產生每月帳戶報表（PDF 文件）

using IronPdf;

var renderer = new ChromePdfRenderer();

renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4;

renderer.RenderingOptions.MarginTop = 20;

renderer.RenderingOptions.MarginBottom = 20;

foreach (var customer in activeCustomers)

{
    string html = $@"
        <h1>Account Statement — {customer.StatementPeriod}</h1>
        <p><strong>Account:</strong> {customer.AccountNumber}</p>
        <p><strong>Name:</strong> {customer.FullName}</p>
        <hr/>
        <h2>Charges This Period</h2>
        {customer.LineItemsHtml}
        <p><strong>Closing Balance:</strong> {customer.ClosingBalance:C}</p>";

    PdfDocument statement = renderer.RenderHtmlAsPdf(html);
    await DeliverStatementAsync(customer, statement);
}

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

renderer.RenderingOptions.PaperSize = IronPdf.Rendering.PdfPaperSize.A4

renderer.RenderingOptions.MarginTop = 20

renderer.RenderingOptions.MarginBottom = 20

For Each customer In activeCustomers

    Dim html As String = $"
        <h1>Account Statement — {customer.StatementPeriod}</h1>
        <p><strong>Account:</strong> {customer.AccountNumber}</p>
        <p><strong>Name:</strong> {customer.FullName}</p>
        <hr/>
        <h2>Charges This Period</h2>
        {customer.LineItemsHtml}
        <p><strong>Closing Balance:</strong> {customer.ClosingBalance:C}</p>"

    Dim statement As PdfDocument = renderer.RenderHtmlAsPdf(html)
    Await DeliverStatementAsync(customer, statement)
Next

using System.Net.Mail;
using System.IO;

async Task DeliverStatementAsync(CustomerRecord customer, PdfDocument statement)
{
    var pdfBytes = statement.BinaryData;
    // Store in blob storage for portal download
    await _blobClient.UploadAsync(
        $"statements/{customer.AccountNumber}/{customer.StatementPeriod}.pdf",
        new BinaryData(pdfBytes)
    );

    // Email to customer
    using var stream = new MemoryStream(pdfBytes);
    using var attachment = new Attachment(stream,
        $"Statement-{customer.StatementPeriod}.pdf", "application/pdf");
    var message = new MailMessage("billing@yourcompany.com", customer.Email)
    {
        Subject = $"Your {customer.StatementPeriod} Statement",
        Body = $"Dear {customer.FullName}, your statement for {customer.StatementPeriod} is attached."
    };

    message.Attachments.Add(attachment);

    using var smtp = new SmtpClient("smtp.yourprovider.com");

    await smtp.SendMailAsync(message);
}

Imports System.Net.Mail
Imports System.IO

Async Function DeliverStatementAsync( _
    customer As CustomerRecord, _
    statement As PdfDocument) As Task

    Dim pdfBytes = statement.BinaryData
    ' Store in blob storage for portal download
    Await _blobClient.UploadAsync( _
        $"statements/{customer.AccountNumber}/{customer.StatementPeriod}.pdf", _
        New BinaryData(pdfBytes) _
    )

    ' Email to customer
    Using stream As New MemoryStream(pdfBytes)
        Using attachment As New Attachment(stream, _
            $"Statement-{customer.StatementPeriod}.pdf", "application/pdf")
            Dim message As New MailMessage("billing@yourcompany.com", customer.Email) With { _
                .Subject = $"Your {customer.StatementPeriod} Statement", _
                .Body = $"Dear {customer.FullName}, your statement for {customer.StatementPeriod} is attached." _
            }

            message.Attachments.Add(attachment)

            Using smtp As New SmtpClient("smtp.yourprovider.com")
                Await smtp.SendMailAsync(message)
            End Using
        End Using
    End Using
End Function