IronPDF 与 XFINIUM.PDF：.NET 平台 HTML 转 PDF 库对比

XFINIUM.PDF 规范

IronPDF C# 库的突出特点

使用Visual Studio

Visual Studio 提供了 NuGet 包管理器，用于在项目中安装包。 通过"项目"菜单或在"解决方案资源管理器"中右键单击项目来访问它。

图 1。使用 Visual Studio 中的项目菜单访问 NuGet 包管理器

图 2。使用 Visual Studio 中的上下文菜单访问 NuGet 包管理器

选定后，浏览并安装 IronPDF 软件包。

图 3。使用 Visual Studio 中的 NuGET 包管理器安装 IronPDF 库

使用开发人员命令提示

通过开发者命令提示符安装IronPDF NuGet 包：

• 打开开发者命令提示符

• 键入以下命令：

  nuget install IronPdf

  nuget install IronPdf

  SHELL
• 按回车键
• 该软件包下载并安装
• 重新加载 Visual Studio 项目

直接下载 NuGet 包

直接从 NuGet 下载并安装 IronPDF：

• 前往IronPdf NuGet 页面
• 选择下载包
• 双击下载的软件包 该软件包用于安装
• 重新加载 Visual Studio 项目

通过下载库安装 IronPDF

直接从IronPDF 下载页面下载 IronPDF .DLL 文件。

图 4。从 IronPDF 网站下载 IronPDF 库 DLL

在项目中引用该库：

• 在解决方案资源管理器中右键单击解决方案。
• 选择引用
• 浏览 IronPDF.dll 库
• 点击确定

IronPDF现在可以使用了。 接下来我们安装 XFINIUM.PDF。

使用 IronPDF.

// Create an instance of the ChromePdfRenderer
IronPdf.ChromePdfRenderer Renderer = new IronPdf.ChromePdfRenderer();

// Configure rendering options for better performance
Renderer.RenderingOptions.WaitFor.RenderDelay = 500; // Wait for JavaScript to load
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;

// Render a URL to PDF
using var Pdf = Renderer.RenderUrlAsPdf("___PROTECTED_URL_134___");

// Save the PDF with metadata
Pdf.MetaData.Author = "IronPDF";
Pdf.MetaData.Title = "Website to PDF Conversion";
Pdf.SaveAs("url.pdf");

// Create an instance of the ChromePdfRenderer
IronPdf.ChromePdfRenderer Renderer = new IronPdf.ChromePdfRenderer();

// Configure rendering options for better performance
Renderer.RenderingOptions.WaitFor.RenderDelay = 500; // Wait for JavaScript to load
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;

// Render a URL to PDF
using var Pdf = Renderer.RenderUrlAsPdf("___PROTECTED_URL_134___");

// Save the PDF with metadata
Pdf.MetaData.Author = "IronPDF";
Pdf.MetaData.Title = "Website to PDF Conversion";
Pdf.SaveAs("url.pdf");

// Create an instance of the ChromePdfRenderer
var Renderer = new IronPdf.ChromePdfRenderer();

// Configure rendering options
Renderer.RenderingOptions.MarginTop = 50; // millimeters
Renderer.RenderingOptions.MarginBottom = 50;
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;

// Render a simple HTML string to PDF
using var PDF = Renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>");

// Add document properties
PDF.MetaData.Author = "Development Team";
PDF.MetaData.Keywords = "HTML, PDF, C#";
PDF.MetaData.ModifiedDate = DateTime.Now;

// Save the PDF
PDF.SaveAs("pixel-perfect.pdf");

// Load external HTML assets: images, CSS, and javascript
// An optional BasePath 'C:\site\assets\' is set as the file location to load assets from 
using var AdvancedPDF = Renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");

// Apply security settings
AdvancedPDF.Password = "pass123";
AdvancedPDF.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;

// Save the advanced PDF with external assets
AdvancedPDF.SaveAs("html-with-assets.pdf");

// Create an instance of the ChromePdfRenderer
var Renderer = new IronPdf.ChromePdfRenderer();

// Configure rendering options
Renderer.RenderingOptions.MarginTop = 50; // millimeters
Renderer.RenderingOptions.MarginBottom = 50;
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;

// Render a simple HTML string to PDF
using var PDF = Renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>");

// Add document properties
PDF.MetaData.Author = "Development Team";
PDF.MetaData.Keywords = "HTML, PDF, C#";
PDF.MetaData.ModifiedDate = DateTime.Now;

// Save the PDF
PDF.SaveAs("pixel-perfect.pdf");

// Load external HTML assets: images, CSS, and javascript
// An optional BasePath 'C:\site\assets\' is set as the file location to load assets from 
using var AdvancedPDF = Renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");

// Apply security settings
AdvancedPDF.Password = "pass123";
AdvancedPDF.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;

// Save the advanced PDF with external assets
AdvancedPDF.SaveAs("html-with-assets.pdf");

使用 XFINIUM.PDF

使用 XFINIUM.PDF 创建空白 PDF 文档只需三行代码：创建文档、创建页面、保存：

// Create a new PDF document
PdfFixedDocument document = new PdfFixedDocument();

// Add a page to the document
PdfPage page = document.Pages.Add();

// Save the document as a PDF file
document.Save("empty.pdf");

// Create a new PDF document
PdfFixedDocument document = new PdfFixedDocument();

// Add a page to the document
PdfPage page = document.Pages.Add();

// Save the document as a PDF file
document.Save("empty.pdf");

添加文本内容需要三行额外的代码：创建字体、创建颜色画笔和绘制文本：

// Create a new PDF document
PdfFixedDocument document = new PdfFixedDocument();
PdfPage page = document.Pages.Add();

// Create a standard font with Helvetica face and 24 point size
PdfStandardFont helvetica = new PdfStandardFont(PdfStandardFontFace.Helvetica, 24);

// Create a solid RGB red brush.
PdfBrush brush = new PdfBrush(PdfRgbColor.Red);

// Draw the text on the page.
page.Graphics.DrawString("Hello World", helvetica, brush, 100, 100);

// Save the document as a PDF file
document.Save("helloworld.pdf");

// Create a new PDF document
PdfFixedDocument document = new PdfFixedDocument();
PdfPage page = document.Pages.Add();

// Create a standard font with Helvetica face and 24 point size
PdfStandardFont helvetica = new PdfStandardFont(PdfStandardFontFace.Helvetica, 24);

// Create a solid RGB red brush.
PdfBrush brush = new PdfBrush(PdfRgbColor.Red);

// Draw the text on the page.
page.Graphics.DrawString("Hello World", helvetica, brush, 100, 100);

// Save the document as a PDF file
document.Save("helloworld.pdf");

该对象模型与 PDF 标准非常相似。 这种方法在构建复杂抽象概念（例如流程文档）方面具有明显的优势。## 如何创建可填写 PDF 文件

使用 XFINIUM.PDF

XFINIUM.PDF 允许您创建新的 PDF 表单和填写现有的 PDF 表单。

每种 PDF 表单字段类型都有一个对应的类：

• PdfTextBoxField – 文本框字段
• PdfCheckBoxField – 复选框
• PdfRadioButtonField – 单选按钮集
• PdfComboboxField – 组合框
• PdfListboxField – 列表框
• PdfPushbuttonField – 按钮
• PdfSignatureField – 签名字段

要创建表单字段，请指定字段名称和页面位置。 创建字段对象后，将其添加到页面并设置其属性：

// Create a text box field named "firstname"
PdfTextBoxField firstNameTextBox = new PdfTextBoxField("firstname");

// Add the field to a PDF page
pdfpage.Fields.Add(firstNameTextBox);

// Set the position of the field on the PDF page
firstNameTextBox.Widgets[0].VisualRectangle = new PdfVisualRectangle(150, 45, 200, 20);

// Create a text box field named "firstname"
PdfTextBoxField firstNameTextBox = new PdfTextBoxField("firstname");

// Add the field to a PDF page
pdfpage.Fields.Add(firstNameTextBox);

// Set the position of the field on the PDF page
firstNameTextBox.Widgets[0].VisualRectangle = new PdfVisualRectangle(150, 45, 200, 20);

要填写现有的 PDF 表单，请将其加载到PdfFixedDocument对象中。 文档的字段集合会自动填充。 您可以按索引或名称查找字段，并通过设置值属性来填充它们：

// Load an existing PDF document with forms
PdfFixedDocument document = new PdfFixedDocument("form.pdf");

// Fill form fields with values
(document.Form.Fields["firstname"] as PdfTextBoxField).Text = "John";
(document.Form.Fields["lastname"] as PdfTextBoxField).Value = "Doe";
(document.Form.Fields["sex"].Widgets[0] as PdfRadioButtonWidget).Checked = true;
(document.Form.Fields["firstcar"] as PdfComboBoxField).SelectedIndex = 0;
(document.Form.Fields["secondcar"] as PdfListBoxField).SelectedIndex = 1;
(document.Form.Fields["agree"] as PdfCheckBoxField).Checked = true;

// Save the filled form as a new PDF file
document.Save("form_filled.pdf");

// Load an existing PDF document with forms
PdfFixedDocument document = new PdfFixedDocument("form.pdf");

// Fill form fields with values
(document.Form.Fields["firstname"] as PdfTextBoxField).Text = "John";
(document.Form.Fields["lastname"] as PdfTextBoxField).Value = "Doe";
(document.Form.Fields["sex"].Widgets[0] as PdfRadioButtonWidget).Checked = true;
(document.Form.Fields["firstcar"] as PdfComboBoxField).SelectedIndex = 0;
(document.Form.Fields["secondcar"] as PdfListBoxField).SelectedIndex = 1;
(document.Form.Fields["agree"] as PdfCheckBoxField).Checked = true;

// Save the filled form as a new PDF file
document.Save("form_filled.pdf");

使用 IronPDF.

以下是如何使用 IronPDF创建可填写 PDF 的方法：

// PM> Install-Package IronPdf
using IronPdf;
using IronPdf.Rendering;

// Step 1. Creating a PDF with editable forms from HTML using form and input tags
var FormHtml = @"
<html>
    <head>
        <style>
            body { font-family: Arial, sans-serif; margin: 40px; }
            h2 { color: #333; }
            form { background: #f4f4f4; padding: 20px; border-radius: 8px; }
            input[type='text'] { 
                width: 100%; 
                padding: 8px; 
                margin: 10px 0;
                border: 1px solid #ddd;
                border-radius: 4px;
            }
            input[type='checkbox'] { margin-right: 10px; }
            select { width: 100%; padding: 8px; margin: 10px 0; }
        </style>
    </head>
    <body>
        <h2>Editable PDF Form</h2>
        <form>
          First name:<br> <input type='text' name='firstname' value=''> <br>
          Last name:<br> <input type='text' name='lastname' value=''>
          <br><br>
          Email:<br> <input type='text' name='email' value=''>
          <br><br>
          Subscribe to newsletter: <input type='checkbox' name='newsletter' value='yes'>
          <br><br>
          Country: 
          <select name='country'>
              <option value='usa'>United States</option>
              <option value='uk'>United Kingdom</option>
              <option value='canada'>Canada</option>
          </select>
        </form>
    </body>
</html>";

// Create a PDF renderer with form creation enabled
IronPdf.ChromePdfRenderer Renderer = new IronPdf.ChromePdfRenderer();
Renderer.RenderingOptions.CreatePdfFormsFromHtml = true;
Renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print;
Renderer.RenderingOptions.MarginTop = 20;
Renderer.RenderingOptions.MarginBottom = 20;

// Render the HTML as a PDF and save it
var pdfDocument = Renderer.RenderHtmlAsPdf(FormHtml);
pdfDocument.SaveAs("BasicForm.pdf");

// Step 2. Reading and Writing PDF form values.
var FormDocument = PdfDocument.FromFile("BasicForm.pdf");

// Get form field collection
var form = FormDocument.Form;

// Set and Read the value of the "firstname" field
var FirstNameField = form.FindFormField("firstname");
FirstNameField.Value = "Minnie";
Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value);

// Set and Read the value of the "lastname" field
var LastNameField = form.FindFormField("lastname");
LastNameField.Value = "Mouse";
Console.WriteLine("LastNameField value: {0}", LastNameField.Value);

// Set email field
var EmailField = form.FindFormField("email");
EmailField.Value = "minnie.mouse@example.com";

// Set checkbox
var NewsletterField = form.FindFormField("newsletter");
NewsletterField.Value = "yes";

// Set dropdown selection
var CountryField = form.FindFormField("country");
CountryField.Value = "usa";

// Save the form with filled values
FormDocument.SaveAs("FilledForm.pdf");

// Step 3. Flattening the form (making it non-editable)
FormDocument.Form.Flatten();
FormDocument.SaveAs("FlattenedForm.pdf");

// PM> Install-Package IronPdf
using IronPdf;
using IronPdf.Rendering;

// Step 1. Creating a PDF with editable forms from HTML using form and input tags
var FormHtml = @"
<html>
    <head>
        <style>
            body { font-family: Arial, sans-serif; margin: 40px; }
            h2 { color: #333; }
            form { background: #f4f4f4; padding: 20px; border-radius: 8px; }
            input[type='text'] { 
                width: 100%; 
                padding: 8px; 
                margin: 10px 0;
                border: 1px solid #ddd;
                border-radius: 4px;
            }
            input[type='checkbox'] { margin-right: 10px; }
            select { width: 100%; padding: 8px; margin: 10px 0; }
        </style>
    </head>
    <body>
        <h2>Editable PDF Form</h2>
        <form>
          First name:<br> <input type='text' name='firstname' value=''> <br>
          Last name:<br> <input type='text' name='lastname' value=''>
          <br><br>
          Email:<br> <input type='text' name='email' value=''>
          <br><br>
          Subscribe to newsletter: <input type='checkbox' name='newsletter' value='yes'>
          <br><br>
          Country: 
          <select name='country'>
              <option value='usa'>United States</option>
              <option value='uk'>United Kingdom</option>
              <option value='canada'>Canada</option>
          </select>
        </form>
    </body>
</html>";

// Create a PDF renderer with form creation enabled
IronPdf.ChromePdfRenderer Renderer = new IronPdf.ChromePdfRenderer();
Renderer.RenderingOptions.CreatePdfFormsFromHtml = true;
Renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print;
Renderer.RenderingOptions.MarginTop = 20;
Renderer.RenderingOptions.MarginBottom = 20;

// Render the HTML as a PDF and save it
var pdfDocument = Renderer.RenderHtmlAsPdf(FormHtml);
pdfDocument.SaveAs("BasicForm.pdf");

// Step 2. Reading and Writing PDF form values.
var FormDocument = PdfDocument.FromFile("BasicForm.pdf");

// Get form field collection
var form = FormDocument.Form;

// Set and Read the value of the "firstname" field
var FirstNameField = form.FindFormField("firstname");
FirstNameField.Value = "Minnie";
Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value);

// Set and Read the value of the "lastname" field
var LastNameField = form.FindFormField("lastname");
LastNameField.Value = "Mouse";
Console.WriteLine("LastNameField value: {0}", LastNameField.Value);

// Set email field
var EmailField = form.FindFormField("email");
EmailField.Value = "minnie.mouse@example.com";

// Set checkbox
var NewsletterField = form.FindFormField("newsletter");
NewsletterField.Value = "yes";

// Set dropdown selection
var CountryField = form.FindFormField("country");
CountryField.Value = "usa";

// Save the form with filled values
FormDocument.SaveAs("FilledForm.pdf");

// Step 3. Flattening the form (making it non-editable)
FormDocument.Form.Flatten();
FormDocument.SaveAs("FlattenedForm.pdf");

首先，您需要创建一个包含 HTML 格式标签的表单。 该库可以处理保存为 PDF 时的复杂情况。 表单值的读取和写入是通过FindFormField函数完成的。 您的应用程序可以立即使用此功能以编程方式填写表单。

有关高级表单处理（包括数字签名）的信息，请参阅"创建 PDF 表单"教程。

使用 XFINIUM.PDF

签名域用于在 PDF 文件中应用数字签名（ PdfSignatureField类）。 虽然签名栏只出现在一页上，但数字签名会对整个文档进行签名。

签名过程使用PdfDigitalSignature对象来设置签名属性。 签名是在根据 PDF 文件的二进制布局保存文档时生成的。

PdfDigitalSignature为所有 XFINIUM 签名提供基础：

• PdfCmsDigitalSignature – CMS 标准签名（继承自PdfDigitalSignature ）
• PdfPadesDigitalSignature – PADES 标准签名（继承自PdfCmsDigitalSignature ）
• PdfInteractiveCmsDigitalSignature – 使用硬件智能卡的CMS 签名
• PdfInteractivePadesDigitalSignature – 支持硬件智能卡的 PADES
• PdfDocumentTimeStamp – 文档级时间戳（继承自PdfDigitalSignature ）

使用 IronPDF.

开发人员经常询问如何使用 IronPDF 和 C# 以编程方式向 PDF 添加签名。 这可能意味着：

• 从文件中添加图形签名图像 -采用加密签名以防止篡改
• 添加带有加密签名的手写签名图标

第一种方法是将签名 PNG 图片添加到现有的 PDF 页面上。 可用于签名或公司印章：

// Open an existing PDF document or create a new one
var Pdf = PdfDocument.FromFile(@"C:\Path\To\ASPX to PDF.pdf");

// Define an HTML stamp with a signature image
var SignatureStamp = new HtmlStamp()
{
    Html = "<img src='signature.png' />",
    Width = 150,
    Height = 50,
    Bottom = 300,
    Left = 85,
    ZIndex = HtmlStamp.StampLayer.OnTopOfExistingPDFContent
};

// Advanced stamp with styling
var StyledSignatureStamp = new HtmlStamp()
{
    Html = @"<div style='border: 2px solid #000; padding: 10px; background: rgba(255,255,255,0.9);'>
                <img src='signature.png' style='width: 120px;' />
                <p style='margin: 5px 0 0 0; font-size: 10px;'>Digitally Signed</p>
                <p style='margin: 0; font-size: 8px;'>{date}</p>
             </div>",
    Width = 150,
    Height = 100,
    Bottom = 50,
    Right = 50,
    ZIndex = HtmlStamp.StampLayer.OnTopOfExistingPDFContent
};

// Stamp the signature on the first page of the PDF
Pdf.StampHTML(SignatureStamp, 1);

// Or apply to all pages
Pdf.StampHTML(StyledSignatureStamp);

// Save the stamped PDF
Pdf.SaveAs(@"C:\Path\To\Stamped_PDF.pdf");

// Open an existing PDF document or create a new one
var Pdf = PdfDocument.FromFile(@"C:\Path\To\ASPX to PDF.pdf");

// Define an HTML stamp with a signature image
var SignatureStamp = new HtmlStamp()
{
    Html = "<img src='signature.png' />",
    Width = 150,
    Height = 50,
    Bottom = 300,
    Left = 85,
    ZIndex = HtmlStamp.StampLayer.OnTopOfExistingPDFContent
};

// Advanced stamp with styling
var StyledSignatureStamp = new HtmlStamp()
{
    Html = @"<div style='border: 2px solid #000; padding: 10px; background: rgba(255,255,255,0.9);'>
                <img src='signature.png' style='width: 120px;' />
                <p style='margin: 5px 0 0 0; font-size: 10px;'>Digitally Signed</p>
                <p style='margin: 0; font-size: 8px;'>{date}</p>
             </div>",
    Width = 150,
    Height = 100,
    Bottom = 50,
    Right = 50,
    ZIndex = HtmlStamp.StampLayer.OnTopOfExistingPDFContent
};

// Stamp the signature on the first page of the PDF
Pdf.StampHTML(SignatureStamp, 1);

// Or apply to all pages
Pdf.StampHTML(StyledSignatureStamp);

// Save the stamped PDF
Pdf.SaveAs(@"C:\Path\To\Stamped_PDF.pdf");

使用一行代码，通过 .pfx 和 .p12 X509Certificate2 数字证书对PDF 文件进行加密签名：

// 123456 below represents the signature password
new IronPdf.PdfSignature("CertificateFile.p12", "123456").SignPdfFile("ASPX to PDF.pdf");

// Or with more control
var signature = new IronPdf.PdfSignature("CertificateFile.p12", "123456")
{
    SigningContact = "john@example.com",
    SigningLocation = "New York, USA",
    SigningReason = "Contract Agreement"
};

// Load the PDF
var pdf = PdfDocument.FromFile("contract.pdf");

// Sign and save
pdf.SignPdfWithDigitalSignature(signature);
pdf.SaveAs("signed-contract.pdf");

// 123456 below represents the signature password
new IronPdf.PdfSignature("CertificateFile.p12", "123456").SignPdfFile("ASPX to PDF.pdf");

// Or with more control
var signature = new IronPdf.PdfSignature("CertificateFile.p12", "123456")
{
    SigningContact = "john@example.com",
    SigningLocation = "New York, USA",
    SigningReason = "Contract Agreement"
};

// Load the PDF
var pdf = PdfDocument.FromFile("contract.pdf");

// Sign and save
pdf.SignPdfWithDigitalSignature(signature);
pdf.SaveAs("signed-contract.pdf");

这个高级示例将 .pfx / .p12 X509Certificate2 数字 ID 签名与手写签名相结合：

// Create a digital signature using a certificate file
var Signature = new IronPdf.PdfSignature("Iron.pfx", "123456");

// Render a PDF document to be signed
var Renderer = new ChromePdfRenderer();
Renderer.RenderingOptions.MarginBottom = 0;
Renderer.RenderingOptions.MarginTop = 0;
Renderer.RenderingOptions.EnableJavaScript = true;
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;

// Create PDF with security features
string html = @"<h1>Contract Agreement</h1>
                <p>This document is digitally signed and encrypted.</p>
                <p>Agreement Date: " + DateTime.Now.ToString("yyyy-MM-dd") + @"</p>";

PdfDocument doc = Renderer.RenderHtmlAsPdf(html);

// Configure optional signing options and a handwritten signature graphic
Signature.SigningContact = "support@ironsoftware.com";
Signature.SigningLocation = "Chicago, USA";
Signature.SigningReason = "To show how to sign a PDF";

// Load a handwritten signature image
Signature.LoadSignatureImageFromFile("handwriting.png");

// Advanced security: Set permissions
doc.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint;
doc.SecuritySettings.AllowUserEdits = IronPdf.Security.PdfEditSecurity.NoEdit;
doc.SecuritySettings.AllowUserCopyPasteContent = false;

// Sign the PDF document with the digital signature
doc.SignPdfWithDigitalSignature(Signature);

// Add password protection
doc.Password = "userpassword";
doc.OwnerPassword = "ownerpassword";

// Save the signed PDF document
doc.SaveAs("Signed_ASPX_to_PDF.pdf");

// Create a digital signature using a certificate file
var Signature = new IronPdf.PdfSignature("Iron.pfx", "123456");

// Render a PDF document to be signed
var Renderer = new ChromePdfRenderer();
Renderer.RenderingOptions.MarginBottom = 0;
Renderer.RenderingOptions.MarginTop = 0;
Renderer.RenderingOptions.EnableJavaScript = true;
Renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;

// Create PDF with security features
string html = @"<h1>Contract Agreement</h1>
                <p>This document is digitally signed and encrypted.</p>
                <p>Agreement Date: " + DateTime.Now.ToString("yyyy-MM-dd") + @"</p>";

PdfDocument doc = Renderer.RenderHtmlAsPdf(html);

// Configure optional signing options and a handwritten signature graphic
Signature.SigningContact = "support@ironsoftware.com";
Signature.SigningLocation = "Chicago, USA";
Signature.SigningReason = "To show how to sign a PDF";

// Load a handwritten signature image
Signature.LoadSignatureImageFromFile("handwriting.png");

// Advanced security: Set permissions
doc.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint;
doc.SecuritySettings.AllowUserEdits = IronPdf.Security.PdfEditSecurity.NoEdit;
doc.SecuritySettings.AllowUserCopyPasteContent = false;

// Sign the PDF document with the digital signature
doc.SignPdfWithDigitalSignature(Signature);

// Add password protection
doc.Password = "userpassword";
doc.OwnerPassword = "ownerpassword";

// Save the signed PDF document
doc.SaveAs("Signed_ASPX_to_PDF.pdf");

要了解完整的安全实现，请查阅Ironsecuredoc 文档，了解高级文档保护功能。## 各个库如何处理现代 CSS 框架和 Bootstrap？

现代 Web 应用程序通常依赖于 Bootstrap 等 CSS 框架来实现快速 UI 开发和响应式设计。 PDF 生成工具必须准确地保留这些框架布局，以确保文档的专业质量。

IronPDF：完整的 Bootstrap 框架支持

IronPDF 的 Chromium 渲染引擎完全支持现代 CSS 框架：

• Bootstrap 5：完全支持 Flexbox 和 CSS Grid 渲染，以及所有响应式组件
• Bootstrap 4：完整的卡片系统、导航栏和实用类
• Tailwind CSS：所有实用性优先的类及其响应式变体
• Foundation 和其他框架：完全支持 CSS3，这意味着所有现代框架都能正常工作。 -高级 CSS： Flexbox、CSS Grid、自定义属性、动画和变换

实际验证：Bootstrap 首页和模板能够以浏览器精确的保真度进行转换。

代码示例: 使用 Bootstrap 卡片的事件日程

using IronPdf;

var renderer = new ChromePdfRenderer();

// Configure rendering for optimal Bootstrap output
renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
renderer.RenderingOptions.EnableJavaScript = true;
renderer.RenderingOptions.RenderDelay = 500; // Allow JS to fully load
renderer.RenderingOptions.ViewPortWidth = 1280; // Desktop viewport
renderer.RenderingOptions.MarginTop = 10;
renderer.RenderingOptions.MarginBottom = 10;
renderer.RenderingOptions.MarginLeft = 10;
renderer.RenderingOptions.MarginRight = 10;

string bootstrapSchedule = @"
<!DOCTYPE html>
<html>
<head>
    <link href='___PROTECTED_URL_135___ rel='stylesheet'>
    <style>
        @media print {
            .pagebreak { page-break-after: always; }
        }
    </style>
</head>
<body>
    <div class='container my-5'>
        <h1 class='text-center mb-5'>Tech Conference 2025 - Schedule</h1>

        <div class='row g-4'>
            <div class='col-md-6'>
                <div class='card border-primary'>
                    <div class='card-header bg-primary text-white d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Keynote Session</h5>
                        <span class='badge bg-light text-primary'>9:00 AM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Main Auditorium</h6>
                        <p class='card-text'><strong>The Future of AI in Software Development</strong></p>
                        <p class='card-text'>Join us for an exploration of how artificial intelligence is transforming the software development environment.</p>
                        <div class='d-flex align-items-center'>
                            <img src='___PROTECTED_URL_136___ class='rounded-circle me-2' alt='Speaker'>
                            <div>
                                <div class='fw-bold'>Dr. Sarah Chen</div>
                                <small class='text-muted'>AI Research Lead</small>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class='col-md-6'>
                <div class='card border-success'>
                    <div class='card-header bg-success text-white d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Workshop</h5>
                        <span class='badge bg-light text-success'>10:30 AM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Workshop Room A</h6>
                        <p class='card-text'><strong>Hands-On: Cloud-Native Architecture</strong></p>
                        <p class='card-text'>Learn practical techniques for building flexible, cloud-native applications with modern frameworks.</p>
                        <div class='d-flex align-items-center'>
                            <img src='___PROTECTED_URL_137___ class='rounded-circle me-2' alt='Speaker'>
                            <div>
                                <div class='fw-bold'>Michael Rodriguez</div>
                                <small class='text-muted'>Cloud Architect</small>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class='col-md-6'>
                <div class='card border-warning'>
                    <div class='card-header bg-warning text-dark d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Panel Discussion</h5>
                        <span class='badge bg-dark'>2:00 PM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Main Auditorium</h6>
                        <p class='card-text'><strong>Security in Modern Web Applications</strong></p>
                        <p class='card-text'>Industry experts discuss current security challenges and best practices for protecting user data.</p>
                        <small class='text-muted'>Featuring 4 industry experts</small>
                    </div>
                </div>
            </div>

            <div class='col-md-6'>
                <div class='card border-info'>
                    <div class='card-header bg-info text-white d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Technical Talk</h5>
                        <span class='badge bg-light text-info'>3:30 PM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Room B</h6>
                        <p class='card-text'><strong>Performance Optimization Strategies</strong></p>
                        <p class='card-text'>Deep dive into advanced techniques for improve application performance and reducing latency.</p>
                        <div class='d-flex align-items-center'>
                            <img src='___PROTECTED_URL_138___ class='rounded-circle me-2' alt='Speaker'>
                            <div>
                                <div class='fw-bold'>Alex Kim</div>
                                <small class='text-muted'>Performance Engineer</small>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class='pagebreak'></div>

        <h2 class='mt-5'>Additional Sessions</h2>
        <div class='table-responsive'>
            <table class='table table-striped'>
                <thead>
                    <tr>
                        <th>Time</th>
                        <th>Session</th>
                        <th>Speaker</th>
                        <th>Location</th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td>11:45 AM</td>
                        <td>Lightning Talks</td>
                        <td>Various</td>
                        <td>Room C</td>
                    </tr>
                    <tr>
                        <td>1:00 PM</td>
                        <td>Networking Lunch</td>
                        <td>-</td>
                        <td>Cafeteria</td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
</body>
</html>";

// Generate the PDF
var pdf = renderer.RenderHtmlAsPdf(bootstrapSchedule);

// Add metadata
pdf.MetaData.Author = "Tech Conference Team";
pdf.MetaData.Title = "Conference Schedule 2025";
pdf.MetaData.Subject = "Event Schedule";

// Save the PDF
pdf.SaveAs("conference-schedule.pdf");

// Example: Generate responsive invoice with Bootstrap
string bootstrapInvoice = @"
<!DOCTYPE html>
<html>
<head>
    <link href='___PROTECTED_URL_139___ rel='stylesheet'>
    <link href='___PROTECTED_URL_140___ rel='stylesheet'>
</head>
<body>
    <div class='container mt-5'>
        <div class='row'>
            <div class='col-12'>
                <div class='card'>
                    <div class='card-body'>
                        <div class='row mb-4'>
                            <div class='col-sm-6'>
                                <h2 class='text-primary'><i class='fas fa-file-invoice'></i> INVOICE</h2>
                                <p class='mb-1'><strong>Invoice #:</strong> INV-2025-001</p>
                                <p class='mb-1'><strong>Date:</strong> " + DateTime.Now.ToString("MMMM dd, yyyy") + @"</p>
                            </div>
                            <div class='col-sm-6 text-sm-end'>
                                <h4>Your Company Name</h4>
                                <p class='mb-1'>123 Business St</p>
                                <p class='mb-1'>City, State 12345</p>
                                <p>contact@company.com</p>
                            </div>
                        </div>

                        <hr>

                        <div class='row mb-4'>
                            <div class='col-sm-6'>
                                <h5>Bill To:</h5>
                                <p class='mb-1'><strong>Client Company</strong></p>
                                <p class='mb-1'>456 Client Ave</p>
                                <p>City, State 67890</p>
                            </div>
                        </div>

                        <div class='table-responsive'>
                            <table class='table table-bordered'>
                                <thead class='table-primary'>
                                    <tr>
                                        <th>Description</th>
                                        <th class='text-center'>Quantity</th>
                                        <th class='text-end'>Price</th>
                                        <th class='text-end'>Total</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    <tr>
                                        <td>Web Development Services</td>
                                        <td class='text-center'>40</td>
                                        <td class='text-end'>$150.00</td>
                                        <td class='text-end'>$6,000.00</td>
                                    </tr>
                                    <tr>
                                        <td>UI/UX Design</td>
                                        <td class='text-center'>20</td>
                                        <td class='text-end'>$125.00</td>
                                        <td class='text-end'>$2,500.00</td>
                                    </tr>
                                </tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan='3' class='text-end'><strong>Subtotal:</strong></td>
                                        <td class='text-end'><strong>$8,500.00</strong></td>
                                    </tr>
                                    <tr>
                                        <td colspan='3' class='text-end'>Tax (10%):</td>
                                        <td class='text-end'>$850.00</td>
                                    </tr>
                                    <tr class='table-primary'>
                                        <td colspan='3' class='text-end'><strong>Total Due:</strong></td>
                                        <td class='text-end'><strong>$9,350.00</strong></td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>

                        <div class='alert alert-info mt-4'>
                            <i class='fas fa-info-circle'></i> Payment is due within 30 days. Thank you for your business!
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>";

var invoicePdf = renderer.RenderHtmlAsPdf(bootstrapInvoice);
invoicePdf.SaveAs("bootstrap-invoice.pdf");

using IronPdf;

var renderer = new ChromePdfRenderer();

// Configure rendering for optimal Bootstrap output
renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
renderer.RenderingOptions.EnableJavaScript = true;
renderer.RenderingOptions.RenderDelay = 500; // Allow JS to fully load
renderer.RenderingOptions.ViewPortWidth = 1280; // Desktop viewport
renderer.RenderingOptions.MarginTop = 10;
renderer.RenderingOptions.MarginBottom = 10;
renderer.RenderingOptions.MarginLeft = 10;
renderer.RenderingOptions.MarginRight = 10;

string bootstrapSchedule = @"
<!DOCTYPE html>
<html>
<head>
    <link href='___PROTECTED_URL_135___ rel='stylesheet'>
    <style>
        @media print {
            .pagebreak { page-break-after: always; }
        }
    </style>
</head>
<body>
    <div class='container my-5'>
        <h1 class='text-center mb-5'>Tech Conference 2025 - Schedule</h1>

        <div class='row g-4'>
            <div class='col-md-6'>
                <div class='card border-primary'>
                    <div class='card-header bg-primary text-white d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Keynote Session</h5>
                        <span class='badge bg-light text-primary'>9:00 AM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Main Auditorium</h6>
                        <p class='card-text'><strong>The Future of AI in Software Development</strong></p>
                        <p class='card-text'>Join us for an exploration of how artificial intelligence is transforming the software development environment.</p>
                        <div class='d-flex align-items-center'>
                            <img src='___PROTECTED_URL_136___ class='rounded-circle me-2' alt='Speaker'>
                            <div>
                                <div class='fw-bold'>Dr. Sarah Chen</div>
                                <small class='text-muted'>AI Research Lead</small>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class='col-md-6'>
                <div class='card border-success'>
                    <div class='card-header bg-success text-white d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Workshop</h5>
                        <span class='badge bg-light text-success'>10:30 AM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Workshop Room A</h6>
                        <p class='card-text'><strong>Hands-On: Cloud-Native Architecture</strong></p>
                        <p class='card-text'>Learn practical techniques for building flexible, cloud-native applications with modern frameworks.</p>
                        <div class='d-flex align-items-center'>
                            <img src='___PROTECTED_URL_137___ class='rounded-circle me-2' alt='Speaker'>
                            <div>
                                <div class='fw-bold'>Michael Rodriguez</div>
                                <small class='text-muted'>Cloud Architect</small>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <div class='col-md-6'>
                <div class='card border-warning'>
                    <div class='card-header bg-warning text-dark d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Panel Discussion</h5>
                        <span class='badge bg-dark'>2:00 PM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Main Auditorium</h6>
                        <p class='card-text'><strong>Security in Modern Web Applications</strong></p>
                        <p class='card-text'>Industry experts discuss current security challenges and best practices for protecting user data.</p>
                        <small class='text-muted'>Featuring 4 industry experts</small>
                    </div>
                </div>
            </div>

            <div class='col-md-6'>
                <div class='card border-info'>
                    <div class='card-header bg-info text-white d-flex justify-content-between align-items-center'>
                        <h5 class='mb-0'>Technical Talk</h5>
                        <span class='badge bg-light text-info'>3:30 PM</span>
                    </div>
                    <div class='card-body'>
                        <h6 class='card-subtitle mb-2 text-muted'>Room B</h6>
                        <p class='card-text'><strong>Performance Optimization Strategies</strong></p>
                        <p class='card-text'>Deep dive into advanced techniques for improve application performance and reducing latency.</p>
                        <div class='d-flex align-items-center'>
                            <img src='___PROTECTED_URL_138___ class='rounded-circle me-2' alt='Speaker'>
                            <div>
                                <div class='fw-bold'>Alex Kim</div>
                                <small class='text-muted'>Performance Engineer</small>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <div class='pagebreak'></div>

        <h2 class='mt-5'>Additional Sessions</h2>
        <div class='table-responsive'>
            <table class='table table-striped'>
                <thead>
                    <tr>
                        <th>Time</th>
                        <th>Session</th>
                        <th>Speaker</th>
                        <th>Location</th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td>11:45 AM</td>
                        <td>Lightning Talks</td>
                        <td>Various</td>
                        <td>Room C</td>
                    </tr>
                    <tr>
                        <td>1:00 PM</td>
                        <td>Networking Lunch</td>
                        <td>-</td>
                        <td>Cafeteria</td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
</body>
</html>";

// Generate the PDF
var pdf = renderer.RenderHtmlAsPdf(bootstrapSchedule);

// Add metadata
pdf.MetaData.Author = "Tech Conference Team";
pdf.MetaData.Title = "Conference Schedule 2025";
pdf.MetaData.Subject = "Event Schedule";

// Save the PDF
pdf.SaveAs("conference-schedule.pdf");

// Example: Generate responsive invoice with Bootstrap
string bootstrapInvoice = @"
<!DOCTYPE html>
<html>
<head>
    <link href='___PROTECTED_URL_139___ rel='stylesheet'>
    <link href='___PROTECTED_URL_140___ rel='stylesheet'>
</head>
<body>
    <div class='container mt-5'>
        <div class='row'>
            <div class='col-12'>
                <div class='card'>
                    <div class='card-body'>
                        <div class='row mb-4'>
                            <div class='col-sm-6'>
                                <h2 class='text-primary'><i class='fas fa-file-invoice'></i> INVOICE</h2>
                                <p class='mb-1'><strong>Invoice #:</strong> INV-2025-001</p>
                                <p class='mb-1'><strong>Date:</strong> " + DateTime.Now.ToString("MMMM dd, yyyy") + @"</p>
                            </div>
                            <div class='col-sm-6 text-sm-end'>
                                <h4>Your Company Name</h4>
                                <p class='mb-1'>123 Business St</p>
                                <p class='mb-1'>City, State 12345</p>
                                <p>contact@company.com</p>
                            </div>
                        </div>

                        <hr>

                        <div class='row mb-4'>
                            <div class='col-sm-6'>
                                <h5>Bill To:</h5>
                                <p class='mb-1'><strong>Client Company</strong></p>
                                <p class='mb-1'>456 Client Ave</p>
                                <p>City, State 67890</p>
                            </div>
                        </div>

                        <div class='table-responsive'>
                            <table class='table table-bordered'>
                                <thead class='table-primary'>
                                    <tr>
                                        <th>Description</th>
                                        <th class='text-center'>Quantity</th>
                                        <th class='text-end'>Price</th>
                                        <th class='text-end'>Total</th>
                                    </tr>
                                </thead>
                                <tbody>
                                    <tr>
                                        <td>Web Development Services</td>
                                        <td class='text-center'>40</td>
                                        <td class='text-end'>$150.00</td>
                                        <td class='text-end'>$6,000.00</td>
                                    </tr>
                                    <tr>
                                        <td>UI/UX Design</td>
                                        <td class='text-center'>20</td>
                                        <td class='text-end'>$125.00</td>
                                        <td class='text-end'>$2,500.00</td>
                                    </tr>
                                </tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan='3' class='text-end'><strong>Subtotal:</strong></td>
                                        <td class='text-end'><strong>$8,500.00</strong></td>
                                    </tr>
                                    <tr>
                                        <td colspan='3' class='text-end'>Tax (10%):</td>
                                        <td class='text-end'>$850.00</td>
                                    </tr>
                                    <tr class='table-primary'>
                                        <td colspan='3' class='text-end'><strong>Total Due:</strong></td>
                                        <td class='text-end'><strong>$9,350.00</strong></td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>

                        <div class='alert alert-info mt-4'>
                            <i class='fas fa-info-circle'></i> Payment is due within 30 days. Thank you for your business!
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>";

var invoicePdf = renderer.RenderHtmlAsPdf(bootstrapInvoice);
invoicePdf.SaveAs("bootstrap-invoice.pdf");

输出：一个专业的会议日程表，采用 Bootstrap 的卡片网格、flexbox 对齐方式、徽章组件和响应式布局——所有内容都准确地渲染在 PDF 中。

XFINIUM.PDF：有限的 HTML 和框架支持

XFINIUM.PDF 专注于 PDF 的生成和处理，而不是 HTML 到 PDF 的转换。 该库在 Bootstrap 和现代 CSS 框架方面存在显著限制：

-不支持原生 HTML 渲染： XFINIUM.PDF 不包含内置的 HTML 到 PDF 转换引擎。 -仅支持基本 HTML：仅限于简单的 HTML 结构，不支持高级 CSS -不支持 Bootstrap：不支持带有 flexbox 和 CSS Grid 的现代 Bootstrap 框架（4/5 版本）。 -需要采取变通方法：开发人员必须使用底层 PDF API 手动重新创建布局。 -需要外部工具：可能需要与外部 HTML 渲染引擎集成

开发影响：使用 Bootstrap 或现代 CSS 框架的应用程序无法使用 XFINIUM.PDF 直接将其 UI 转换为 PDF。 开发人员必须：

1. 使用 XFINIUM.PDF 的低级绘图 API 重建布局（显著开发时间）
2. 集成外部 HTML 渲染工具（增加复杂性和依赖关系）
3. 维护与 Web UI 平行的单独 PDF 布局代码（维护开销）

对于需要使用现代框架将 HTML 转换为 PDF 的项目，XFINIUM.PDF 的局限性需要进行大量的额外开发。

如需了解 Bootstrap 和现代 CSS 框架的完整支持，请参阅 Bootstrap 和 Flexbox CSS 指南。

XFINIUM.PDF 定价和许可

每个软件包都有两个版本：生成器版本用于 PDF 生成/编辑，查看器版本包含所有生成器功能以及 PDF 渲染和查看功能。

每个开发者都需要许可证。

• 可免版税分发至无限数量的桌面/服务器。
• 协助订阅包含一年的更新/支持服务。

价格范围为每年 290.00 美元至 872.00 美元。

IronPDF 定价和许可

IronPDF 可供开发使用，并可随时授权用于商业用途。授权选项包括单项目授权、单个开发者授权、代理机构授权、跨国组织授权以及 SaaS/OEM 再分发授权。 所有许可证均包含 30 天退款保证、一年支持/升级、开发/测试/生产有效期以及永久许可证（一次性购买）。 Lite 套餐起价为$799 ，无任何经常性费用。