每天晚上8点使用Windows服务发送邮件 [英] send mail everyday at 8pm using windows services

问题描述

以下代码每3分钟发送一次邮件。但我想每天晚上8点发送一次邮件 。如何在下面的代码中设置它。

Below code is sending mail every 3 minutes. But i want to send the Mail only once in every day at 8pm. How to set this in the below code.

public partial class Scheduler : ServiceBase
   {
       System.Timers.Timer createOrderTimer;
       private Timer timer1 = null;
       public Scheduler()
       {
           InitializeComponent();
       }

       protected override void OnStart(string[] args)
       {
           ////timer1 = new Timer();
           ////this.timer1.Interval = 30000;
           ////this.timer1.Elapsed += new System.Timers.ElapsedEventHandler(this.timer1_Tick);
           ////timer1.Enabled = true;
           ////Library.WriteErrorLog("Test Window Service started");
           createOrderTimer = new System.Timers.Timer();
           createOrderTimer.Elapsed += new System.Timers.ElapsedEventHandler(GetMail);
           createOrderTimer.Interval = 180000;
           createOrderTimer.Enabled = true;
           createOrderTimer.AutoReset = true;
           createOrderTimer.Start();
       }

       private void timer1_Tick(object sender, ElapsedEventArgs e)
       {
           Library.WriteErrorLog("Timer Ticked and some job has been done successfully");
       }

       protected override void OnStop()
       {
           timer1.Enabled = false;
           Library.WriteErrorLog("Test Window Service stopped");
       }

       public void GetMail(object sender, System.Timers.ElapsedEventArgs args)
       {
           NetworkCredential cred = new NetworkCredential("[e-mail]", "abc");
           MailMessage msg = new MailMessage();
           msg.To.Add("[e-mail]");
           msg.Subject = "Welcome Venkat";

           msg.Body = "You Have Successfully Entered to venkat World!!!";
           msg.From = new MailAddress("[e-mail]"); // Your Email Id
           SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
          // SmtpClient client1 = new SmtpClient("smtp.mail.yahoo.com", 465);
           client.Credentials = cred;
           client.EnableSsl = true;
           client.Send(msg);
       }
   }

推荐答案

除了别人的建议外，我不会用一个Windows服务，用于执行计划任务以发送电子邮件。



相反，安排一个控制台应用程序（甚至PowerShell脚本）安排在每天晚上8点运行（或无论如何使用 Windows任务计划程序 [ ^ ]。



计划任务更适合您的场景。操作系统已经提供了调度基础架构时，我认为在Windows服务上构建调度机制并不是很有意义。 Windows服务更适合于必须随时响应事件而不是特定和修复周期的进程。

Apart from what other people have suggested, I would not use a Windows Service to act a "Scheduled Task" to send emails.

Instead, have a console application (or even PowerShell Script) scheduled to run at 8PM everyday (or whatever) using Windows Task Scheduler[^].

A Scheduled Task is more appropriate for your scenario. I don't think it make a lot of sense building a scheduling mechanism on a windows service when OS already provides scheduling infrastructure. A Windows service is more appropriate for processes that have to respond to events at any moment and not at specific and fix periods.

计时器 Interval 以ms为单位，因此180000 = 3 * 60 * 1000 = 3分钟，您应该使用cron作业： https://github.com/ kevincolyar / CronNET [ ^ ]

The timer Interval is in ms so 180000 = 3*60*1000 = 3 min, you should use cron jobs instead : https://github.com/kevincolyar/CronNET[^]

您可以使用cron表达式 0 0 20 1/1 *创建CRON作业窗口服务

？ * （每天晚上8点运行）



如何创建cron-job-windows-service [ ^ ]

You can create a CRON job windows service
with cron expression 0 0 20 1/1 * ? * (runEveryday at 8pm)

how-to-create-cron-job-windows-service[^]

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