdf;

Imports IronPdf

Imports IronPdf

步骤 4：初始化许可证

在应用程序启动时添加许可证初始化：

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

代码迁移示例

将HTML转换为PDF

最基本的操作揭示了这些 .NET PDF 方法之间的复杂性差异。

wkhtmltopdf 方法：

// NuGet: Install-Package Haukcode.WkHtmlToPdfDotNet
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Portrait,
                PaperSize = PaperKind.A4
            },
            Objects = {
                new ObjectSettings()
                {
                    HtmlContent = "<h1>Hello World</h1><p>This is a PDF from HTML.</p>"
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("output.pdf", pdf);
    }
}

// NuGet: Install-Package Haukcode.WkHtmlToPdfDotNet
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Portrait,
                PaperSize = PaperKind.A4
            },
            Objects = {
                new ObjectSettings()
                {
                    HtmlContent = "<h1>Hello World</h1><p>This is a PDF from HTML.</p>"
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("output.pdf", pdf);
    }
}

Imports Haukcode.WkHtmlToPdfDotNet
Imports Haukcode.WkHtmlToPdfDotNet.Contracts
Imports System.IO

Module Program
    Sub Main()
        Dim converter As New SynchronizedConverter(New PdfTools())
        Dim doc As New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Portrait,
                .PaperSize = PaperKind.A4
            },
            .Objects = New List(Of ObjectSettings) From {
                New ObjectSettings() With {
                    .HtmlContent = "<h1>Hello World</h1><p>This is a PDF from HTML.</p>"
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("output.pdf", pdf)
    End Sub
End Module

Imports Haukcode.WkHtmlToPdfDotNet
Imports Haukcode.WkHtmlToPdfDotNet.Contracts
Imports System.IO

Module Program
    Sub Main()
        Dim converter As New SynchronizedConverter(New PdfTools())
        Dim doc As New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Portrait,
                .PaperSize = PaperKind.A4
            },
            .Objects = New List(Of ObjectSettings) From {
                New ObjectSettings() With {
                    .HtmlContent = "<h1>Hello World</h1><p>This is a PDF from HTML.</p>"
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("output.pdf", pdf)
    End Sub
End Module

IronPDF 方法：

// 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 a PDF from HTML.</p>");
        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("<h1>Hello World</h1><p>This is a PDF from HTML.</p>");
        pdf.SaveAs("output.pdf");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>This is a PDF from HTML.</p>")
        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("<h1>Hello World</h1><p>This is a PDF from HTML.</p>")
        pdf.SaveAs("output.pdf")
    End Sub
End Class

wkhtmltopdf 需要创建一个 SynchronizedConverter 使用 PdfTools，构造一个 HtmlToPdfDocument 使用 GlobalSettings 和 Objects，设置属性比如 ColorMode, Orientation 和 PaperSize，调用 converter.Convert() 获取原始字节，并手动使用 File.WriteAllBytes() 写入文件。

IronPDF 完全消除了这种繁琐过程——创建一个 ChromePdfRenderer，调用 RenderHtmlAsPdf()，使用内置的 SaveAs() 方法。

有关 HTML 转 PDF 的高级应用场景，请参阅 HTML 转 PDF 指南。

将 URL 转换为 PDF

URL 到 PDF 的转换显示出类似的复杂性模式。

wkhtmltopdf 方法：

// NuGet: Install-Package Haukcode.WkHtmlToPdfDotNet
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Portrait,
                PaperSize = PaperKind.A4
            },
            Objects = {
                new ObjectSettings()
                {
                    Page = "https://www.example.com"
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("webpage.pdf", pdf);
    }
}

// NuGet: Install-Package Haukcode.WkHtmlToPdfDotNet
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Portrait,
                PaperSize = PaperKind.A4
            },
            Objects = {
                new ObjectSettings()
                {
                    Page = "https://www.example.com"
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("webpage.pdf", pdf);
    }
}

Imports Haukcode.WkHtmlToPdfDotNet
Imports Haukcode.WkHtmlToPdfDotNet.Contracts
Imports System.IO

Module Program
    Sub Main()
        Dim converter As New SynchronizedConverter(New PdfTools())
        Dim doc As New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Portrait,
                .PaperSize = PaperKind.A4
            },
            .Objects = New List(Of ObjectSettings) From {
                New ObjectSettings() With {
                    .Page = "https://www.example.com"
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("webpage.pdf", pdf)
    End Sub
End Module

Imports Haukcode.WkHtmlToPdfDotNet
Imports Haukcode.WkHtmlToPdfDotNet.Contracts
Imports System.IO

Module Program
    Sub Main()
        Dim converter As New SynchronizedConverter(New PdfTools())
        Dim doc As New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Portrait,
                .PaperSize = PaperKind.A4
            },
            .Objects = New List(Of ObjectSettings) From {
                New ObjectSettings() With {
                    .Page = "https://www.example.com"
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("webpage.pdf", pdf)
    End Sub
End Module

IronPDF 方法：

// 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("webpage.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("webpage.pdf");
    }
}

Imports IronPdf
Imports System

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

wkhtmltopdf 使用 Page 属性在 ObjectSettings 中指定一个 URL，需要相同的文档构造模式。IronPDF提供一个专用的 RenderUrlAsPdf() 方法，清楚地表达意图。

请浏览 URL to PDF 文档，了解身份验证和自定义页眉选项。

自定义设置：带有页面配置的 HTML 文件

配置方向、页边距和纸张大小需要采用不同的方法。

wkhtmltopdf 方法：

// NuGet: Install-Package Haukcode.WkHtmlToPdfDotNet
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Landscape,
                PaperSize = PaperKind.A4,
                Margins = new MarginSettings() { Top = 10, Bottom = 10, Left = 10, Right = 10 }
            },
            Objects = {
                new ObjectSettings()
                {
                    Page = "input.html",
                    WebSettings = { DefaultEncoding = "utf-8" }
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("custom-output.pdf", pdf);
    }
}

// NuGet: Install-Package Haukcode.WkHtmlToPdfDotNet
using Haukcode.WkHtmlToPdfDotNet;
using Haukcode.WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Landscape,
                PaperSize = PaperKind.A4,
                Margins = new MarginSettings() { Top = 10, Bottom = 10, Left = 10, Right = 10 }
            },
            Objects = {
                new ObjectSettings()
                {
                    Page = "input.html",
                    WebSettings = { DefaultEncoding = "utf-8" }
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("custom-output.pdf", pdf);
    }
}

Imports Haukcode.WkHtmlToPdfDotNet
Imports Haukcode.WkHtmlToPdfDotNet.Contracts
Imports System.IO

Module Program
    Sub Main()
        Dim converter = New SynchronizedConverter(New PdfTools())
        Dim doc = New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Landscape,
                .PaperSize = PaperKind.A4,
                .Margins = New MarginSettings() With {.Top = 10, .Bottom = 10, .Left = 10, .Right = 10}
            },
            .Objects = {
                New ObjectSettings() With {
                    .Page = "input.html",
                    .WebSettings = New WebSettings() With {.DefaultEncoding = "utf-8"}
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("custom-output.pdf", pdf)
    End Sub
End Module

Imports Haukcode.WkHtmlToPdfDotNet
Imports Haukcode.WkHtmlToPdfDotNet.Contracts
Imports System.IO

Module Program
    Sub Main()
        Dim converter = New SynchronizedConverter(New PdfTools())
        Dim doc = New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Landscape,
                .PaperSize = PaperKind.A4,
                .Margins = New MarginSettings() With {.Top = 10, .Bottom = 10, .Left = 10, .Right = 10}
            },
            .Objects = {
                New ObjectSettings() With {
                    .Page = "input.html",
                    .WebSettings = New WebSettings() With {.DefaultEncoding = "utf-8"}
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("custom-output.pdf", pdf)
    End Sub
End Module

IronPDF 方法：

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

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape;
        renderer.RenderingOptions.MarginTop = 10;
        renderer.RenderingOptions.MarginBottom = 10;
        renderer.RenderingOptions.MarginLeft = 10;
        renderer.RenderingOptions.MarginRight = 10;
        renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
        
        var pdf = renderer.RenderHtmlFileAsPdf("input.html");
        pdf.SaveAs("custom-output.pdf");
    }
}

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

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape;
        renderer.RenderingOptions.MarginTop = 10;
        renderer.RenderingOptions.MarginBottom = 10;
        renderer.RenderingOptions.MarginLeft = 10;
        renderer.RenderingOptions.MarginRight = 10;
        renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
        
        var pdf = renderer.RenderHtmlFileAsPdf("input.html");
        pdf.SaveAs("custom-output.pdf");
    }
}

' NuGet: Install-Package IronPdf
Imports IronPdf
Imports IronPdf.Rendering
Imports System

Module Program
    Sub Main()
        Dim renderer As New ChromePdfRenderer()
        renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape
        renderer.RenderingOptions.MarginTop = 10
        renderer.RenderingOptions.MarginBottom = 10
        renderer.RenderingOptions.MarginLeft = 10
        renderer.RenderingOptions.MarginRight = 10
        renderer.RenderingOptions.PaperSize = PdfPaperSize.A4

        Dim pdf = renderer.RenderHtmlFileAsPdf("input.html")
        pdf.SaveAs("custom-output.pdf")
    End Sub
End Module

' NuGet: Install-Package IronPdf
Imports IronPdf
Imports IronPdf.Rendering
Imports System

Module Program
    Sub Main()
        Dim renderer As New ChromePdfRenderer()
        renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape
        renderer.RenderingOptions.MarginTop = 10
        renderer.RenderingOptions.MarginBottom = 10
        renderer.RenderingOptions.MarginLeft = 10
        renderer.RenderingOptions.MarginRight = 10
        renderer.RenderingOptions.PaperSize = PdfPaperSize.A4

        Dim pdf = renderer.RenderHtmlFileAsPdf("input.html")
        pdf.SaveAs("custom-output.pdf")
    End Sub
End Module

wkhtmltopdf 在 GlobalSettings 和 Objects 中嵌套设置，MarginSettings 作为一个独立的对象。IronPDF提供直接的 RenderingOptions 属性，名称清晰如 PaperOrientation, MarginTop 和 PaperSize。

wkhtmltopdf API 到IronPDF映射参考

这种映射通过显示直接的 API 对应关系来加速迁移：

CLI 到IronPDF的映射

wkhtmltopdf CLI 选项	IronPDF 同等产品
`wkhtmltopdf input.html output.pdf`	`renderer.RenderHtmlFileAsPdf()`
`wkhtmltopdf URL output.pdf`	`renderer.RenderUrlAsPdf()`
`--page-size A4`	`RenderingOptions.PaperSize = PdfPaperSize.A4`
`--page-size Letter`	`RenderingOptions.PaperSize = PdfPaperSize.Letter`
`--orientation Landscape`	`RenderingOptions.PaperOrientation = Landscape`
`--margin-top 10mm`	`RenderingOptions.MarginTop = 10`
`--margin-bottom 10mm`	`RenderingOptions.MarginBottom = 10`
`--margin-left 10mm`	`RenderingOptions.MarginLeft = 10`
`--margin-right 10mm`	`RenderingOptions.MarginRight = 10`
`--header-html header.html`	`RenderingOptions.HtmlHeader`
`--footer-center "[page]"`	`{page}` placeholder
`--footer-center "[toPage]"`	`{total-pages}` placeholder
`--enable-javascript`	默认已启用
`--javascript-delay 500`	`RenderingOptions.WaitFor.RenderDelay = 500`
`--dpi 300`	`RenderingOptions.Dpi = 300`
`--grayscale`	`RenderingOptions.GrayScale = true`

C#包装API映射

wkhtmltopdf 封装程序	IronPDF
`SynchronizedConverter`	`ChromePdfRenderer`
`HtmlToPdfDocument`	`RenderingOptions`
`GlobalSettings.Out`	`pdf.SaveAs()`
`GlobalSettings.PaperSize`	`RenderingOptions.PaperSize`
`GlobalSettings.Orientation`	`RenderingOptions.PaperOrientation`
`GlobalSettings.Margins`	`RenderingOptions.Margin*`
`ObjectSettings.Page`	`RenderHtmlFileAsPdf()`
`ObjectSettings.HtmlContent`	`RenderHtmlAsPdf()`
`converter.Convert(doc)`	`renderer.RenderHtmlAsPdf()`

占位符语法迁移

wkhtmltopdf 占位符	IronPDF 占位符
`[page]`	`{page}`
`[toPage]`	`{total-pages}`
`[date]`	`{date}`
`[time]`	`{time}`
`[title]`	`{html-title}`
`[url]`	`{url}`

常见迁移问题和解决方案

问题 1：页眉/页脚占位符语法

wkhtmltopdf: 使用方括号语法如 [page] 和 [toPage]。

**解决方案：**更新IronPDF的大括号占位符：

// Before (wkhtmltopdf)
FooterSettings = { Left = "Page [page] of [toPage]" }

// After (IronPDF)
renderer.RenderingOptions.HtmlFooter = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:left;'>Page {page} of {total-pages}</div>",
    MaxHeight = 25
};

// Before (wkhtmltopdf)
FooterSettings = { Left = "Page [page] of [toPage]" }

// After (IronPDF)
renderer.RenderingOptions.HtmlFooter = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:left;'>Page {page} of {total-pages}</div>",
    MaxHeight = 25
};

' Before (wkhtmltopdf)
FooterSettings = New With {.Left = "Page [page] of [toPage]"}

' After (IronPDF)
renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .HtmlFragment = "<div style='text-align:left;'>Page {page} of {total-pages}</div>",
    .MaxHeight = 25
}

' Before (wkhtmltopdf)
FooterSettings = New With {.Left = "Page [page] of [toPage]"}

' After (IronPDF)
renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .HtmlFragment = "<div style='text-align:left;'>Page {page} of {total-pages}</div>",
    .MaxHeight = 25
}

问题 2：JavaScript 延迟配置

wkhtmltopdf: 使用 JavaScriptDelay 属性，可靠性有限。

**解决方案：**IronPDF提供多种选择：

renderer.RenderingOptions.EnableJavaScript = true;

// Option 1: Fixed delay
renderer.RenderingOptions.WaitFor.RenderDelay(500);

// Option 2: Wait for specific element (more reliable)
renderer.RenderingOptions.WaitFor.HtmlElementById("content-loaded");

// Option 3: Wait for JavaScript condition
renderer.RenderingOptions.WaitFor.JavaScript("window.renderComplete === true");

renderer.RenderingOptions.EnableJavaScript = true;

// Option 1: Fixed delay
renderer.RenderingOptions.WaitFor.RenderDelay(500);

// Option 2: Wait for specific element (more reliable)
renderer.RenderingOptions.WaitFor.HtmlElementById("content-loaded");

// Option 3: Wait for JavaScript condition
renderer.RenderingOptions.WaitFor.JavaScript("window.renderComplete === true");

renderer.RenderingOptions.EnableJavaScript = True

' Option 1: Fixed delay
renderer.RenderingOptions.WaitFor.RenderDelay(500)

' Option 2: Wait for specific element (more reliable)
renderer.RenderingOptions.WaitFor.HtmlElementById("content-loaded")

' Option 3: Wait for JavaScript condition
renderer.RenderingOptions.WaitFor.JavaScript("window.renderComplete === true")

renderer.RenderingOptions.EnableJavaScript = True

' Option 1: Fixed delay
renderer.RenderingOptions.WaitFor.RenderDelay(500)

' Option 2: Wait for specific element (more reliable)
renderer.RenderingOptions.WaitFor.HtmlElementById("content-loaded")

' Option 3: Wait for JavaScript condition
renderer.RenderingOptions.WaitFor.JavaScript("window.renderComplete === true")

问题 3：现代 CSS 无法渲染

症状： CSS 网格和 Flexbox 布局在 wkhtmltopdf 中呈现不正确。

**解决方案：**IronPDF的 Chromium 引擎可正确处理现代 CSS：

// This CSS now works with IronPDF
var html = @"
<style>
    .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .flex { display: flex; justify-content: space-between; align-items: center; }
</style>
<div class='grid'>
    <div>Column 1</div>
    <div>Column 2</div>
    <div>Column 3</div>
</div>";

var pdf = renderer.RenderHtmlAsPdf(html);

// This CSS now works with IronPDF
var html = @"
<style>
    .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .flex { display: flex; justify-content: space-between; align-items: center; }
</style>
<div class='grid'>
    <div>Column 1</div>
    <div>Column 2</div>
    <div>Column 3</div>
</div>";

var pdf = renderer.RenderHtmlAsPdf(html);

Dim html As String = "
<style>
    .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .flex { display: flex; justify-content: space-between; align-items: center; }
</style>
<div class='grid'>
    <div>Column 1</div>
    <div>Column 2</div>
    <div>Column 3</div>
</div>"

Dim pdf = renderer.RenderHtmlAsPdf(html)

Dim html As String = "
<style>
    .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .flex { display: flex; justify-content: space-between; align-items: center; }
</style>
<div class='grid'>
    <div>Column 1</div>
    <div>Column 2</div>
    <div>Column 3</div>
</div>"

Dim pdf = renderer.RenderHtmlAsPdf(html)

第 4 期：同步与异步渲染

**wkhtmltopdf：**封装器是同步和阻塞线程。

**解决方案：**IronPDF支持异步渲染：

public async Task<byte[]> GeneratePdfAsync(string html)
{
    var renderer = new ChromePdfRenderer();
    var pdf = await renderer.RenderHtmlAsPdfAsync(html);
    return pdf.BinaryData;
}

public async Task<byte[]> GeneratePdfAsync(string html)
{
    var renderer = new ChromePdfRenderer();
    var pdf = await renderer.RenderHtmlAsPdfAsync(html);
    return pdf.BinaryData;
}

Imports System.Threading.Tasks

Public Async Function GeneratePdfAsync(html As String) As Task(Of Byte())
    Dim renderer As New ChromePdfRenderer()
    Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)
    Return pdf.BinaryData
End Function

Imports System.Threading.Tasks

Public Async Function GeneratePdfAsync(html As String) As Task(Of Byte())
    Dim renderer As New ChromePdfRenderer()
    Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)
    Return pdf.BinaryData
End Function

wkhtmltopdf迁移清单

迁移前任务

审核您的代码库，确定所有 wkhtmltopdf 的使用情况：

# Find all wkhtmltopdf references
grep -r "Haukcode.WkHtmlToPdfDotNet\|WkHtmlToPdfDotNet\|DinkToPdf\|TuesPechkin\|Rotativa\|NReco.PdfGenerator" --include="*.cs" .
grep -r "wkhtmltopdf" --include="*.yml" --include="*.yaml" --include="Dockerfile" .

# Find all wkhtmltopdf references
grep -r "Haukcode.WkHtmlToPdfDotNet\|WkHtmlToPdfDotNet\|DinkToPdf\|TuesPechkin\|Rotativa\|NReco.PdfGenerator" --include="*.cs" .
grep -r "wkhtmltopdf" --include="*.yml" --include="*.yaml" --include="Dockerfile" .

SHELL

查找并记录 wkhtmltopdf 二进制文件，以便删除。文档当前设置（纸张大小、页边距、页眉/页脚）。

代码更新任务

1.删除所有 wkhtmltopdf 封装 NuGet 软件包 2.删除 wkhtmltopdf 二进制文件（wkhtmltopdf.exe、wkhtmltox.dll） 3. 安装IronPDF NuGet包 4. 更新命名空间导入，从 Haukcode.WkHtmlToPdfDotNet (或您使用的包装器) 到 IronPdf 5. 用 ChromePdfRenderer 替换 SynchronizedConverter 6. 将 HtmlToPdfDocument 模式转换为直接渲染方法 7. 更新 GlobalSettings 配置为 RenderingOptions 8. 将边距配置从 MarginSettings 转换为独立属性 9. 更新占位符语法 ([page] → {page}, [toPage] → {total-pages}) 10.在启动时添加IronPDF许可证初始化功能

迁移后测试

迁移后，验证这些方面：

PDF 输出的可视化比较（应通过现代 CSS 支持加以改进）
验证现代 CSS 渲染（CSS 栅格和 Flexbox 现在可以使用）
测试 JavaScript 较多的页面
安全扫描以确认没有 wkhtmltopdf 二进制文件残留
性能比较负载测试

安全验证

# Scan for any remaining wkhtmltopdf artifacts
find /var/www/ -name "*wkhtmlto*" 2>/dev/null
find /usr/local/bin/ -name "*wkhtmlto*" 2>/dev/null
docker images | grep wkhtmltopdf

# Check if any process is still using it
ps aux | grep wkhtmltopdf

# Scan for any remaining wkhtmltopdf artifacts
find /var/www/ -name "*wkhtmlto*" 2>/dev/null
find /usr/local/bin/ -name "*wkhtmlto*" 2>/dev/null
docker images | grep wkhtmltopdf

# Check if any process is still using it
ps aux | grep wkhtmltopdf

SHELL

迁移到IronPDF的主要优势

从 wkhtmltopdf 迁移到IronPDF有几个关键优势：

安全性： CVE-2022-35583 和所有 wkhtmltopdf 漏洞均已消除。IronPDF没有已知的 CVE，并定期接受安全更新。

**现代渲染引擎：**IronPDF使用最新的 Chromium 引擎，确保完全支持 CSS3、CSS Grid、Flexbox 和 ES6+ JavaScript。正确呈现现代框架。

**简化 API：**直接渲染方法取代文档构造模式。内置 SaveAs() 方法消除了手动字节处理。

扩展功能： PDF 操作、数字签名、PDF/A 合规性、水印和合并/拆分操作是 wkhtmltopdf 无法提供的内置功能。

**积极开发：**IronPDF的定期更新跟踪当前的.NET发布，因此支持现代的.NET和C#语言版本。

**异步支持：**通过原生 async/await 支持，防止高负载 Web 应用程序中的线程阻塞。

请注意: DinkToPdf、NReco、Rotativa、TuesPechkin和wkhtmltopdf是其各自所有者的注册商标。本网站与DinkToPdf、NReco、Rotativa、TuesPechkin或wkhtmltopdf没有关联、认可或赞助关系。所有产品名称、徽标和品牌均为各自所有者的财产。比较仅供参考，反映撰写时公开可用的信息。