如何使用Windows服務跟蹤數據庫活動

Question

這裏我目前在我的SQL Server 2008數據庫中有一些日期值。我想在該日期值等於當前日期時將電子郵件警報發送到特定的郵件地址。想象一下自動化的b'day許願軟件。

這裏是我使用電子郵件functionality.It的代碼工作沒有任何問題。

private void sendMailMessage() 
     { 
      try 
      { 

       MailMessage myMessage = new MailMessage(); 
       myMessage.From = new MailAddress("noreply@somewhere.com", "Online Alert System"); 
       myMessage.To.Add(new MailAddress("someone@somewhere.com")); 
       myMessage.Subject = "Test Mail"; 
       myMessage.Body = "This is test mail from OAS."; 
       myMessage.IsBodyHtml = true; 


       SmtpClient mySmtpClient = new SmtpClient(); 
       mySmtpClient.Host="smtp.gmail.com"; 
       mySmtpClient.Port= 587; 
       mySmtpClient.Credentials = new NetworkCredential("noreply@somewhere.com", "password"); 
       mySmtpClient.EnableSsl = true; 
       mySmtpClient.Send(myMessage); 
      } 

      catch (Exception ex) 
      { 
       throw new Exception(ex.Message); 
      } 

     } 

但我想使用widows服務來做到這一點。請解釋我如何做到這一點。在這種情況下，我只對Windows服務知之甚少。

在此先感謝..！

Answer 1

// try the following code 
//in app.config add the following key 
// <add key="starttime" value="00.00"/> 
    public static System.Timers.Timer Timer; 
    Double _timeinterval; 
    public static bool IstimerEnabled = false; 
     protected override void OnStart(string[] args) 
    { 
     try 
     { 
      Timer = new System.Timers.Timer(); 
      string starttime = Convert.ToString(System.Configuration.ConfigurationManager.AppSettings["starttime"]); 
      double mins = Convert.ToDouble(starttime); 
      DateTime t = DateTime.Now.Date.AddHours(mins); 
      TimeSpan ts = new TimeSpan(); 
      ts = t.AddDays(1) - System.DateTime.Now; 
      log.WriteEntry("BBPush Service timespan ts--" + ts.ToString()); 
      if (ts.TotalMilliseconds < 0) 
      { 
       ts = t.AddDays(1) - System.DateTime.Now; 
      } 
      _timeinterval = ts.TotalMilliseconds; 
      Timer.Elapsed += new ElapsedEventHandler(OnTimedEvent); 
      Timer.Interval = _timeinterval; 
      Timer.Enabled = true; 

     } 
     catch (Exception ex) 
     { 
      log.WriteEntry("exception :" + ex.ToString()); 

     } 
     finally 
     { 
      IstimerEnabled = false; 
      Timer.Start(); 
     } 
    } 
    protected override void OnStop() 
    { 
     Timer.Stop(); 
     Timer.Dispose(); 

    } 
    private void OnTimedEvent(object source, ElapsedEventArgs e) 
    { 

     // write your code here or call the method that checks the current date with dob in your table ,fetch the matching emailid and call the mail sending method. 
     //after this method timer is set for 24 hrs. 
     Timer.Interval = 86400000; 
    }