If you really want to it as background job on a Asp.Net WebApp you should look into:
Quartz.Net
Create a job to send e-mail
public class SendMailJob : IJob
{
public void Execute(IJobExecutionContext context)
{
...Do your stuff;
}
}
Then configure your job to execute daily
// define the job and tie it to our SendMailJob class
IJobDetail job = JobBuilder.Create<SendMailJob>()
.WithIdentity("job1", "group1")
.Build();
// Trigger the job to run now, and then repeat every 24 hours
ITrigger trigger = TriggerBuilder.Create()
.WithIdentity("trigger1", "group1")
.StartNow()
.WithSimpleSchedule(x => x
.WithIntervalInHours(24)
.RepeatForever())
.Build();
HangFire
RecurringJob.AddOrUpdate(
() => YourSendMailMethod("email@email.com"),
Cron.Daily);
IHostedService
public class SendMailHostedService : IHostedService, IDisposable
{
private readonly ILogger<SendMailHostedService> _logger;
private Timer _timer;
public SendMailHostedService(ILogger<SendMailHostedService> logger)
{
_logger = logger;
}
public Task StartAsync(CancellationToken stoppingToken)
{
_logger.LogInformation("Hosted Service running.");
_timer = new Timer(DoWork, null, TimeSpan.Zero,
TimeSpan.FromSeconds(5));
return Task.CompletedTask;
}
private void DoWork(object state)
{
//...Your stuff here
_logger.LogInformation(
"Timed Hosted Service is working. Count: {Count}", executionCount);
}
public Task StopAsync(CancellationToken stoppingToken)
{
_logger.LogInformation("Timed Hosted Service is stopping.");
_timer?.Change(Timeout.Infinite, 0);
return Task.CompletedTask;
}
public void Dispose()
{
_timer?.Dispose();
}
}
In your startup.cs class. add this at configure method.
services.AddHostedService<SendMailHostedService>();
If do not need to host it as a backgroud job on your WebApp, then you can create a Windows Service that runs every day on the time you need.
See this question: Windows service scheduling to run daily once a day at 6:00 AM
To send E-mails with C# you can take a look a SmptClient class https://learn.microsoft.com/en-us/dotnet/api/system.net.mail.smtpclient.send?view=netframework-4.8
Or use a service, like SendGrid, that can do it for you.
EDIT:
About your second question:
When you implements an interface your class should have all methods defined on that interface.
This methods needs to be public, return the same type, has the same name and receive the same parameters that was declared on the interface you implement.
In your specific case, you just miss the method name. Just change it do Execute like below.
EDIT: As you are using Quartz.net 3, the IJbo interface returns a Task and not void. So I changed the class SendMailJob to return a task of your existing method.
public class SendMailJob : IJob
{
public Task Execute(IJobExecutionContext context)
{
return Task.Factory.StartNew(() => SendEmail());
}
public void SendMail()
{
MailMessage Msg = new MailMessage();
Msg.From = new MailAddress("mymail@mail.com", "Me");
Msg.To.Add(new MailAddress("receivermail@mail.com", "ABC"));
Msg.Subject = "Inviare Mail con C#";
Msg.Body = "Mail Sended successfuly";
Msg.IsBodyHtml = true;
SmtpClient Smtp = new SmtpClient("smtp.live.com", 25);
Smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
Smtp.UseDefaultCredentials = false;
NetworkCredential Credential = new
NetworkCredential("mymail@mail.com", "password");
Smtp.Credentials = Credential;
Smtp.EnableSsl = true;
Smtp.Send(Msg);
}
}
