如何在 C# 中將 PDF 轉換為字節陣列

Install-Package iTextSharp

using iTextSharp.text;
using iTextSharp.tool.xml;
using iTextSharp.text.pdf;
using System.IO;

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult GeneratePDF()
    {
        // Create a simple invoice HTML
        string invoiceHtml = @"
            <h1>Invoice #1001</h1>
            <p>Date: " + DateTime.否w.ToString("MM/dd/yyyy") + @"</p>
            <table border='1'>
                <tr><th>Item</th><th>Price</th></tr>
                <tr><td>Product A</td><td>$99.99</td></tr>
                <tr><td>Product B</td><td>$149.99</td></tr>
            </table>
            <p><strong>Total: $249.98</strong></p>";

        // Create PDF document using iTextSharp
        using var stream = new MemoryStream();
        var document = new Document(PageSize.A4);
        PdfWriter writer = PdfWriter.GetInstance(document, stream);
        document.Open();

        using (var srHtml = new StringReader(invoiceHtml))
        {
            XMLWorkerHelper.GetInstance().ParseXHtml(writer, document, srHtml);
        }

        document.Close();

        // Return the PDF file
        return new FileContentResult(stream.ToArray(), "application/pdf")
        {
            FileDownloadName = "invoice.pdf"
        };
    }
}

Imports iTextSharp.text
Imports iTextSharp.tool.xml
Imports iTextSharp.text.pdf
Imports System.IO

Public Class HomeController
    Inherits Controller

    Public Function Index() As ActionResult
        Return View()
    End Function

    Public Function GeneratePDF() As ActionResult
        ' Create a simple invoice HTML
        Dim invoiceHtml As String = "
            <h1>Invoice #1001</h1>
            <p>Date: " & DateTime.Now.ToString("MM/dd/yyyy") & "</p>
            <table border='1'>
                <tr><th>Item</th><th>Price</th></tr>
                <tr><td>Product A</td><td>$99.99</td></tr>
                <tr><td>Product B</td><td>$149.99</td></tr>
            </table>
            <p><strong>Total: $249.98</strong></p>"

        ' Create PDF document using iTextSharp
        Using stream As New MemoryStream()
            Dim document As New Document(PageSize.A4)
            Dim writer As PdfWriter = PdfWriter.GetInstance(document, stream)
            document.Open()

            Using srHtml As New StringReader(invoiceHtml)
                XMLWorkerHelper.GetInstance().ParseXHtml(writer, document, srHtml)
            End Using

            document.Close()

            ' Return the PDF file
            Return New FileContentResult(stream.ToArray(), "application/pdf") With {
                .FileDownloadName = "invoice.pdf"
            }
        End Using
    End Function
End Class

using IronPdf;

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult GenerateModernPDF()
    {
        // Create a styled invoice HTML with modern CSS
        string invoiceHtml = @"
            <style>
                body { font-family: 'Segoe UI', Arial; padding: 40px; }
                .invoice-header {
                    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                    color: white;
                    padding: 30px;
                    border-radius: 10px;
                }
                table {
                    width: 100%;
                    border-collapse: collapse;
                    margin: 20px 0;
                }
                th {
                    background-color: #f3f4f6;
                    padding: 12px;
                    text-align: left;
                }
                td {
                    padding: 12px;
                    border-bottom: 1px solid #e5e7eb;
                }
                .total {
                    font-size: 24px;
                    color: #10b981;
                    text-align: right;
                    margin-top: 20px;
                }
            </style>
            <div class='invoice-header'>
                <h1>Invoice #1001</h1>
                <p>Date: " + DateTime.否w.ToString("MMMM dd, yyyy") + @"</p>
            </div>
            <table>
                <tr><th>Item</th><th>Quantity</th><th>Price</th></tr>
                <tr><td>Premium Package</td><td>1</td><td>$99.99</td></tr>
                <tr><td>Professional Services</td><td>2</td><td>$149.99</td></tr>
            </table>
            <div class='total'>Total: $249.98</div>
            <p>Page numbers and additional content can be added to each page.</p>";

        // Use Chromium engine for rendering
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(invoiceHtml);

        // Set content disposition for download
        Response.Headers.Append("Content-Disposition", "attachment; filename=modern-invoice.pdf");

        // Return the PDF file with binary data
        return new FileContentResult(pdf.BinaryData, "application/pdf");
    }
}

Imports IronPdf

Public Class HomeController
    Inherits Controller

    Public Function Index() As ActionResult
        Return View()
    End Function

    Public Function GenerateModernPDF() As ActionResult
        ' Create a styled invoice HTML with modern CSS
        Dim invoiceHtml As String = "
            <style>
                body { font-family: 'Segoe UI', Arial; padding: 40px; }
                .invoice-header {
                    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                    color: white;
                    padding: 30px;
                    border-radius: 10px;
                }
                table {
                    width: 100%;
                    border-collapse: collapse;
                    margin: 20px 0;
                }
                th {
                    background-color: #f3f4f6;
                    padding: 12px;
                    text-align: left;
                }
                td {
                    padding: 12px;
                    border-bottom: 1px solid #e5e7eb;
                }
                .total {
                    font-size: 24px;
                    color: #10b981;
                    text-align: right;
                    margin-top: 20px;
                }
            </style>
            <div class='invoice-header'>
                <h1>Invoice #1001</h1>
                <p>Date: " & DateTime.Now.ToString("MMMM dd, yyyy") & "</p>
            </div>
            <table>
                <tr><th>Item</th><th>Quantity</th><th>Price</th></tr>
                <tr><td>Premium Package</td><td>1</td><td>$99.99</td></tr>
                <tr><td>Professional Services</td><td>2</td><td>$149.99</td></tr>
            </table>
            <div class='total'>Total: $249.98</div>
            <p>Page numbers and additional content can be added to each page.</p>"

        ' Use Chromium engine for rendering
        Dim renderer As New ChromePdfRenderer()
        Dim pdf = renderer.RenderHtmlAsPdf(invoiceHtml)

        ' Set content disposition for download
        Response.Headers.Append("Content-Disposition", "attachment; filename=modern-invoice.pdf")

        ' Return the PDF file with binary data
        Return New FileContentResult(pdf.BinaryData, "application/pdf")
    End Function
End Class

var renderer = new ChromePdfRenderer
{
    RenderingOptions = new ChromePdfRenderOptions
    {
        HtmlHeader = new HtmlHeaderFooter
        {
            MaxHeight = 25,
            HtmlFragment = "<div style='text-align: center'>Company Name</div>"
        },
        HtmlFooter = new HtmlHeaderFooter
        {
            MaxHeight = 20,
            HtmlFragment = "<center>Page {page} of {total-pages}</center>"
        }
    }
};

Dim renderer = New ChromePdfRenderer With {
    .RenderingOptions = New ChromePdfRenderOptions With {
        .HtmlHeader = New HtmlHeaderFooter With {
            .MaxHeight = 25,
            .HtmlFragment = "<div style='text-align: center'>Company Name</div>"
        },
        .HtmlFooter = New HtmlHeaderFooter With {
            .MaxHeight = 20,
            .HtmlFragment = "<center>Page {page} of {total-pages}</center>"
        }
    }
}

var pdf = renderer.RenderHtmlAsPdf(html);

// Add password protection
pdf.SecuritySettings.UserPassword = "user123";
pdf.SecuritySettings.OwnerPassword = "owner456";

// Set permissions
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;
pdf.SecuritySettings.AllowUserCopyPasteContent = false;

Dim pdf = renderer.RenderHtmlAsPdf(html)

' Add password protection
pdf.SecuritySettings.UserPassword = "user123"
pdf.SecuritySettings.OwnerPassword = "owner456"

' Set permissions
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights
pdf.SecuritySettings.AllowUserCopyPasteContent = False

string formHtml = @"
    <form>
        <label>Name:</label>
        <input type='checkbox'> Accept Terms
        <select name='country'>
            <option>USA</option>
            <option>Canada</option>
        </select>
    </form>";

var pdf = renderer.RenderHtmlAsPdf(formHtml);

Imports System

Dim formHtml As String = "
    <form>
        <label>Name:</label>
        <input type='checkbox'> Accept Terms
        <select name='country'>
            <option>USA</option>
            <option>Canada</option>
        </select>
    </form>"

Dim pdf = renderer.RenderHtmlAsPdf(formHtml)

renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print;

renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print

renderer.RenderingOptions.EnableJavaScript = true;
renderer.RenderingOptions.WaitFor.RenderDelay = 500; // milliseconds