HTML到PDF中使用自定义字体

import {PdfDocument, WaitForType} from "@ironsoftware/ironpdf";

(async () => {
    // Define the HTML content with a custom font from Google Fonts
    const htmlWithFont = `
        <h1>Google Font</h1>
        <link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet">
        <p style="font-family: 'Lobster', serif; font-size:30px;">Hello Google Fonts</p>
    `;

    // Configure render options
    const options = {
        // Delay render to finish font loading
        waitFor: {
            type: WaitForType.RenderDelay,
            maxWaitTime: 500,
        },
    };

    // Render HTML content with the custom font to a PDF
    const doc = await PdfDocument.fromHtml(htmlWithFont, { renderOptions: options });

    // Save the PDF
    await doc.saveAs("font.pdf");
})();

HTML到PDF中使用自定义字体

为了确保需要加载时间的资产正确呈现，必须使用waitFor类指定呈现延迟。这包括 JavaScript、字体和网络资源等资产。

要使用来自 Google Fonts 的自定义字体呈现 HTML 内容，请配置渲染选项以使用waitFor属性。将等待类型设置为RenderDelay，并指定最大等待时间为500毫秒。

在渲染HTML之后，使用IronPDF 的PDF生成库导出PDF文档。您可以检查生成的PDF以查看自定义字体是否完美加载和显示。

// C# Example Code for Rendering HTML with custom font using IronPDF

using IronPdf;

class Program
{
    static void Main()
    {
        // Step 1: Initialize the Renderer
        var Renderer = new HtmlToPdf();

        // Configure rendering options to wait for specific assets to load
        Renderer.PrintOptions.WaitFor = WebBrowserEvent.RenderDelay;
        Renderer.PrintOptions.RenderDelay = 500; // Maximum wait time set to 500 milliseconds

        // Step 2: Define HTML with a custom Google Font link
        string htmlContent = @"
        <!DOCTYPE html>
        <html lang='en'>
        <head>
            <meta charset='UTF-8'>
            <meta name='viewport' content='width=device-width, initial-scale=1.0'>
            <link href='https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap' rel='stylesheet'>
            <style>
                body {
                    font-family: 'Roboto', sans-serif;
                }
                h1 {
                    font-weight: 700;
                }
            </style>
            <title>Sample PDF</title>
        </head>
        <body>
            <h1>Hello, World!</h1>
            <p>This is a paragraph with a custom Google font.</p>
        </body>
        </html>";

        // Step 3: Render the HTML to a PDF document
        var pdfDocument = Renderer.RenderHtmlAsPdf(htmlContent);

        // Step 4: Export the PDF document to a file
        pdfDocument.SaveAs("SampleWithFonts.pdf");

        // Output completion message
        Console.WriteLine("PDF document created successfully with custom Google font!");
    }
}

// C# Example Code for Rendering HTML with custom font using IronPDF

using IronPdf;

class Program
{
    static void Main()
    {
        // Step 1: Initialize the Renderer
        var Renderer = new HtmlToPdf();

        // Configure rendering options to wait for specific assets to load
        Renderer.PrintOptions.WaitFor = WebBrowserEvent.RenderDelay;
        Renderer.PrintOptions.RenderDelay = 500; // Maximum wait time set to 500 milliseconds

        // Step 2: Define HTML with a custom Google Font link
        string htmlContent = @"
        <!DOCTYPE html>
        <html lang='en'>
        <head>
            <meta charset='UTF-8'>
            <meta name='viewport' content='width=device-width, initial-scale=1.0'>
            <link href='https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap' rel='stylesheet'>
            <style>
                body {
                    font-family: 'Roboto', sans-serif;
                }
                h1 {
                    font-weight: 700;
                }
            </style>
            <title>Sample PDF</title>
        </head>
        <body>
            <h1>Hello, World!</h1>
            <p>This is a paragraph with a custom Google font.</p>
        </body>
        </html>";

        // Step 3: Render the HTML to a PDF document
        var pdfDocument = Renderer.RenderHtmlAsPdf(htmlContent);

        // Step 4: Export the PDF document to a file
        pdfDocument.SaveAs("SampleWithFonts.pdf");

        // Output completion message
        Console.WriteLine("PDF document created successfully with custom Google font!");
    }
}

' C# Example Code for Rendering HTML with custom font using IronPDF

Imports IronPdf

Friend Class Program
	Shared Sub Main()
		' Step 1: Initialize the Renderer
		Dim Renderer = New HtmlToPdf()

		' Configure rendering options to wait for specific assets to load
		Renderer.PrintOptions.WaitFor = WebBrowserEvent.RenderDelay
		Renderer.PrintOptions.RenderDelay = 500 ' Maximum wait time set to 500 milliseconds

		' Step 2: Define HTML with a custom Google Font link
		Dim htmlContent As String = "
        <!DOCTYPE html>
        <html lang='en'>
        <head>
            <meta charset='UTF-8'>
            <meta name='viewport' content='width=device-width, initial-scale=1.0'>
            <link href='https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap' rel='stylesheet'>
            <style>
                body {
                    font-family: 'Roboto', sans-serif;
                }
                h1 {
                    font-weight: 700;
                }
            </style>
            <title>Sample PDF</title>
        </head>
        <body>
            <h1>Hello, World!</h1>
            <p>This is a paragraph with a custom Google font.</p>
        </body>
        </html>"

		' Step 3: Render the HTML to a PDF document
		Dim pdfDocument = Renderer.RenderHtmlAsPdf(htmlContent)

		' Step 4: Export the PDF document to a file
		pdfDocument.SaveAs("SampleWithFonts.pdf")

		' Output completion message
		Console.WriteLine("PDF document created successfully with custom Google font!")
	End Sub
End Class

$vbLabelText $csharpLabel

在GitHub上探索Google Fonts到PDF示例。