使用IronPDF进行ASP.NET的HTML到PDF转换

using IronPdf;

// Optional global configuration (place in Program.cs)
Installation.TempFolderPath = @"C:\Temp\IronPdf\";
Installation.LinuxAndDockerDependenciesAutoConfig = true;

// Enable logging for debugging PDF rendering issues
Installation.LoggingMode = IronPdf.Logging.LoggingMode.All;
Installation.LogFilePath = "IronPdfLog.log";

// Required for Azure App Service deployments
Installation.AzureQuickDeployment = true;

Imports IronPdf

' Optional global configuration
Installation.TempFolderPath = "C:\Temp\IronPdf\"
Installation.LinuxAndDockerDependenciesAutoConfig = True

' Enable logging for debugging PDF rendering issues
Installation.LoggingMode = IronPdf.Logging.LoggingMode.All
Installation.LogFilePath = "IronPdfLog.log"

' Required for Azure App Service deployments
Installation.AzureQuickDeployment = True

var html = @"
    <style>
        body { font-family: Arial, sans-serif; margin: 40px; }
        h1 { color: #2c3e50; border-bottom: 2px solid #3498db; }
        .highlight { background-color: #f1c40f; padding: 5px; }
        .data-table { width: 100%; border-collapse: collapse; }
        .data-table td { border: 1px solid #ddd; padding: 8px; }
    </style>
    <h1>Monthly Report</h1>
    <p>This document includes <span class='highlight'>highlighted text</span> and table data.</p>
    <table class='data-table'>
        <tr><td>Product</td><td>Sales</td></tr>
        <tr><td>Widget A</td><td>$1,234</td></tr>
    </table>";

var renderer = new ChromePdfRenderer();

// Set base 网址 so relative resource paths resolve correctly
renderer.RenderingOptions.BaseUrl = new Uri("https://yourdomain.com/");
renderer.RenderingOptions.EnableJavaScript = true;

var pdf = renderer.RenderHtmlAsPdf(html);
pdf.SaveAs("styled-report.pdf");

Dim html As String = "
    <style>
        body { font-family: Arial, sans-serif; margin: 40px; }
        h1 { color: #2c3e50; border-bottom: 2px solid #3498db; }
        .highlight { background-color: #f1c40f; padding: 5px; }
        .data-table { width: 100%; border-collapse: collapse; }
        .data-table td { border: 1px solid #ddd; padding: 8px; }
    </style>
    <h1>Monthly Report</h1>
    <p>This document includes <span class='highlight'>highlighted text</span> and table data.</p>
    <table class='data-table'>
        <tr><td>Product</td><td>Sales</td></tr>
        <tr><td>Widget A</td><td>$1,234</td></tr>
    </table>"

Dim renderer As New ChromePdfRenderer()

' Set base URL so relative resource paths resolve correctly
renderer.RenderingOptions.BaseUrl = New Uri("https://yourdomain.com/")
renderer.RenderingOptions.EnableJavaScript = True

Dim pdf = renderer.RenderHtmlAsPdf(html)
pdf.SaveAs("styled-report.pdf")

[HttpGet]
public async Task<IActionResult> DownloadPdf()
{
    var invoiceModel = new InvoiceModel
    {
        InvoiceNumber = 12345,
        Date = DateTime.Now,
        CustomerName = "Acme Corporation",
        Items = new List<InvoiceItem>
        {
            new InvoiceItem { Description = "Service", Quantity = 1, Price = 100.0 },
            new InvoiceItem { Description = "Support", Quantity = 2, Price = 50.0 }
        },
        Total = 200.0
    };

    // Render the Razor view to an HTML string first
    var htmlContent = await RenderViewToString("Invoice", invoiceModel);

    var renderer = new ChromePdfRenderer();
    renderer.RenderingOptions.PaperSize = PdfPaperSize.Letter;
    renderer.RenderingOptions.PrintHtmlBackgrounds = true;

    // Add a text header with the invoice number
    renderer.RenderingOptions.TextHeader.CenterText = "Invoice #" + invoiceModel.InvoiceNumber;
    renderer.RenderingOptions.TextHeader.DrawDividerLine = true;

    var pdf = renderer.RenderHtmlAsPdf(htmlContent);

    // Restrict copying while allowing printing
    pdf.SecuritySettings.AllowUserPrinting = true;
    pdf.SecuritySettings.AllowUserCopyPasteContent = false;

    var fileName = $"invoice_{invoiceModel.InvoiceNumber}_{DateTime.Now:yyyyMMdd}.pdf";
    return File(pdf.BinaryData, "application/pdf", fileName);
}

Imports System
Imports System.Collections.Generic
Imports System.Threading.Tasks
Imports Microsoft.AspNetCore.Mvc

<HttpGet>
Public Async Function DownloadPdf() As Task(Of IActionResult)
    Dim invoiceModel = New InvoiceModel With {
        .InvoiceNumber = 12345,
        .Date = DateTime.Now,
        .CustomerName = "Acme Corporation",
        .Items = New List(Of InvoiceItem) From {
            New InvoiceItem With {.Description = "Service", .Quantity = 1, .Price = 100.0},
            New InvoiceItem With {.Description = "Support", .Quantity = 2, .Price = 50.0}
        },
        .Total = 200.0
    }

    ' Render the Razor view to an HTML string first
    Dim htmlContent = Await RenderViewToString("Invoice", invoiceModel)

    Dim renderer = New ChromePdfRenderer()
    renderer.RenderingOptions.PaperSize = PdfPaperSize.Letter
    renderer.RenderingOptions.PrintHtmlBackgrounds = True

    ' Add a text header with the invoice number
    renderer.RenderingOptions.TextHeader.CenterText = "Invoice #" & invoiceModel.InvoiceNumber
    renderer.RenderingOptions.TextHeader.DrawDividerLine = True

    Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)

    ' Restrict copying while allowing printing
    pdf.SecuritySettings.AllowUserPrinting = True
    pdf.SecuritySettings.AllowUserCopyPasteContent = False

    Dim fileName = $"invoice_{invoiceModel.InvoiceNumber}_{DateTime.Now:yyyyMMdd}.pdf"
    Return File(pdf.BinaryData, "application/pdf", fileName)
End Function

[HttpGet]
public IActionResult GeneratePdfFromUrl()
{
    var renderer = new ChromePdfRenderer();

    // Allow time for dynamic content to load before capture
    renderer.RenderingOptions.WaitFor.RenderDelay = 2000;
    renderer.RenderingOptions.ViewportWidth = 1920;

    // Pass authorization headers if the page requires authentication
    renderer.RenderingOptions.HttpHeaders.Add("Authorization", "Bearer your-token");

    var pdf = renderer.RenderUrlAsPdf("https://yourwebsite.com/report");

    // Compress embedded images to reduce file size
    pdf.CompressImages(90);

    return File(pdf.BinaryData, "application/pdf", "webpage.pdf");
}

Imports Microsoft.AspNetCore.Mvc

<HttpGet>
Public Function GeneratePdfFromUrl() As IActionResult
    Dim renderer = New ChromePdfRenderer()

    ' Allow time for dynamic content to load before capture
    renderer.RenderingOptions.WaitFor.RenderDelay = 2000
    renderer.RenderingOptions.ViewportWidth = 1920

    ' Pass authorization headers if the page requires authentication
    renderer.RenderingOptions.HttpHeaders.Add("Authorization", "Bearer your-token")

    Dim pdf = renderer.RenderUrlAsPdf("https://yourwebsite.com/report")

    ' Compress embedded images to reduce file size
    pdf.CompressImages(90)

    Return File(pdf.BinaryData, "application/pdf", "webpage.pdf")
End Function

var renderer = new ChromePdfRenderer();

// Set standard paper size and orientation
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait;

// Set page margins in millimeters
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;
renderer.RenderingOptions.MarginLeft = 20;
renderer.RenderingOptions.MarginRight = 20;

// Define a custom paper size in inches when needed
renderer.RenderingOptions.SetCustomPaperSizeInInches(8.5, 11);

// Use print CSS media type for print-optimized output
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print;
renderer.RenderingOptions.PrintHtmlBackgrounds = true;

Dim renderer = New ChromePdfRenderer()

' Set standard paper size and orientation
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait

' Set page margins in millimeters
renderer.RenderingOptions.MarginTop = 25
renderer.RenderingOptions.MarginBottom = 25
renderer.RenderingOptions.MarginLeft = 20
renderer.RenderingOptions.MarginRight = 20

' Define a custom paper size in inches when needed
renderer.RenderingOptions.SetCustomPaperSizeInInches(8.5, 11)

' Use print CSS media type for print-optimized output
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print
renderer.RenderingOptions.PrintHtmlBackgrounds = True

// Simple text header and footer with dynamic placeholders
renderer.RenderingOptions.TextHeader = new TextHeaderFooter()
{
    CenterText = "Company Report",
    LeftText = "{date}",
    RightText = "Confidential",
    FontSize = 12,
    FontFamily = "Arial",
    DrawDividerLine = true
};

renderer.RenderingOptions.TextFooter = new TextHeaderFooter()
{
    CenterText = "Page {page} of {total-pages}",
    LeftText = "© 2025 Company Name",
    DrawDividerLine = true
};

// For complex branded headers, use an HTML fragment instead
renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter()
{
    HtmlFragment = @"
        <div style='display: flex; justify-content: space-between; align-items: center;'>
            <img src='logo.png' height='30' />
            <h2>Monthly Report</h2>
            <span>{date}</span>
        </div>",
    MaxHeight = 50,
    DrawDividerLine = true
};

' Simple text header and footer with dynamic placeholders
renderer.RenderingOptions.TextHeader = New TextHeaderFooter() With {
    .CenterText = "Company Report",
    .LeftText = "{date}",
    .RightText = "Confidential",
    .FontSize = 12,
    .FontFamily = "Arial",
    .DrawDividerLine = True
}

renderer.RenderingOptions.TextFooter = New TextHeaderFooter() With {
    .CenterText = "Page {page} of {total-pages}",
    .LeftText = "© 2025 Company Name",
    .DrawDividerLine = True
}

' For complex branded headers, use an HTML fragment instead
renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter() With {
    .HtmlFragment = "
        <div style='display: flex; justify-content: space-between; align-items: center;'>
            <img src='logo.png' height='30' />
            <h2>Monthly Report</h2>
            <span>{date}</span>
        </div>",
    .MaxHeight = 50,
    .DrawDividerLine = True
}