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Agentic batch 20260330_052503 #183

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130 changes: 130 additions & 0 deletions ...ail-template-and-send-it-to-multiple-receivers-dynamically-fetched-from-an-excel-sheet.cs
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using System;
using System.IO;
using System.Collections.Generic;
using Aspose.Email;
using Aspose.Email.Clients.Smtp;

class Program
{
static void Main()
{
try
{
// Paths for the template and the recipients list
const string recipientsPath = "recipients.csv";

// Ensure the recipients file exists; create a minimal placeholder if missing
try
{
if (!File.Exists(recipientsPath))
{
var placeholderLines = new[]
{
"john.doe@example.com",
"jane.smith@example.com"
};
File.WriteAllLines(recipientsPath, placeholderLines);
}
}
catch (Exception ex)
{
Console.Error.WriteLine($"Failed to prepare recipients file: {ex.Message}");
return;
}

// Read recipient email addresses from the CSV file
List<string> recipientEmails = new List<string>();
try
{
using (StreamReader reader = new StreamReader(recipientsPath))
{
string line;
while ((line = reader.ReadLine()) != null)
{
string email = line.Trim();
if (!string.IsNullOrEmpty(email))
{
recipientEmails.Add(email);
}
}
}
}
catch (Exception ex)
{
Console.Error.WriteLine($"Failed to read recipients: {ex.Message}");
return;
}

if (recipientEmails.Count == 0)
{
Console.Error.WriteLine("No recipient addresses found.");
return;
}

// Create a fancy HTML email template
const string htmlTemplate = @"
<html>
<head>
<style>
.header { background:#4CAF50;color:white;padding:10px;text-align:center; }
.content { margin:20px;font-family:Arial,sans-serif; }
.footer { background:#f1f1f1;color:#555;padding:10px;text-align:center;font-size:12px; }
</style>
</head>
<body>
<div class='header'><h1>Welcome to Our Newsletter</h1></div>
<div class='content'>
<p>Dear {{Name}},</p>
<p>We are excited to bring you the latest updates.</p>
<p>Best regards,<br/>The Team</p>
</div>
<div class='footer'>© 2026 Company Inc.</div>
</body>
</html>";

// Build the MailMessage (using a generic placeholder name for the sender)
MailMessage message = new MailMessage();
message.From = new MailAddress("sender@example.com", "Sender Name");
message.Subject = "Your Monthly Update";
message.HtmlBody = htmlTemplate;

// Add all recipients to the To collection
foreach (string email in recipientEmails)
{
message.To.Add(new MailAddress(email));
}

// Prepare SMTP client (placeholder credentials)
const string smtpHost = "smtp.example.com";
const int smtpPort = 587;
const string smtpUser = "username";
const string smtpPass = "password";

// Guard against executing real network calls with placeholder data
if (smtpHost.Contains("example.com"))
{
Console.WriteLine("Placeholder SMTP settings detected. Skipping actual send.");
return;
}

// Send the email
try
{
using (SmtpClient client = new SmtpClient(smtpHost, smtpPort, smtpUser, smtpPass))
{
client.Send(message);
}
Console.WriteLine("Email sent successfully to all recipients.");
}
catch (Exception ex)
{
Console.Error.WriteLine($"Failed to send email: {ex.Message}");
return;
}
}
catch (Exception ex)
{
Console.Error.WriteLine($"Unexpected error: {ex.Message}");
}
}
}
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