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; using System; // Step 1. Creating a PDF with editable forms from HTML using form and input tags // Radio Button and Checkbox can also be implemented with input type 'radio' and 'checkbox' const string formHtml = @" <html> <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> <p>Please specify your gender:</p> <input type='radio' id='female' name='gender' value= 'Female'> <label for='female'>Female</label> <br> <br> <input type='radio' id='male' name='gender' value='Male'> <label for='male'>Male</label> <br> <br> <input type='radio' id='non-binary/other' name='gender' value='Non-Binary / Other'> <label for='non-binary/other'>Non-Binary / Other</label> <br> <p>Please select all medical conditions that apply:</p> <input type='checkbox' id='condition1' name='Hypertension' value='Hypertension'> <label for='condition1'> Hypertension</label><br> <input type='checkbox' id='condition2' name='Heart Disease' value='Heart Disease'> <label for='condition2'> Heart Disease</label><br> <input type='checkbox' id='condition3' name='Stoke' value='Stoke'> <label for='condition3'> Stoke</label><br> <input type='checkbox' id='condition4' name='Diabetes' value='Diabetes'> <label for='condition4'> Diabetes</label><br> <input type='checkbox' id='condition5' name='Kidney Disease' value='Kidney Disease'> <label for='condition5'> Kidney Disease</label><br> </form> </body> </html>"; // Instantiate Renderer var renderer = new ChromePdfRenderer(); renderer.RenderingOptions.CreatePdfFormsFromHtml = true; renderer.RenderHtmlAsPdf(formHtml).SaveAs("BasicForm.pdf"); // Step 2. Reading and Writing PDF form values. var FormDocument = PdfDocument.FromFile("BasicForm.pdf"); // Set and Read the value of the "firstname" field var FirstNameField = FormDocument.Form.FindFormField("firstname"); FirstNameField.Value = "Minnie"; Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value); // Set and Read the value of the "lastname" field var LastNameField = FormDocument.Form.FindFormField("lastname"); LastNameField.Value = "Mouse"; Console.WriteLine("LastNameField value: {0}", LastNameField.Value); FormDocument.SaveAs("FilledForm.pdf");

使用IRONPDF

从HTML文件在C#中创建PDF

更新 2024年一月20日

IronPDF 可通过编程将 HTML 转换为 PDF 文档。

如何用 C# 创建 PDF - HTML 转 PDF 示例

这种技术的一个简单示例可以是下载和观看.

整篇文章的源代码可作为 C# 的 C# HTML 转 PDF 项目源代码下载.

下面的教程将指导您将 IronPDF 用作 PDF生成器 C#.它涵盖了基础知识以及许多高级 C# PDF 主题。

HTML 转 PDF C#

下载将 HTML 转换为 PDF 的 C# 库
用代码从 HTML 字符串创建 PDF
用代码从 HTML 文件创建 PDF
轻松将 URL 转换为 PDF 文档
将 PDF 文件导出到所需位置

HTML 转 PDF 演练

该演示通过实例向您介绍如何使用 IronPdf。请随时要求提供其他用例演示.

演示包括 Hello World、将Html渲染为Pdf 和将URL渲染为PDF 示例。所有示例均可在 IronPDF 演示解决方案下的相应项目中找到。

步骤 1：安装

你可以通过 NuGet 安装 IronPdf。软件包名称为 IronPDF.

或者您可以使用下载资料库的直接链接.

第 2 步：你好，世界

在项目中安装并引用 IronPDF 后，只需键入几个字符串，就可以立即开始使用它了：

var ChromePdfRenderer = new ChromePdfRenderer();  // new instance of ChromePdfRenderer

var ChromePdfRenderer = new ChromePdfRenderer();  // new instance of ChromePdfRenderer

Dim ChromePdfRenderer As New ChromePdfRenderer() ' new instance of ChromePdfRenderer

VB C#

那么如果您需要将 HTML 转换成 PDF

// html to turn into pdf
var html = @"<h1>Hello World!</h1><br><p>This is IronPdf.</p>";
// turn html to pdf
using var pdf = ChromePdfRenderer.RenderHtmlAsPdf(html);
// save resulting pdf into file
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "ChromePdfRenderer.Pdf"));

// html to turn into pdf
var html = @"<h1>Hello World!</h1><br><p>This is IronPdf.</p>";
// turn html to pdf
using var pdf = ChromePdfRenderer.RenderHtmlAsPdf(html);
// save resulting pdf into file
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "ChromePdfRenderer.Pdf"));

' html to turn into pdf
Dim html = "<h1>Hello World!</h1><br><p>This is IronPdf.</p>"
' turn html to pdf
Dim pdf = ChromePdfRenderer.RenderHtmlAsPdf(html)
' save resulting pdf into file
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "ChromePdfRenderer.Pdf"))

VB C#

或者如果您想将网页转化为 PDF 文件

// uri of the page to turn into pdf
var uri = new Uri("http://www.google.com/ncr");
// turn page into pdf
pdf = ChromePdfRenderer.RenderUrlAsPdf(uri);
// save resulting pdf into file
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdf.Pdf"));

// uri of the page to turn into pdf
var uri = new Uri("http://www.google.com/ncr");
// turn page into pdf
pdf = ChromePdfRenderer.RenderUrlAsPdf(uri);
// save resulting pdf into file
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdf.Pdf"));

' uri of the page to turn into pdf
Dim uri As New Uri("http://www.google.com/ncr")
' turn page into pdf
pdf = ChromePdfRenderer.RenderUrlAsPdf(uri)
' save resulting pdf into file
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdf.Pdf"))

VB C#

就是这样!

相应的结果是

用 C# 从 HTML 文件创建 PDF，图 1：将 HTML 转换为 PDF 的结果

将 HTML 转换为 PDF** 的结果

用 C# 从 HTML 文件创建 PDF，图 2：将网页转换为 PDF 的结果

将网页转换为 PDF 的结果

请在 IronPDFDemo.HelloWorld 项目下查看代码示例。

步骤 3：RenderHtmlAsPdf

示例 1

举一个更真实的例子，想象一张 HTML 发票需要转换成 PDF。下面是如何转换的代码。

注：您可以在 IronPDFDemo.DemoWebSite 项目下找到发票 html。 (~/Static/TestInvoice1.html).请注意，发票上有针对 "打印 "媒体类型的自定义 CSS。

源发票在浏览器中看起来是这样的：

用 C# 从 HTML 文件创建 PDF，图 4：

要将其转化为 PDF 文件，需要使用与上述 HelloWorld 示例类似的代码，不同之处在于 HTML 源文件。

// read html from file
var html = File.ReadAllText(Path.Combine(Directory.GetCurrentDirectory(), "TestInvoice1.html"));
var ChromePdfRenderer = new ChromePdfRenderer();
using var pdf = ChromePdfRenderer.RenderHtmlAsPdf(html);
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "ChromePdfRendererExample1.Pdf"));

// read html from file
var html = File.ReadAllText(Path.Combine(Directory.GetCurrentDirectory(), "TestInvoice1.html"));
var ChromePdfRenderer = new ChromePdfRenderer();
using var pdf = ChromePdfRenderer.RenderHtmlAsPdf(html);
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "ChromePdfRendererExample1.Pdf"));

' read html from file
Dim html = File.ReadAllText(Path.Combine(Directory.GetCurrentDirectory(), "TestInvoice1.html"))
Dim ChromePdfRenderer As New ChromePdfRenderer()
Dim pdf = ChromePdfRenderer.RenderHtmlAsPdf(html)
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "ChromePdfRendererExample1.Pdf"))

VB C#

结果是

在 C# 中从 HTML 文件创建 PDF，图 5：从 HTML 生成 PDF 文件

从 HTML 生成 PDF 文件

看起来不错! 请在 IronPDFDemo.RenderHtmlAdPdfDemo 项目下查找代码示例。

也可在如何在 IronPDF 中使用带字节数组的 HTML 文档或字符串

示例 2

本节将帮助定制例 1 中生成的 PDF。例如，它将为标准发票的 "打印 "媒体类型添加自定义页边距、带有文档标题的页眉、带有创建日期和印章的页脚、页码和一些自定义 CSS。为此，我们将初始化一个 ChromePdfRenderOptions 实例，并将其传入 ChromePdfRenderer 构造函数。

var pdfRenderingOptions= new ChromePdfRenderOptions()
{
    MarginTop = 50,
    MarginBottom = 50,
    TextHeader = new TextHeaderFooter()
    {
        CenterText = "{pdf-title}",
        DrawDividerLine = true,
        FontSize = 16
    },
    TextFooter = new TextHeaderFooter()
    {
        LeftText = "{date} {time}",
        RightText = "Page {page} of {total-pages}",
        DrawDividerLine = true,
        FontSize = 14
    },
    CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
};
var chromePdfRenderer = new ChromePdfRenderer(pdfRenderingOptions);

var pdfRenderingOptions= new ChromePdfRenderOptions()
{
    MarginTop = 50,
    MarginBottom = 50,
    TextHeader = new TextHeaderFooter()
    {
        CenterText = "{pdf-title}",
        DrawDividerLine = true,
        FontSize = 16
    },
    TextFooter = new TextHeaderFooter()
    {
        LeftText = "{date} {time}",
        RightText = "Page {page} of {total-pages}",
        DrawDividerLine = true,
        FontSize = 14
    },
    CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
};
var chromePdfRenderer = new ChromePdfRenderer(pdfRenderingOptions);

Dim pdfRenderingOptions= New ChromePdfRenderOptions() With {
	.MarginTop = 50,
	.MarginBottom = 50,
	.TextHeader = New TextHeaderFooter() With {
		.CenterText = "{pdf-title}",
		.DrawDividerLine = True,
		.FontSize = 16
	},
	.TextFooter = New TextHeaderFooter() With {
		.LeftText = "{date} {time}",
		.RightText = "Page {page} of {total-pages}",
		.DrawDividerLine = True,
		.FontSize = 14
	},
	.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
}
Dim chromePdfRenderer As New ChromePdfRenderer(pdfRenderingOptions)

VB C#

提示： 你可以为 "ChromePdfRenderer "实例设置相应的字段，而不是在构造函数中将选项作为参数传递：

var chromePdfRenderer = new ChromePdfRenderer();
chromePdfRenderer.RenderingOptions = pdfRenderingOptions;

var chromePdfRenderer = new ChromePdfRenderer();
chromePdfRenderer.RenderingOptions = pdfRenderingOptions;

Dim chromePdfRenderer As New ChromePdfRenderer()
chromePdfRenderer.RenderingOptions = pdfRenderingOptions

VB C#

注：页眉和页脚具有合并功能，这意味着所有合并字段 ({页码}, {总页数}, {网址}, {日期}, {时间}, {html-title}, {pdf标题}) 可以填充相应的数据。

其余代码与例 1 相同。结果是

在 C# 中从 HTML 文件创建 PDF，图 6：生成带页眉和页脚的发票

生成带页眉和页脚的发票

打印 "媒体类型的自定义页边距、页眉、页脚和 CSS 现已就绪。请在 IronPDFDemo.RenderHtmlAdPdfDemo 项目下查看代码示例。更多设置可在 IronPDF API 参考.

步骤 4：RenderUrlAsPdf

设置

要运行本节中的示例，需要在本地托管 IronPDFDemo.DemoWebSite。要做到这一点，请使用 IIS Express：

1.导航至演示网站

2.右键单击 > 设置为启动项目

3.不调试启动 (Ctrl+F5)

4.导航至您的 {基址}/Static/TestInvoice1.html 以确保其正常工作。这是 URL http://localhost:51169/Static/TestInvoice1.html (如果您不更改相应的项目设置，您的项目设置将保持不变).

示例 1

在本节中，使用与 HelloWorld 示例相同的代码，将托管的 DemoWebSite 发票转换为 PDF。不同之处在于托管的 URL：

var uri = new Uri("http://localhost:51169/Static/TestInvoice1.html");
var urlToPdf = new ChromePdfRenderer();
using var pdf = urlToPdf.RenderUrlAsPdf(uri);
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdfExample1.Pdf"));

var uri = new Uri("http://localhost:51169/Static/TestInvoice1.html");
var urlToPdf = new ChromePdfRenderer();
using var pdf = urlToPdf.RenderUrlAsPdf(uri);
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdfExample1.Pdf"));

Dim uri As New Uri("http://localhost:51169/Static/TestInvoice1.html")
Dim urlToPdf = New ChromePdfRenderer()
Dim pdf = urlToPdf.RenderUrlAsPdf(uri)
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdfExample1.Pdf"))

VB C#

结果是

在 C# 中从 HTML 文件创建 PDF，图 7：将托管网站生成 PDF

将托管网站生成 PDF

这很好，看起来和预期的一样。请查看 IronPDFDemo.RenderUrlAsPdfDemo 项目中的代码示例。

示例 2

许多网站通常都受到身份验证方法的保护。本部分在渲染 PDF 文件的过程中使用了提供的用户名和密码，并进行了一些自定义：自定义页边距、包含文件标题的页眉、包含创建日期和页数的页脚，以及 "打印 "媒体类型的自定义 CSS。发票的 URL 地址为 http://localhost:51169/Invoice.

访问 http://localhost:51169/Invoice 的结果是 "需要验证 "表单：

在 C# 中从 HTML 文件创建 PDF，图 8：需要验证的表单

需要认证的表格

注：凭据为 "testUser"/"testPassword"。

那么如何绕过身份验证呢？通过设置 HttpLoginCredentials：

var uri = new Uri("http://localhost:51169/Invoice");
var urlToPdf = new ChromePdfRenderer
{
    PrintOptions = new ChromePdfRenderer()
    {
        MarginTop = 50,
        MarginBottom = 50,
        TextHeader = new TextHeaderFooter()
        {
            CenterText = "{pdf-title}",
            DrawDividerLine = true,
            FontSize = 16
        },
        TextFooter = new TextHeaderFooter()
        {
            LeftText = "{date} {time}",
            RightText = "Page {page} of {total-pages}",
            DrawDividerLine = true,
            FontSize = 14
        },
        CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
    },
    // setting login credentials to bypass basic authentication
    LoginCredentials = new HttpLoginCredentials()
    {
        NetworkUsername = "testUser",
        NetworkPassword = "testPassword"
    }
};
using var pdf = urlToPdf.RenderUrlAsPdf(uri);
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdfExample2.Pdf"));

var uri = new Uri("http://localhost:51169/Invoice");
var urlToPdf = new ChromePdfRenderer
{
    PrintOptions = new ChromePdfRenderer()
    {
        MarginTop = 50,
        MarginBottom = 50,
        TextHeader = new TextHeaderFooter()
        {
            CenterText = "{pdf-title}",
            DrawDividerLine = true,
            FontSize = 16
        },
        TextFooter = new TextHeaderFooter()
        {
            LeftText = "{date} {time}",
            RightText = "Page {page} of {total-pages}",
            DrawDividerLine = true,
            FontSize = 14
        },
        CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
    },
    // setting login credentials to bypass basic authentication
    LoginCredentials = new HttpLoginCredentials()
    {
        NetworkUsername = "testUser",
        NetworkPassword = "testPassword"
    }
};
using var pdf = urlToPdf.RenderUrlAsPdf(uri);
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdfExample2.Pdf"));

Dim uri As New Uri("http://localhost:51169/Invoice")
Dim urlToPdf = New ChromePdfRenderer With {
	.PrintOptions = New ChromePdfRenderer() With {
		.MarginTop = 50,
		.MarginBottom = 50,
		.TextHeader = New TextHeaderFooter() With {
			.CenterText = "{pdf-title}",
			.DrawDividerLine = True,
			.FontSize = 16
		},
		.TextFooter = New TextHeaderFooter() With {
			.LeftText = "{date} {time}",
			.RightText = "Page {page} of {total-pages}",
			.DrawDividerLine = True,
			.FontSize = 14
		},
		.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
	},
	.LoginCredentials = New HttpLoginCredentials() With {
		.NetworkUsername = "testUser",
		.NetworkPassword = "testPassword"
	}
}
Dim pdf = urlToPdf.RenderUrlAsPdf(uri)
pdf.SaveAs(Path.Combine(Directory.GetCurrentDirectory(), "UrlToPdfExample2.Pdf"))

VB C#