How to create a service for daily news letters in C#?

Question

Utpal Vishwas · Answer

Creating a service for sending daily newsletters in C# typically involves several key components:
Overview of Steps
Create a model for the newsletter contentFetch or generate the newsletter content (e.g., from a database or RSS feed)Create an email templateSend the newsletter using SMTPSchedule the task to run daily(Optional) Log sent emails and handle failures
1. Define the Newsletter Model
public class Newsletter
{
    public string Subject { get; set; }
    public string BodyHtml { get; set; }
    public DateTime Date { get; set; }
}
2. Fetch or Generate Content
You might fetch latest articles, blog posts, etc., from a database or an API.
public class NewsletterService
{
    public Newsletter GenerateDailyNewsletter()
    {
        var latestArticles = GetLatestArticles(); // Implement this
        var html = new StringBuilder();
        html.Append("andlt;h1andgt;Today's Newsandlt;/h1andgt;");
        foreach (var article in latestArticles)
        {
            html.Append($"andlt;h3andgt;{article.Title}andlt;/h3andgt;andlt;pandgt;{article.Summary}andlt;/pandgt;andlt;hrandgt;");
        }
        return new Newsletter
        {
            Subject = "Your Daily Newsletter",
            BodyHtml = html.ToString(),
            Date = DateTime.UtcNow
        };
    }
    private Listandlt;Articleandgt; GetLatestArticles()
    {
        // Replace with your logic to fetch articles
        return new Listandlt;Articleandgt;
        {
            new Article { Title = "Article 1", Summary = "Summary 1" },
            new Article { Title = "Article 2", Summary = "Summary 2" }
        };
    }
    public class Article
    {
        public string Title { get; set; }
        public string Summary { get; set; }
    }
}
3. Send Email via SMTP
public class EmailService
{
    public void SendEmail(string toEmail, string subject, string bodyHtml)
    {
        var mail = new MailMessage();
        mail.From = new MailAddress("your@email.com");
        mail.To.Add(toEmail);
        mail.Subject = subject;
        mail.Body = bodyHtml;
        mail.IsBodyHtml = true;
        using (var smtp = new SmtpClient("smtp.yourprovider.com", 587))
        {
            smtp.Credentials = new NetworkCredential("your@email.com", "yourpassword");
            smtp.EnableSsl = true;
            smtp.Send(mail);
        }
    }
}
4. Schedule the Task
Use Windows Task Scheduler or a background task in ASP.NET (like Hangfire or Quartz.NET).
Option A: Hangfire (Recommended)
Install Hangfire via NuGet:
Install-Package Hangfire
Then schedule the job:
RecurringJob.AddOrUpdate(
    "daily-newsletter-job",
    () =andgt; new NewsletterOrchestrator().SendDailyNewsletterToAll(),
    Cron.Daily
);
NewsletterOrchestrator class:
public class NewsletterOrchestrator
{
    private readonly NewsletterService _newsletterService = new();
    private readonly EmailService _emailService = new();
    public void SendDailyNewsletterToAll()
    {
        var newsletter = _newsletterService.GenerateDailyNewsletter();
        var subscribers = GetSubscribers(); // Get from DB
        foreach (var subscriber in subscribers)
        {
            _emailService.SendEmail(subscriber.Email, newsletter.Subject, newsletter.BodyHtml);
        }
    }
    private Listandlt;Subscriberandgt; GetSubscribers()
    {
        return new Listandlt;Subscriberandgt;
        {
            new Subscriber { Email = "user1@example.com" },
            new Subscriber { Email = "user2@example.com" }
        };
    }
    public class Subscriber
    {
        public string Email { get; set; }
    }
}
Optional: Logging and Error Handling
Use try-catch blocks to handle errors and log failures, possibly retrying failed attempts.
Summary
Use a service class to generate contentUse SMTP or SendGrid/MailKit to send emailsUse Hangfire or Quartz.NET for daily scheduling

forum

How to create a service for daily news letters in C#?

ICSM Computer

Can you answer this question?

1 Answers

Overview of Steps

1. Define the Newsletter Model

2. Fetch or Generate Content

3. Send Email via SMTP

4. Schedule the Task

Optional: Logging and Error Handling

Summary

Liked By