如何使用C#在ASP.NET中生成PDF

建立專案

我們將透過執行以下指令來創建這個專案並給予適當的專案名稱：

dotnet new mvc -n PdfGeneratorApp
cd PdfGeneratorApp

安裝 IronPDF

在我們開始在ASP.NET中生成PDF文件之前，請透過在NuGet套件管理器主控台中執行以下命令將IronPDF添加到您的專案：

Install-Package IronPdf

Install-Package IronPdf.Extensions.Mvc.Core

有關詳細的安裝選項，包括NuGet套件配置和Windows安裝程式，請參閱官方文件。

在 Program.cs 中配置服務

using IronPdf;
using IronPdf.Extensions.Mvc.Core;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
var builder = WebApplication.CreateBuilder(args);
// Configure IronPDF license (use your license key)
License.LicenseKey = "your-license-key";
// Add MVC services
builder.Services.AddControllersWithViews();
// Register IronPDF services
builder.Services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
builder.Services.AddSingleton<ITempDataProvider, CookieTempDataProvider>();
builder.Services.AddSingleton<IRazorViewRenderer, RazorViewRenderer>();
// Configure ChromePdfRenderer as a service
builder.Services.AddSingleton<ChromePdfRenderer>(provider =>
{
    var renderer = new ChromePdfRenderer();
    // Configure rendering options
    renderer.RenderingOptions.MarginTop = 25;
    renderer.RenderingOptions.MarginBottom = 25;
    renderer.RenderingOptions.MarginLeft = 20;
    renderer.RenderingOptions.MarginRight = 20;
    renderer.RenderingOptions.EnableJavaScript = true;
    renderer.RenderingOptions.RenderDelay = 500; // Wait for JS execution
    return renderer;
});
var app = builder.Build();
// Configure middleware pipeline
if (!app.Environment.IsDevelopment())
{
    app.Use例外Handler("/Home/Error");
    app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");
app.Run();

using IronPdf;
using IronPdf.Extensions.Mvc.Core;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
var builder = WebApplication.CreateBuilder(args);
// Configure IronPDF license (use your license key)
License.LicenseKey = "your-license-key";
// Add MVC services
builder.Services.AddControllersWithViews();
// Register IronPDF services
builder.Services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
builder.Services.AddSingleton<ITempDataProvider, CookieTempDataProvider>();
builder.Services.AddSingleton<IRazorViewRenderer, RazorViewRenderer>();
// Configure ChromePdfRenderer as a service
builder.Services.AddSingleton<ChromePdfRenderer>(provider =>
{
    var renderer = new ChromePdfRenderer();
    // Configure rendering options
    renderer.RenderingOptions.MarginTop = 25;
    renderer.RenderingOptions.MarginBottom = 25;
    renderer.RenderingOptions.MarginLeft = 20;
    renderer.RenderingOptions.MarginRight = 20;
    renderer.RenderingOptions.EnableJavaScript = true;
    renderer.RenderingOptions.RenderDelay = 500; // Wait for JS execution
    return renderer;
});
var app = builder.Build();
// Configure middleware pipeline
if (!app.Environment.IsDevelopment())
{
    app.Use例外Handler("/Home/Error");
    app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");
app.Run();

此配置將IronPDF設置為單例服務，以確保在您的應用程式中高效使用資源。 您可以進一步修改 RenderingOptions\ 以符合您的特定需求。 在此時，您在 Visual Studio 的方案總管中的資料夾結構應該看起來像：

建立數據模型

首先，讓我們創建一個代表典型商業文件的綜合模型：

namespace PdfGeneratorApp.Models
{
    public class InvoiceModel
    {
        public string InvoiceNumber { get; set; }
        public DateTime InvoiceDate { get; set; }
        public DateTime DueDate { get; set; }
        public CompanyInfo Vendor { get; set; }
        public CompanyInfo Customer { get; set; }
        public List<InvoiceItem> Items { get; set; }
        public decimal Subtotal => Items?.Sum(x => x.Total) ?? 0;
        public decimal TaxRate { get; set; }
        public decimal TaxAmount => Subtotal * (TaxRate / 100);
        public decimal Total => Subtotal + TaxAmount;
        public string Notes { get; set; }
        public string PaymentTerms { get; set; }
    }
    public class CompanyInfo
    {
        public string Name { get; set; }
        public string Address { get; set; }
        public string City { get; set; }
        public string State { get; set; }
        public string ZipCode { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }
    }
    public class InvoiceItem
    {
        public string Description { get; set; }
        public int Quantity { get; set; }
        public decimal UnitPrice { get; set; }
        public decimal Total => Quantity * UnitPrice;
    }
}

namespace PdfGeneratorApp.Models
{
    public class InvoiceModel
    {
        public string InvoiceNumber { get; set; }
        public DateTime InvoiceDate { get; set; }
        public DateTime DueDate { get; set; }
        public CompanyInfo Vendor { get; set; }
        public CompanyInfo Customer { get; set; }
        public List<InvoiceItem> Items { get; set; }
        public decimal Subtotal => Items?.Sum(x => x.Total) ?? 0;
        public decimal TaxRate { get; set; }
        public decimal TaxAmount => Subtotal * (TaxRate / 100);
        public decimal Total => Subtotal + TaxAmount;
        public string Notes { get; set; }
        public string PaymentTerms { get; set; }
    }
    public class CompanyInfo
    {
        public string Name { get; set; }
        public string Address { get; set; }
        public string City { get; set; }
        public string State { get; set; }
        public string ZipCode { get; set; }
        public string Email { get; set; }
        public string Phone { get; set; }
    }
    public class InvoiceItem
    {
        public string Description { get; set; }
        public int Quantity { get; set; }
        public decimal UnitPrice { get; set; }
        public decimal Total => Quantity * UnitPrice;
    }
}

構建Razor視圖

在 Views/Invoice/InvoiceTemplate.cshtml 中建立一個視圖，以呈現您的PDF內容：

@model PdfGeneratorApp.Models.InvoiceModel
@{
    Layout = null; // PDFs should not use the site layout
}
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Invoice @Model.InvoiceNumber</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
        }
        .invoice-container {
            max-width: 800px;
            margin: 0 auto;
            padding: 30px;
        }
        .invoice-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 2px solid #2c3e50;
        }
        .company-details {
            flex: 1;
        }
        .company-details h1 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        .invoice-details {
            text-align: right;
        }
        .invoice-details h2 {
            color: #2c3e50;
            font-size: 28px;
            margin-bottom: 10px;
        }
        .invoice-details p {
            margin: 5px 0;
            font-size: 14px;
        }
        .billing-details {
            display: flex;
            justify-content: space-between;
            margin-bottom: 40px;
        }
        .billing-section {
            flex: 1;
        }
        .billing-section h3 {
            color: #2c3e50;
            margin-bottom: 10px;
            font-size: 16px;
            text-transform: uppercase;
        }
        .items-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 40px;
        }
        .items-table thead {
            background-color: #2c3e50;
            color: white;
        }
        .items-table th,
        .items-table td {
            padding: 12px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        .items-table tbody tr:hover {
            background-color: #f5f5f5;
        }
        .text-right {
            text-align: right;
        }
        .invoice-summary {
            display: flex;
            justify-content: flex-end;
            margin-bottom: 40px;
        }
        .summary-table {
            width: 300px;
        }
        .summary-table tr {
            border-bottom: 1px solid #ddd;
        }
        .summary-table td {
            padding: 8px;
        }
        .summary-table .total-row {
            font-weight: bold;
            font-size: 18px;
            color: #2c3e50;
            border-top: 2px solid #2c3e50;
        }
        .invoice-footer {
            margin-top: 60px;
            padding-top: 20px;
            border-top: 1px solid #ddd;
        }
        .footer-notes {
            margin-bottom: 20px;
        }
        .footer-notes h4 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        @@media print {
            .invoice-container {
                padding: 0;
            }
        }
    </style>
</head>
<body>
    <div class="invoice-container">
        <div class="invoice-header">
            <div class="company-details">
                <h1>@Model.Vendor.Name</h1>
                <p>@Model.Vendor.Address</p>
                <p>@Model.Vendor.City, @Model.Vendor.State @Model.Vendor.ZipCode</p>
                <p>Email: @Model.Vendor.Email</p>
                <p>Phone: @Model.Vendor.Phone</p>
            </div>
            <div class="invoice-details">
                <h2>INVOICE</h2>
                <p><strong>Invoice #:</strong> @Model.InvoiceNumber</p>
                <p><strong>Date:</strong> @Model.InvoiceDate.ToString("MMM dd, yyyy")</p>
                <p><strong>Due Date:</strong> @Model.DueDate.ToString("MMM dd, yyyy")</p>
            </div>
        </div>
        <div class="billing-details">
            <div class="billing-section">
                <h3>Bill To:</h3>
                <p><strong>@Model.Customer.Name</strong></p>
                <p>@Model.Customer.Address</p>
                <p>@Model.Customer.City, @Model.Customer.State @Model.Customer.ZipCode</p>
                <p>@Model.Customer.Email</p>
            </div>
        </div>
        <table class="items-table">
            <thead>
                <tr>
                    <th>Description</th>
                    <th class="text-right">Quantity</th>
                    <th class="text-right">Unit Price</th>
                    <th class="text-right">Total</th>
                </tr>
            </thead>
            <tbody>
                @foreach (var item in Model.Items)
                {
                    <tr>
                        <td>@item.Description</td>
                        <td class="text-right">@item.Quantity</td>
                        <td class="text-right">@item.UnitPrice.ToString("C")</td>
                        <td class="text-right">@item.Total.ToString("C")</td>
                    </tr>
                }
            </tbody>
        </table>
        <div class="invoice-summary">
            <table class="summary-table">
                <tr>
                    <td>Subtotal:</td>
                    <td class="text-right">@Model.Subtotal.ToString("C")</td>
                </tr>
                <tr>
                    <td>Tax (@Model.TaxRate%):</td>
                    <td class="text-right">@Model.TaxAmount.ToString("C")</td>
                </tr>
                <tr class="total-row">
                    <td>Total:</td>
                    <td class="text-right">@Model.Total.ToString("C")</td>
                </tr>
            </table>
        </div>
        @if (!string.IsNullOrEmpty(Model.Notes))
        {
            <div class="invoice-footer">
                <div class="footer-notes">
                    <h4>Notes</h4>
                    <p>@Model.Notes</p>
                </div>
            </div>
        }
        @if (!string.IsNullOrEmpty(Model.PaymentTerms))
        {
            <div class="footer-notes">
                <h4>Payment Terms</h4>
                <p>@Model.PaymentTerms</p>
            </div>
        }
    </div>
</body>
</html>

@model PdfGeneratorApp.Models.InvoiceModel
@{
    Layout = null; // PDFs should not use the site layout
}
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Invoice @Model.InvoiceNumber</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
        }
        .invoice-container {
            max-width: 800px;
            margin: 0 auto;
            padding: 30px;
        }
        .invoice-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 2px solid #2c3e50;
        }
        .company-details {
            flex: 1;
        }
        .company-details h1 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        .invoice-details {
            text-align: right;
        }
        .invoice-details h2 {
            color: #2c3e50;
            font-size: 28px;
            margin-bottom: 10px;
        }
        .invoice-details p {
            margin: 5px 0;
            font-size: 14px;
        }
        .billing-details {
            display: flex;
            justify-content: space-between;
            margin-bottom: 40px;
        }
        .billing-section {
            flex: 1;
        }
        .billing-section h3 {
            color: #2c3e50;
            margin-bottom: 10px;
            font-size: 16px;
            text-transform: uppercase;
        }
        .items-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 40px;
        }
        .items-table thead {
            background-color: #2c3e50;
            color: white;
        }
        .items-table th,
        .items-table td {
            padding: 12px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        .items-table tbody tr:hover {
            background-color: #f5f5f5;
        }
        .text-right {
            text-align: right;
        }
        .invoice-summary {
            display: flex;
            justify-content: flex-end;
            margin-bottom: 40px;
        }
        .summary-table {
            width: 300px;
        }
        .summary-table tr {
            border-bottom: 1px solid #ddd;
        }
        .summary-table td {
            padding: 8px;
        }
        .summary-table .total-row {
            font-weight: bold;
            font-size: 18px;
            color: #2c3e50;
            border-top: 2px solid #2c3e50;
        }
        .invoice-footer {
            margin-top: 60px;
            padding-top: 20px;
            border-top: 1px solid #ddd;
        }
        .footer-notes {
            margin-bottom: 20px;
        }
        .footer-notes h4 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        @@media print {
            .invoice-container {
                padding: 0;
            }
        }
    </style>
</head>
<body>
    <div class="invoice-container">
        <div class="invoice-header">
            <div class="company-details">
                <h1>@Model.Vendor.Name</h1>
                <p>@Model.Vendor.Address</p>
                <p>@Model.Vendor.City, @Model.Vendor.State @Model.Vendor.ZipCode</p>
                <p>Email: @Model.Vendor.Email</p>
                <p>Phone: @Model.Vendor.Phone</p>
            </div>
            <div class="invoice-details">
                <h2>INVOICE</h2>
                <p><strong>Invoice #:</strong> @Model.InvoiceNumber</p>
                <p><strong>Date:</strong> @Model.InvoiceDate.ToString("MMM dd, yyyy")</p>
                <p><strong>Due Date:</strong> @Model.DueDate.ToString("MMM dd, yyyy")</p>
            </div>
        </div>
        <div class="billing-details">
            <div class="billing-section">
                <h3>Bill To:</h3>
                <p><strong>@Model.Customer.Name</strong></p>
                <p>@Model.Customer.Address</p>
                <p>@Model.Customer.City, @Model.Customer.State @Model.Customer.ZipCode</p>
                <p>@Model.Customer.Email</p>
            </div>
        </div>
        <table class="items-table">
            <thead>
                <tr>
                    <th>Description</th>
                    <th class="text-right">Quantity</th>
                    <th class="text-right">Unit Price</th>
                    <th class="text-right">Total</th>
                </tr>
            </thead>
            <tbody>
                @foreach (var item in Model.Items)
                {
                    <tr>
                        <td>@item.Description</td>
                        <td class="text-right">@item.Quantity</td>
                        <td class="text-right">@item.UnitPrice.ToString("C")</td>
                        <td class="text-right">@item.Total.ToString("C")</td>
                    </tr>
                }
            </tbody>
        </table>
        <div class="invoice-summary">
            <table class="summary-table">
                <tr>
                    <td>Subtotal:</td>
                    <td class="text-right">@Model.Subtotal.ToString("C")</td>
                </tr>
                <tr>
                    <td>Tax (@Model.TaxRate%):</td>
                    <td class="text-right">@Model.TaxAmount.ToString("C")</td>
                </tr>
                <tr class="total-row">
                    <td>Total:</td>
                    <td class="text-right">@Model.Total.ToString("C")</td>
                </tr>
            </table>
        </div>
        @if (!string.IsNullOrEmpty(Model.Notes))
        {
            <div class="invoice-footer">
                <div class="footer-notes">
                    <h4>Notes</h4>
                    <p>@Model.Notes</p>
                </div>
            </div>
        }
        @if (!string.IsNullOrEmpty(Model.PaymentTerms))
        {
            <div class="footer-notes">
                <h4>Payment Terms</h4>
                <p>@Model.PaymentTerms</p>
            </div>
        }
    </div>
</body>
</html>

實施控制器與錯誤處理

現在讓我們來創建一個具有全面錯誤處理功能的強大控制器來生成PDF：

using IronPdf;
using IronPdf.Extensions.Mvc.Core;
using Microsoft.AspNetCore.Mvc;
using PdfGeneratorApp.Models;
using System.Diagnostics;
namespace PdfGeneratorApp.Controllers
{
    public class InvoiceController : Controller
    {
        private readonly ILogger<InvoiceController> _logger;
        private readonly IRazorViewRenderer _viewRenderer;
        private readonly ChromePdfRenderer _pdfRenderer;
        private readonly IWebHostEnvironment _environment;
        public InvoiceController(
            ILogger<InvoiceController> logger,
            IRazorViewRenderer viewRenderer,
            ChromePdfRenderer pdfRenderer,
            IWebHostEnvironment environment)
        {
            _logger = logger;
            _viewRenderer = viewRenderer;
            _pdfRenderer = pdfRenderer;
            _environment = environment;
        }
        [HttpGet]
        public IActionResult Index()
        {
            // Display a form or list of invoices
            return View();
        }
        [HttpGet]
        public async Task<IActionResult> GenerateInvoice(string invoiceNumber)
        {
            var stopwatch = Stopwatch.StartNew();
            try
            {
                // Validate input
                if (string.IsNullOrEmpty(invoiceNumber))
                {
                    _logger.LogWarning("Invoice generation attempted without invoice number");
                    return BadRequest("Invoice number is required");
                }
                // Generate sample data (in production, fetch from database)
                var invoice = CreateSampleInvoice(invoiceNumber);
                // Log the generation attempt
                _logger.LogInformation($"Generating PDF for invoice {invoiceNumber}");
                // Configure PDF rendering options
                _pdfRenderer.RenderingOptions.PaperOrientation = IronPdf.Rendering.PdfPaperOrientation.Portrait;
                _pdfRenderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4;
                _pdfRenderer.RenderingOptions.PrintHtmlBackgrounds = true;
                _pdfRenderer.RenderingOptions.CreatePdfFormsFromHtml = false;
                // Add custom header with page numbers
                _pdfRenderer.RenderingOptions.TextHeader = new TextHeaderFooter
                {
                    CenterText = $"Invoice {invoice.InvoiceNumber}",
                    DrawDividerLine = true,
                    Font = IronSoftware.Drawing.FontTypes.Helvetica,
                    FontSize = 10
                };
                // Add footer with page numbers
                _pdfRenderer.RenderingOptions.TextFooter = new TextHeaderFooter
                {
                    LeftText = "{date} {time}",
                    RightText = "Page {page} of {total-pages}",
                    DrawDividerLine = true,
                    Font = IronSoftware.Drawing.FontTypes.Helvetica,
                    FontSize = 8
                };
                // Render the view to PDF
                PdfDocument pdf;
                try
                {
                    pdf = _pdfRenderer.RenderRazorViewToPdf(
                        _viewRenderer,
                        "Views/Invoice/InvoiceTemplate.cshtml",
                        invoice);
                }
                catch (例外 renderEx)
                {
                    _logger.LogError(renderEx, "Failed to render Razor view to PDF");
                    throw new InvalidOperation例外("PDF rendering failed. Please check the template.", renderEx);
                }
                // Apply metadata
                pdf.MetaData.Author = "PdfGeneratorApp";
                pdf.MetaData.Title = $"Invoice {invoice.InvoiceNumber}";
                pdf.MetaData.Subject = $"Invoice for {invoice.Customer.Name}";
                pdf.MetaData.Keywords = "invoice, billing, payment";
                pdf.MetaData.CreationDate = DateTime.UtcNow;
                pdf.MetaData.ModifiedDate = DateTime.UtcNow;
                // Optional: Add password protection
                // pdf.SecuritySettings.UserPassword = "user123";
                // pdf.SecuritySettings.OwnerPassword = "owner456";
                // pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;
                // Log performance metrics
                stopwatch.Stop();
                _logger.LogInformation($"PDF generated successfully for invoice {invoiceNumber} in {stopwatch.ElapsedMilliseconds}ms");
                // Return the PDF file
                Response.Headers.Add("Content-Disposition", $"inline; filename=Invoice_{invoiceNumber}.pdf");
                return File(pdf.BinaryData, "application/pdf", $"Invoice_{invoiceNumber}.pdf");
            }
            catch (例外 ex)
            {
                _logger.LogError(ex, $"Error generating PDF for invoice {invoiceNumber}");
                // In development, return detailed error
                if (_environment.IsDevelopment())
                {
                    return StatusCode(500, new
                    {
                        error = "PDF generation failed",
                        message = ex.Message,
                        stackTrace = ex.StackTrace
                    });
                }
                // In production, return generic error
                return StatusCode(500, "An error occurred while generating the PDF");
            }
        }
        private InvoiceModel CreateSampleInvoice(string invoiceNumber)
        {
            return new InvoiceModel
            {
                InvoiceNumber = invoiceNumber,
                InvoiceDate = DateTime.Now,
                DueDate = DateTime.Now.AddDays(30),
                Vendor = new CompanyInfo
                {
                    Name = "Tech 解決方案s Inc.",
                    Address = "123 Business Ave",
                    City = "New York",
                    State = "NY",
                    ZipCode = "10001",
                    Email = "billing@techsolutions.com",
                    Phone = "(555) 123-4567"
                },
                Customer = new CompanyInfo
                {
                    Name = "Acme Corporation",
                    Address = "456 Commerce St",
                    City = "Los Angeles",
                    State = "CA",
                    ZipCode = "90001",
                    Email = "accounts@acmecorp.com",
                    Phone = "(555) 987-6543"
                },
                Items = new List<InvoiceItem>
                {
                    new InvoiceItem
                    {
                        Description = "Software Development Services - 40 hours",
                        Quantity = 40,
                        UnitPrice = 150.00m
                    },
                    new InvoiceItem
                    {
                        Description = "Project Management - 10 hours",
                        Quantity = 10,
                        UnitPrice = 120.00m
                    },
                    new InvoiceItem
                    {
                        Description = "Quality Assurance Testing",
                        Quantity = 1,
                        UnitPrice = 2500.00m
                    }
                },
                TaxRate = 8.875m,
                Notes = "Payment is due within 30 days. Late payments subject to 1.5% monthly interest.",
                PaymentTerms = "Net 30"
            };
        }
    }
}

using IronPdf;
using IronPdf.Extensions.Mvc.Core;
using Microsoft.AspNetCore.Mvc;
using PdfGeneratorApp.Models;
using System.Diagnostics;
namespace PdfGeneratorApp.Controllers
{
    public class InvoiceController : Controller
    {
        private readonly ILogger<InvoiceController> _logger;
        private readonly IRazorViewRenderer _viewRenderer;
        private readonly ChromePdfRenderer _pdfRenderer;
        private readonly IWebHostEnvironment _environment;
        public InvoiceController(
            ILogger<InvoiceController> logger,
            IRazorViewRenderer viewRenderer,
            ChromePdfRenderer pdfRenderer,
            IWebHostEnvironment environment)
        {
            _logger = logger;
            _viewRenderer = viewRenderer;
            _pdfRenderer = pdfRenderer;
            _environment = environment;
        }
        [HttpGet]
        public IActionResult Index()
        {
            // Display a form or list of invoices
            return View();
        }
        [HttpGet]
        public async Task<IActionResult> GenerateInvoice(string invoiceNumber)
        {
            var stopwatch = Stopwatch.StartNew();
            try
            {
                // Validate input
                if (string.IsNullOrEmpty(invoiceNumber))
                {
                    _logger.LogWarning("Invoice generation attempted without invoice number");
                    return BadRequest("Invoice number is required");
                }
                // Generate sample data (in production, fetch from database)
                var invoice = CreateSampleInvoice(invoiceNumber);
                // Log the generation attempt
                _logger.LogInformation($"Generating PDF for invoice {invoiceNumber}");
                // Configure PDF rendering options
                _pdfRenderer.RenderingOptions.PaperOrientation = IronPdf.Rendering.PdfPaperOrientation.Portrait;
                _pdfRenderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4;
                _pdfRenderer.RenderingOptions.PrintHtmlBackgrounds = true;
                _pdfRenderer.RenderingOptions.CreatePdfFormsFromHtml = false;
                // Add custom header with page numbers
                _pdfRenderer.RenderingOptions.TextHeader = new TextHeaderFooter
                {
                    CenterText = $"Invoice {invoice.InvoiceNumber}",
                    DrawDividerLine = true,
                    Font = IronSoftware.Drawing.FontTypes.Helvetica,
                    FontSize = 10
                };
                // Add footer with page numbers
                _pdfRenderer.RenderingOptions.TextFooter = new TextHeaderFooter
                {
                    LeftText = "{date} {time}",
                    RightText = "Page {page} of {total-pages}",
                    DrawDividerLine = true,
                    Font = IronSoftware.Drawing.FontTypes.Helvetica,
                    FontSize = 8
                };
                // Render the view to PDF
                PdfDocument pdf;
                try
                {
                    pdf = _pdfRenderer.RenderRazorViewToPdf(
                        _viewRenderer,
                        "Views/Invoice/InvoiceTemplate.cshtml",
                        invoice);
                }
                catch (例外 renderEx)
                {
                    _logger.LogError(renderEx, "Failed to render Razor view to PDF");
                    throw new InvalidOperation例外("PDF rendering failed. Please check the template.", renderEx);
                }
                // Apply metadata
                pdf.MetaData.Author = "PdfGeneratorApp";
                pdf.MetaData.Title = $"Invoice {invoice.InvoiceNumber}";
                pdf.MetaData.Subject = $"Invoice for {invoice.Customer.Name}";
                pdf.MetaData.Keywords = "invoice, billing, payment";
                pdf.MetaData.CreationDate = DateTime.UtcNow;
                pdf.MetaData.ModifiedDate = DateTime.UtcNow;
                // Optional: Add password protection
                // pdf.SecuritySettings.UserPassword = "user123";
                // pdf.SecuritySettings.OwnerPassword = "owner456";
                // pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;
                // Log performance metrics
                stopwatch.Stop();
                _logger.LogInformation($"PDF generated successfully for invoice {invoiceNumber} in {stopwatch.ElapsedMilliseconds}ms");
                // Return the PDF file
                Response.Headers.Add("Content-Disposition", $"inline; filename=Invoice_{invoiceNumber}.pdf");
                return File(pdf.BinaryData, "application/pdf", $"Invoice_{invoiceNumber}.pdf");
            }
            catch (例外 ex)
            {
                _logger.LogError(ex, $"Error generating PDF for invoice {invoiceNumber}");
                // In development, return detailed error
                if (_environment.IsDevelopment())
                {
                    return StatusCode(500, new
                    {
                        error = "PDF generation failed",
                        message = ex.Message,
                        stackTrace = ex.StackTrace
                    });
                }
                // In production, return generic error
                return StatusCode(500, "An error occurred while generating the PDF");
            }
        }
        private InvoiceModel CreateSampleInvoice(string invoiceNumber)
        {
            return new InvoiceModel
            {
                InvoiceNumber = invoiceNumber,
                InvoiceDate = DateTime.Now,
                DueDate = DateTime.Now.AddDays(30),
                Vendor = new CompanyInfo
                {
                    Name = "Tech 解決方案s Inc.",
                    Address = "123 Business Ave",
                    City = "New York",
                    State = "NY",
                    ZipCode = "10001",
                    Email = "billing@techsolutions.com",
                    Phone = "(555) 123-4567"
                },
                Customer = new CompanyInfo
                {
                    Name = "Acme Corporation",
                    Address = "456 Commerce St",
                    City = "Los Angeles",
                    State = "CA",
                    ZipCode = "90001",
                    Email = "accounts@acmecorp.com",
                    Phone = "(555) 987-6543"
                },
                Items = new List<InvoiceItem>
                {
                    new InvoiceItem
                    {
                        Description = "Software Development Services - 40 hours",
                        Quantity = 40,
                        UnitPrice = 150.00m
                    },
                    new InvoiceItem
                    {
                        Description = "Project Management - 10 hours",
                        Quantity = 10,
                        UnitPrice = 120.00m
                    },
                    new InvoiceItem
                    {
                        Description = "Quality Assurance Testing",
                        Quantity = 1,
                        UnitPrice = 2500.00m
                    }
                },
                TaxRate = 8.875m,
                Notes = "Payment is due within 30 days. Late payments subject to 1.5% monthly interest.",
                PaymentTerms = "Net 30"
            };
        }
    }
}

程式碼說明

程式碼說明

實際醫療報告範例

這是生成符合HIPAA標準的醫療報告的具體實現：

public class MedicalReportGenerator
{
    private readonly ChromePdfRenderer _renderer;
    private readonly ILogger<MedicalReportGenerator> _logger;
    public MedicalReportGenerator(
        ChromePdfRenderer renderer,
        ILogger<MedicalReportGenerator> logger)
    {
        _renderer = renderer;
        _logger = logger;
    }
    public async Task<PdfDocument> GeneratePatientReport(PatientReportModel model)
    {
        var stopwatch = Stopwatch.StartNew();
        // Configure for medical document standards
        _renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.Letter;
        _renderer.RenderingOptions.MarginTop = 50;
        _renderer.RenderingOptions.MarginBottom = 40;
        // HIPAA-compliant header
        _renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter
        {
            Height = 45,
            HtmlFragment = $@"
                <div style='width: 100%; font-size: 10px;'>
                    <div style='float: left;'>
                        <strong>CONFIDENTIAL MEDICAL RECORD</strong><br/>
                        Patient: {model.PatientName} | MRN: {model.MedicalRecordNumber}
                    </div>
                    <div style='float: right; text-align: right;'>
                        Generated: {{date}} {{time}}<br/>
                        Provider: {model.ProviderName}
                    </div>
                </div>"
        };
        // Generate report HTML
        var html = GenerateMedicalReportHtml(model);
        // Create PDF with encryption for HIPAA compliance
        var pdf = _renderer.RenderHtmlAsPdf(html);
        // Apply 256-bit AES encryption
        pdf.SecuritySettings.UserPassword = GenerateSecurePassword();
        pdf.SecuritySettings.OwnerPassword = GenerateOwnerPassword();
        pdf.SecuritySettings.AllowUserCopyPasteContent = false;
        pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint;
        pdf.SecuritySettings.AllowUserFormData = false;
        pdf.SecuritySettings.AllowUserAnnotations = false;
        // Add audit metadata
        pdf.MetaData.Author = model.ProviderName;
        pdf.MetaData.Title = $"Medical Report - {model.PatientName}";
        pdf.MetaData.Keywords = "medical,confidential,hipaa";
        pdf.MetaData.CustomProperties.Add("ReportType", model.ReportType);
        pdf.MetaData.CustomProperties.Add("GeneratedBy", model.UserId);
        pdf.MetaData.CustomProperties.Add("Timestamp", DateTime.UtcNow.ToString("O"));
        stopwatch.Stop();
        _logger.LogInformation($"Medical report generated in {stopwatch.ElapsedMilliseconds}ms for patient {model.MedicalRecordNumber}");
        return pdf;
    }
    private string GenerateMedicalReportHtml(PatientReportModel model)
    {
        // Generate comprehensive medical report HTML
        // This would typically use a Razor view in production
        return $@"
            <!DOCTYPE html>
            <html>
            <head>
                <style>
                    body {{ font-family: 'Segoe UI', Arial, sans-serif; margin: 0; padding: 20px; }}
                    .header {{ background: #f0f4f8; padding: 20px; margin-bottom: 30px; }}
                    .patient-info {{ display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 30px; }}
                    .section {{ margin-bottom: 30px; }}
                    .section h2 {{ color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; }}
                    .vital-signs {{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }}
                    .vital-box {{ background: #ecf0f1; padding: 15px; border-radius: 5px; }}
                    .medication-table {{ width: 100%; border-collapse: collapse; }}
                    .medication-table th, .medication-table td {{ border: 1px solid #ddd; padding: 10px; text-align: left; }}
                    .medication-table th {{ background: #3498db; color: white; }}
                    .alert {{ background: #e74c3c; color: white; padding: 10px; border-radius: 5px; margin-bottom: 20px; }}
                </style>
            </head>
            <body>
                <div class='header'>
                    <h1>Patient Medical Report</h1>
                    <p>Report Date: {DateTime.Now:MMMM dd, yyyy}</p>
                </div>
                {(model.HasAllergies ? "<div class='alert'>⚠ PATIENT HAS KNOWN ALLERGIES - SEE ALLERGY SECTION</div>" : "")}
                <div class='patient-info'>
                    <div>
                        <strong>Patient Name:</strong> {model.PatientName}<br/>
                        <strong>Date of Birth:</strong> {model.DateOfBirth:MM/dd/yyyy}<br/>
                        <strong>Age:</strong> {model.Age} years<br/>
                        <strong>Gender:</strong> {model.Gender}
                    </div>
                    <div>
                        <strong>MRN:</strong> {model.MedicalRecordNumber}<br/>
                        <strong>Admission Date:</strong> {model.AdmissionDate:MM/dd/yyyy}<br/>
                        <strong>Provider:</strong> {model.ProviderName}<br/>
                        <strong>Department:</strong> {model.Department}
                    </div>
                </div>
                <div class='section'>
                    <h2>Vital Signs</h2>
                    <div class='vital-signs'>
                        <div class='vital-box'>
                            <strong>Blood Pressure</strong><br/>
                            {model.BloodPressure}
                        </div>
                        <div class='vital-box'>
                            <strong>Heart Rate</strong><br/>
                            {model.HeartRate} bpm
                        </div>
                        <div class='vital-box'>
                            <strong>Temperature</strong><br/>
                            {model.Temperature}°F
                        </div>
                        <div class='vital-box'>
                            <strong>Respiratory Rate</strong><br/>
                            {model.RespiratoryRate} /min
                        </div>
                        <div class='vital-box'>
                            <strong>O2 Saturation</strong><br/>
                            {model.OxygenSaturation}%
                        </div>
                        <div class='vital-box'>
                            <strong>Weight</strong><br/>
                            {model.Weight} lbs
                        </div>
                    </div>
                </div>
                <div class='section'>
                    <h2>Current Medications</h2>
                    <table class='medication-table'>
                        <thead>
                            <tr>
                                <th>Medication</th>
                                <th>Dosage</th>
                                <th>Frequency</th>
                                <th>Route</th>
                                <th>Start Date</th>
                            </tr>
                        </thead>
                        <tbody>
                            {string.Join("", model.Medications.Select(m => $@"
                                <tr>
                                    <td>{m.Name}</td>
                                    <td>{m.Dosage}</td>
                                    <td>{m.Frequency}</td>
                                    <td>{m.Route}</td>
                                    <td>{m.StartDate:MM/dd/yyyy}</td>
                                </tr>
                            "))}
                        </tbody>
                    </table>
                </div>
                <div class='section'>
                    <h2>Clinical Notes</h2>
                    <p>{model.ClinicalNotes}</p>
                </div>
                <div class='section'>
                    <h2>Treatment Plan</h2>
                    <p>{model.TreatmentPlan}</p>
                </div>
            </body>
            </html>";
    }
    private string GenerateSecurePassword()
    {
        // Generate cryptographically secure password
        using var rng = System.Security.Cryptography.RandomNumberGenerator.Create();
        var bytes = new byte[32];
        rng.GetBytes(bytes);
        return Convert.ToBase64String(bytes);
    }
    private string GenerateOwnerPassword()
    {
        // In production, retrieve from secure configuration
        return "SecureOwnerPassword123!";
    }
}
public class PatientReportModel
{
    public string PatientName { get; set; }
    public string MedicalRecordNumber { get; set; }
    public DateTime DateOfBirth { get; set; }
    public int Age { get; set; }
    public string Gender { get; set; }
    public DateTime AdmissionDate { get; set; }
    public string ProviderName { get; set; }
    public string Department { get; set; }
    public string ReportType { get; set; }
    public string UserId { get; set; }
    // Vital Signs
    public string BloodPressure { get; set; }
    public int HeartRate { get; set; }
    public decimal Temperature { get; set; }
    public int RespiratoryRate { get; set; }
    public int OxygenSaturation { get; set; }
    public decimal Weight { get; set; }
    // Medical Information
    public bool HasAllergies { get; set; }
    public List<Medication> Medications { get; set; }
    public string ClinicalNotes { get; set; }
    public string TreatmentPlan { get; set; }
}
public class Medication
{
    public string Name { get; set; }
    public string Dosage { get; set; }
    public string Frequency { get; set; }
    public string Route { get; set; }
    public DateTime StartDate { get; set; }
}

public class MedicalReportGenerator
{
    private readonly ChromePdfRenderer _renderer;
    private readonly ILogger<MedicalReportGenerator> _logger;
    public MedicalReportGenerator(
        ChromePdfRenderer renderer,
        ILogger<MedicalReportGenerator> logger)
    {
        _renderer = renderer;
        _logger = logger;
    }
    public async Task<PdfDocument> GeneratePatientReport(PatientReportModel model)
    {
        var stopwatch = Stopwatch.StartNew();
        // Configure for medical document standards
        _renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.Letter;
        _renderer.RenderingOptions.MarginTop = 50;
        _renderer.RenderingOptions.MarginBottom = 40;
        // HIPAA-compliant header
        _renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter
        {
            Height = 45,
            HtmlFragment = $@"
                <div style='width: 100%; font-size: 10px;'>
                    <div style='float: left;'>
                        <strong>CONFIDENTIAL MEDICAL RECORD</strong><br/>
                        Patient: {model.PatientName} | MRN: {model.MedicalRecordNumber}
                    </div>
                    <div style='float: right; text-align: right;'>
                        Generated: {{date}} {{time}}<br/>
                        Provider: {model.ProviderName}
                    </div>
                </div>"
        };
        // Generate report HTML
        var html = GenerateMedicalReportHtml(model);
        // Create PDF with encryption for HIPAA compliance
        var pdf = _renderer.RenderHtmlAsPdf(html);
        // Apply 256-bit AES encryption
        pdf.SecuritySettings.UserPassword = GenerateSecurePassword();
        pdf.SecuritySettings.OwnerPassword = GenerateOwnerPassword();
        pdf.SecuritySettings.AllowUserCopyPasteContent = false;
        pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint;
        pdf.SecuritySettings.AllowUserFormData = false;
        pdf.SecuritySettings.AllowUserAnnotations = false;
        // Add audit metadata
        pdf.MetaData.Author = model.ProviderName;
        pdf.MetaData.Title = $"Medical Report - {model.PatientName}";
        pdf.MetaData.Keywords = "medical,confidential,hipaa";
        pdf.MetaData.CustomProperties.Add("ReportType", model.ReportType);
        pdf.MetaData.CustomProperties.Add("GeneratedBy", model.UserId);
        pdf.MetaData.CustomProperties.Add("Timestamp", DateTime.UtcNow.ToString("O"));
        stopwatch.Stop();
        _logger.LogInformation($"Medical report generated in {stopwatch.ElapsedMilliseconds}ms for patient {model.MedicalRecordNumber}");
        return pdf;
    }
    private string GenerateMedicalReportHtml(PatientReportModel model)
    {
        // Generate comprehensive medical report HTML
        // This would typically use a Razor view in production
        return $@"
            <!DOCTYPE html>
            <html>
            <head>
                <style>
                    body {{ font-family: 'Segoe UI', Arial, sans-serif; margin: 0; padding: 20px; }}
                    .header {{ background: #f0f4f8; padding: 20px; margin-bottom: 30px; }}
                    .patient-info {{ display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 30px; }}
                    .section {{ margin-bottom: 30px; }}
                    .section h2 {{ color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; }}
                    .vital-signs {{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }}
                    .vital-box {{ background: #ecf0f1; padding: 15px; border-radius: 5px; }}
                    .medication-table {{ width: 100%; border-collapse: collapse; }}
                    .medication-table th, .medication-table td {{ border: 1px solid #ddd; padding: 10px; text-align: left; }}
                    .medication-table th {{ background: #3498db; color: white; }}
                    .alert {{ background: #e74c3c; color: white; padding: 10px; border-radius: 5px; margin-bottom: 20px; }}
                </style>
            </head>
            <body>
                <div class='header'>
                    <h1>Patient Medical Report</h1>
                    <p>Report Date: {DateTime.Now:MMMM dd, yyyy}</p>
                </div>
                {(model.HasAllergies ? "<div class='alert'>⚠ PATIENT HAS KNOWN ALLERGIES - SEE ALLERGY SECTION</div>" : "")}
                <div class='patient-info'>
                    <div>
                        <strong>Patient Name:</strong> {model.PatientName}<br/>
                        <strong>Date of Birth:</strong> {model.DateOfBirth:MM/dd/yyyy}<br/>
                        <strong>Age:</strong> {model.Age} years<br/>
                        <strong>Gender:</strong> {model.Gender}
                    </div>
                    <div>
                        <strong>MRN:</strong> {model.MedicalRecordNumber}<br/>
                        <strong>Admission Date:</strong> {model.AdmissionDate:MM/dd/yyyy}<br/>
                        <strong>Provider:</strong> {model.ProviderName}<br/>
                        <strong>Department:</strong> {model.Department}
                    </div>
                </div>
                <div class='section'>
                    <h2>Vital Signs</h2>
                    <div class='vital-signs'>
                        <div class='vital-box'>
                            <strong>Blood Pressure</strong><br/>
                            {model.BloodPressure}
                        </div>
                        <div class='vital-box'>
                            <strong>Heart Rate</strong><br/>
                            {model.HeartRate} bpm
                        </div>
                        <div class='vital-box'>
                            <strong>Temperature</strong><br/>
                            {model.Temperature}°F
                        </div>
                        <div class='vital-box'>
                            <strong>Respiratory Rate</strong><br/>
                            {model.RespiratoryRate} /min
                        </div>
                        <div class='vital-box'>
                            <strong>O2 Saturation</strong><br/>
                            {model.OxygenSaturation}%
                        </div>
                        <div class='vital-box'>
                            <strong>Weight</strong><br/>
                            {model.Weight} lbs
                        </div>
                    </div>
                </div>
                <div class='section'>
                    <h2>Current Medications</h2>
                    <table class='medication-table'>
                        <thead>
                            <tr>
                                <th>Medication</th>
                                <th>Dosage</th>
                                <th>Frequency</th>
                                <th>Route</th>
                                <th>Start Date</th>
                            </tr>
                        </thead>
                        <tbody>
                            {string.Join("", model.Medications.Select(m => $@"
                                <tr>
                                    <td>{m.Name}</td>
                                    <td>{m.Dosage}</td>
                                    <td>{m.Frequency}</td>
                                    <td>{m.Route}</td>
                                    <td>{m.StartDate:MM/dd/yyyy}</td>
                                </tr>
                            "))}
                        </tbody>
                    </table>
                </div>
                <div class='section'>
                    <h2>Clinical Notes</h2>
                    <p>{model.ClinicalNotes}</p>
                </div>
                <div class='section'>
                    <h2>Treatment Plan</h2>
                    <p>{model.TreatmentPlan}</p>
                </div>
            </body>
            </html>";
    }
    private string GenerateSecurePassword()
    {
        // Generate cryptographically secure password
        using var rng = System.Security.Cryptography.RandomNumberGenerator.Create();
        var bytes = new byte[32];
        rng.GetBytes(bytes);
        return Convert.ToBase64String(bytes);
    }
    private string GenerateOwnerPassword()
    {
        // In production, retrieve from secure configuration
        return "SecureOwnerPassword123!";
    }
}
public class PatientReportModel
{
    public string PatientName { get; set; }
    public string MedicalRecordNumber { get; set; }
    public DateTime DateOfBirth { get; set; }
    public int Age { get; set; }
    public string Gender { get; set; }
    public DateTime AdmissionDate { get; set; }
    public string ProviderName { get; set; }
    public string Department { get; set; }
    public string ReportType { get; set; }
    public string UserId { get; set; }
    // Vital Signs
    public string BloodPressure { get; set; }
    public int HeartRate { get; set; }
    public decimal Temperature { get; set; }
    public int RespiratoryRate { get; set; }
    public int OxygenSaturation { get; set; }
    public decimal Weight { get; set; }
    // Medical Information
    public bool HasAllergies { get; set; }
    public List<Medication> Medications { get; set; }
    public string ClinicalNotes { get; set; }
    public string TreatmentPlan { get; set; }
}
public class Medication
{
    public string Name { get; set; }
    public string Dosage { get; set; }
    public string Frequency { get; set; }
    public string Route { get; set; }
    public DateTime StartDate { get; set; }
}

應用安全設置

using System.Text.RegularExpressions;
namespace PdfGeneratorApp.Utilities
{
    public static class PdfSecurityHelper
    {
        public static void ApplySecuritySettings(PdfDocument pdf, SecurityLevel level)
        {
            switch (level)
            {
                case SecurityLevel.Low:
                    // Basic protection
                    pdf.SecuritySettings.AllowUserCopyPasteContent = true;
                    pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;
                    break;
                case SecurityLevel.Medium:
                    // Restricted copying
                    pdf.SecuritySettings.UserPassword = GeneratePassword(8);
                    pdf.SecuritySettings.AllowUserCopyPasteContent = false;
                    pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.PrintLowQuality;
                    break;
                case SecurityLevel.High:
                    // Maximum security
                    pdf.SecuritySettings.UserPassword = GeneratePassword(16);
                    pdf.SecuritySettings.OwnerPassword = GeneratePassword(16);
                    pdf.SecuritySettings.AllowUserCopyPasteContent = false;
                    pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint;
                    pdf.SecuritySettings.AllowUserAnnotations = false;
                    pdf.SecuritySettings.AllowUserFormData = false;
                    break;
            }
        }
    public enum SecurityLevel
    {
        Low,
        Medium,
        High
    }
}

using System.Text.RegularExpressions;
namespace PdfGeneratorApp.Utilities
{
    public static class PdfSecurityHelper
    {
        public static void ApplySecuritySettings(PdfDocument pdf, SecurityLevel level)
        {
            switch (level)
            {
                case SecurityLevel.Low:
                    // Basic protection
                    pdf.SecuritySettings.AllowUserCopyPasteContent = true;
                    pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;
                    break;
                case SecurityLevel.Medium:
                    // Restricted copying
                    pdf.SecuritySettings.UserPassword = GeneratePassword(8);
                    pdf.SecuritySettings.AllowUserCopyPasteContent = false;
                    pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.PrintLowQuality;
                    break;
                case SecurityLevel.High:
                    // Maximum security
                    pdf.SecuritySettings.UserPassword = GeneratePassword(16);
                    pdf.SecuritySettings.OwnerPassword = GeneratePassword(16);
                    pdf.SecuritySettings.AllowUserCopyPasteContent = false;
                    pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint;
                    pdf.SecuritySettings.AllowUserAnnotations = false;
                    pdf.SecuritySettings.AllowUserFormData = false;
                    break;
            }
        }
    public enum SecurityLevel
    {
        Low,
        Medium,
        High
    }
}

在上面的輔助類別中，我們使用SecurityLevel列舉來設定PDF的不同安全選項。 例如，低 SecurityLevel 提供基本保護，但仍允許 FullPrintRights 以及通過將屬性 AllowUserCopyPasteContent 設為 true 來進行 PDF 複製和粘貼。 這些設定可以透過調整IronPDF的PDF類屬性來啟用。 如需完整的安全性屬性和選項列表，請參考操作指南。

記憶體管理

有關處理IronPDF中的記憶體洩漏的詳細指導，請實施以下模式：

public class PdfMemoryManager : IDisposable
{
    private readonly List<PdfDocument> _openDocuments = new();
    private readonly ILogger<PdfMemoryManager> _logger;
    private bool _disposed;
    public PdfMemoryManager(ILogger<PdfMemoryManager> logger)
    {
        _logger = logger;
    }
    public PdfDocument CreateDocument(ChromePdfRenderer renderer, string html)
    {
        try
        {
            var pdf = renderer.RenderHtmlAsPdf(html);
            _openDocuments.Add(pdf);
            return pdf;
        }
        catch (OutOfMemory例外 ex)
        {
            _logger.LogError(ex, "Out of memory while generating PDF");
            // Force garbage collection
            CleanupMemory();
            // Retry with reduced quality
            renderer.RenderingOptions.JpegQuality = 50;
            var pdf = renderer.RenderHtmlAsPdf(html);
            _openDocuments.Add(pdf);
            return pdf;
        }
    }
    private void CleanupMemory()
    {
        // Dispose all open documents
        foreach (var doc in _openDocuments)
        {
            doc?.Dispose();
        }
        _openDocuments.Clear();
        // Force garbage collection
        GC.Collect();
        GC.WaitForPendingFinalizers();
        GC.Collect();
        _logger.LogInformation("Memory cleanup performed");
    }
    public void Dispose()
    {
        if (!_disposed)
        {
            CleanupMemory();
            _disposed = true;
        }
    }
}

public class PdfMemoryManager : IDisposable
{
    private readonly List<PdfDocument> _openDocuments = new();
    private readonly ILogger<PdfMemoryManager> _logger;
    private bool _disposed;
    public PdfMemoryManager(ILogger<PdfMemoryManager> logger)
    {
        _logger = logger;
    }
    public PdfDocument CreateDocument(ChromePdfRenderer renderer, string html)
    {
        try
        {
            var pdf = renderer.RenderHtmlAsPdf(html);
            _openDocuments.Add(pdf);
            return pdf;
        }
        catch (OutOfMemory例外 ex)
        {
            _logger.LogError(ex, "Out of memory while generating PDF");
            // Force garbage collection
            CleanupMemory();
            // Retry with reduced quality
            renderer.RenderingOptions.JpegQuality = 50;
            var pdf = renderer.RenderHtmlAsPdf(html);
            _openDocuments.Add(pdf);
            return pdf;
        }
    }
    private void CleanupMemory()
    {
        // Dispose all open documents
        foreach (var doc in _openDocuments)
        {
            doc?.Dispose();
        }
        _openDocuments.Clear();
        // Force garbage collection
        GC.Collect();
        GC.WaitForPendingFinalizers();
        GC.Collect();
        _logger.LogInformation("Memory cleanup performed");
    }
    public void Dispose()
    {
        if (!_disposed)
        {
            CleanupMemory();
            _disposed = true;
        }
    }
}

字體渲染問題

public class FontTroubleshooter
{
    public static void EnsureFontsAvailable(ChromePdfRenderer renderer)
    {
        // Embed fonts in the PDF
        renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
        // Use web-safe fonts as fallback
        var fontFallback = @"
            <style>
                body {
                    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
                }
                @font-face {
                    font-family: 'CustomFont';
                    src: url('data:font/woff2;base64,YOUR_BASE64_FONT_HERE') format('woff2');
                }
            </style>";
        // Add to HTML head
        renderer.RenderingOptions.CustomCssUrl = "https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap";
    }
}

public class FontTroubleshooter
{
    public static void EnsureFontsAvailable(ChromePdfRenderer renderer)
    {
        // Embed fonts in the PDF
        renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
        // Use web-safe fonts as fallback
        var fontFallback = @"
            <style>
                body {
                    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
                }
                @font-face {
                    font-family: 'CustomFont';
                    src: url('data:font/woff2;base64,YOUR_BASE64_FONT_HERE') format('woff2');
                }
            </style>";
        // Add to HTML head
        renderer.RenderingOptions.CustomCssUrl = "https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap";
    }
}

常見例外及解決方案

調試技巧

使用IronPDF，您可以輕鬆地除錯及記錄應用程式運行的所有過程，以便搜尋和驗證任何輸入和輸出。 若要啟用日誌記錄，請將 EnableDebugging\ 設定為 true，並透過指定 LogFilePath 屬性的值來指定日誌檔案路徑。 這裡有一個快速的程式碼片段顯示如何做到這一點。

public class PdfDebugger
{
    private readonly ILogger<PdfDebugger> _logger;
    public PdfDebugger(ILogger<PdfDebugger> logger)
    {
        _logger = logger;
    }
    public void EnableDebugging(ChromePdfRenderer renderer)
    {
        // Enable detailed logging
        IronPdf.Logging.Logger.EnableDebugging = true;
        IronPdf.Logging.Logger.LogFilePath = "IronPdf.log";
        IronPdf.Logging.Logger.LoggingMode = IronPdf.Logging.Logger.LoggingModes.All;
        // Log rendering settings
        _logger.LogDebug($"Paper Size: {renderer.RenderingOptions.PaperSize}");
        _logger.LogDebug($"Margins: T{renderer.RenderingOptions.MarginTop} " +
                         $"B{renderer.RenderingOptions.MarginBottom} " +
                         $"L{renderer.RenderingOptions.MarginLeft} " +
                         $"R{renderer.RenderingOptions.MarginRight}");
        _logger.LogDebug($"JavaScript Enabled: {renderer.RenderingOptions.EnableJavaScript}");
        _logger.LogDebug($"Render Delay: {renderer.RenderingOptions.RenderDelay}ms");
    }
    public void SaveDebugHtml(string html, string fileName)
    {
        // Save HTML for inspection
        var debugPath = Path.Combine("debug", $"{fileName}_{DateTime.Now:yyyyMMdd_HHmmss}.html");
        Directory.CreateDirectory("debug");
        File.WriteAllText(debugPath, html);
        _logger.LogDebug($"Debug HTML saved to: {debugPath}");
    }
}

public class PdfDebugger
{
    private readonly ILogger<PdfDebugger> _logger;
    public PdfDebugger(ILogger<PdfDebugger> logger)
    {
        _logger = logger;
    }
    public void EnableDebugging(ChromePdfRenderer renderer)
    {
        // Enable detailed logging
        IronPdf.Logging.Logger.EnableDebugging = true;
        IronPdf.Logging.Logger.LogFilePath = "IronPdf.log";
        IronPdf.Logging.Logger.LoggingMode = IronPdf.Logging.Logger.LoggingModes.All;
        // Log rendering settings
        _logger.LogDebug($"Paper Size: {renderer.RenderingOptions.PaperSize}");
        _logger.LogDebug($"Margins: T{renderer.RenderingOptions.MarginTop} " +
                         $"B{renderer.RenderingOptions.MarginBottom} " +
                         $"L{renderer.RenderingOptions.MarginLeft} " +
                         $"R{renderer.RenderingOptions.MarginRight}");
        _logger.LogDebug($"JavaScript Enabled: {renderer.RenderingOptions.EnableJavaScript}");
        _logger.LogDebug($"Render Delay: {renderer.RenderingOptions.RenderDelay}ms");
    }
    public void SaveDebugHtml(string html, string fileName)
    {
        // Save HTML for inspection
        var debugPath = Path.Combine("debug", $"{fileName}_{DateTime.Now:yyyyMMdd_HHmmss}.html");
        Directory.CreateDirectory("debug");
        File.WriteAllText(debugPath, html);
        _logger.LogDebug($"Debug HTML saved to: {debugPath}");
    }
}

IIS配置

對於部署到 IIS，請確保正確配置：

<configuration>
  <system.webServer>

    <applicationPool>
      <processModel enable32BitAppOnWin64="false" />
    </applicationPool>

    <httpRuntime executionTimeout="300" maxRequestLength="51200" />

    <system.web>
      <compilation tempDirectory="~/App_Data/Temp/" />
    </system.web>
  </system.webServer>
</configuration>

<configuration>
  <system.webServer>

    <applicationPool>
      <processModel enable32BitAppOnWin64="false" />
    </applicationPool>

    <httpRuntime executionTimeout="300" maxRequestLength="51200" />

    <system.web>
      <compilation tempDirectory="~/App_Data/Temp/" />
    </system.web>
  </system.webServer>
</configuration>

必要的相依性

請確保這些元件已安裝在您的部署伺服器上：

1. .NET Runtime - 版本6.0或更高
2. Visual C++ Redistributables - 2015-2022 (x64)
3. Windows Server - 建議使用2012 R2或更高版本

檔案系統權限

# Grant IIS_IUSRS write access to temp folder
icacls "C:\inetpub\wwwroot\YourApp\App_Data\Temp" /grant "IIS_IUSRS:(OI)(CI)M" /T
# Grant access to IronPDF cache folder
icacls "C:\Windows\Temp\IronPdf" /grant "IIS_IUSRS:(OI)(CI)M" /T

# Grant IIS_IUSRS write access to temp folder
icacls "C:\inetpub\wwwroot\YourApp\App_Data\Temp" /grant "IIS_IUSRS:(OI)(CI)M" /T
# Grant access to IronPDF cache folder
icacls "C:\Windows\Temp\IronPdf" /grant "IIS_IUSRS:(OI)(CI)M" /T

效能調整

// Startup.cs or Program.cs
public void ConfigureServices(IServiceCollection services)
{
    // Configure IronPDF for production
    services.AddSingleton<ChromePdfRenderer>(provider =>
    {
        var renderer = new ChromePdfRenderer();
        // Production optimizations
        renderer.RenderingOptions.RenderDelay = 50; // Minimize delay
        renderer.RenderingOptions.Timeout = 120; // 2 minutes max
        renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
        // Enable caching for static resources
        Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled;
        Installation.LinuxAndDockerDependenciesAutoConfig = false;
        return renderer;
    });
    // Configure memory cache for generated PDFs
    services.AddMemoryCache(options =>
    {
        options.SizeLimit = 100_000_000; // 100 MB cache
    });
}

// Startup.cs or Program.cs
public void ConfigureServices(IServiceCollection services)
{
    // Configure IronPDF for production
    services.AddSingleton<ChromePdfRenderer>(provider =>
    {
        var renderer = new ChromePdfRenderer();
        // Production optimizations
        renderer.RenderingOptions.RenderDelay = 50; // Minimize delay
        renderer.RenderingOptions.Timeout = 120; // 2 minutes max
        renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;
        // Enable caching for static resources
        Installation.ChromeGpuMode = IronPdf.Engines.Chrome.ChromeGpuModes.Disabled;
        Installation.LinuxAndDockerDependenciesAutoConfig = false;
        return renderer;
    });
    // Configure memory cache for generated PDFs
    services.AddMemoryCache(options =>
    {
        options.SizeLimit = 100_000_000; // 100 MB cache
    });
}

現在開始構建專業的PDF

現在開始使用 IronPDF。

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