使用windows服务定时发送email核心代码

public partial class Service1 : ServiceBase
    {
        private Thread _thread;
        private bool StopThreads = false;
        private bool HasSentMail = false;  
        public Service1()
        {
            InitializeComponent();
            try
            {
                _thread = new Thread(new ThreadStart(sendmail));
            }
            catch (Exception e)
            { }
        }

        protected override void OnStart(string[] args)
        {
            _thread.Start();
        }

        protected override void OnStop()
        {
            // TODO: 在此处添加代码以执行停止服务所需的关闭操作。
            StopThreads = true;
            RunLog.WriteLog("Service stop at:");
        }
        private void sendmail()
        {
            RunLog.WriteLog("Service start at:");
            while (!StopThreads)
            {
                if (DateTime.Now.Day==28 && DateTime.Now.Hour==9 && DateTime.Now.Minute<=10 && HasSentMail==false)
                {
                   
                    MailMessage mm;
                    mm = new MailMessage();
                    StringBuilder ensb = new StringBuilder();
                    StringBuilder cnsb = new StringBuilder();
                    mm.From = new MailAddress("abc@domain.com");
                    mm.Subject = "Test";
                    mm.BodyEncoding = System.Text.Encoding.UTF8;
                    mm.BodyEncoding =Encoding.UTF8;
                    mm.IsBodyHtml=true;
                    DataSet ds = sgbox_namelistDac.GetList();
                    SmtpClient sc = new SmtpClient("smtp.domain.com");
                    for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                    {
                        mm.Body = "<htmp><body><font size=2 face='Arial, Helvetica, sans-serif'>Dear Supplier </font>" + ensb.ToString() + "<font size=2 face='Arial, Helvetica, sans-serif'>尊敬的供应商 " + cnsb.ToString();
                        mm.To.Clear();
                        mm.To.Add(new MailAddress(ds.Tables[0].Rows[i]["email"].ToString().Trim()));
                        try
                        {
                            sc.Send(mm);
                            RunLog.WriteLog("Sent at:");
                        }
                        catch (Exception e)
                        {
                            RunLog.WriteLog("SMTP发送失败:" + e.Message);
                            return;
                        }
                        Thread.Sleep(3000);
                    }

                    HasSentMail = true;
                }
                else
                {
                    HasSentMail = false;
                }
                Thread.Sleep(600000);
            }
           
        }
    }

原文地址:https://www.cnblogs.com/chillsrc/p/1091967.html