How To Send An Email From Service Application C#

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• Updated date Feb 17, 2015

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This article explains how to create a Windows Service to schedule daily mail at a specified time.

Introduction

In this article I am explaining how to create a Windows Service to schedule daily mail at a specified time. Scheduling email and sending the email is a basic requirement of any project.

Step 1

Open Visual Studio and create a new project. Under Windows Desktop select Windows Service and provide a proper name and click on the OK button.

Step 2

Rename the service1 class to a proper name. In this case I am using mail service. Click on "Click here to switch to code view".

Step 3

Add some app settings in the app.config file as in the following:

1. <appSettings>
2.    <add key="StartTime"  value= "08:33 PM " />
3.    <add key="callDuration"  value= "2" />
4.    <add key="CallType"  value= "1" />
5.    <add key="FromMail"  value= "****" />
6.    <add key="Password"  value= "****" />
7.    <add key="Host"  value= "smtpout.secureserver.net" />
8. </appSettings>

Step 4

In the MailService class write the following function.

1. public  Scheduler()
2. {
3.    InitializeComponent();
4.    int  strTime = Convert.ToInt32(ConfigurationManager.AppSettings[ "callDuration" ]);
5.    getCallType = Convert.ToInt32(ConfigurationManager.AppSettings["CallType" ]);
6.    if  (getCallType == 1)
7.    {
8.       timer1 =new  System.Timers.Timer();
9.       double  inter = ( double )GetNextInterval();
10.       timer1.Interval = inter;
11.       timer1.Elapsed +=new  ElapsedEventHandler(ServiceTimer_Tick);
12.    }
13.    else
14.    {
15.       timer1 =new  System.Timers.Timer();
16.       timer1.Interval = strTime * 1000;
17.       timer1.Elapsed +=new  ElapsedEventHandler(ServiceTimer_Tick);
18.    }
19. }

Note: For using the ConfigurationManager add the reference first and then use the class.

1. private double  GetNextInterval()
2. {
3.    timeString = ConfigurationManager.AppSettings["StartTime" ];
4.    DateTime t = DateTime.Parse(timeString);
5.    TimeSpan ts =new  TimeSpan();
6.    int  x;
7.    ts = t - System.DateTime.Now;
8.    if  (ts.TotalMilliseconds < 0)
9.    {
10.       ts = t.AddDays(1) - System.DateTime.Now;
11.    }
12.    return  ts.TotalMilliseconds;
13. }
14. private void  SetTimer()
15. {
16.    try
17.    {
18.       double  inter = ( double )GetNextInterval();
19.       timer1.Interval = inter;
20.       timer1.Start();
21.    }
22.    catch  (Exception ex)
23.    {
24.    }
25. }

In the timer OnStart() function first write a message to the log that the service has been started and when the service stops write to the log that the service has stopped.

1. protected override void  OnStart( string [] args)
2. {
3.     timer1.AutoReset =true ;
4.     timer1.Enabled =true ;
5.     ServiceLog.WriteErrorLog("Daily Reporting service started" );
6. }
8. protected override void  OnStop()
9. {
10.     timer1.AutoReset =false ;
11.     timer1.Enabled =false ;
12.     ServiceLog.WriteErrorLog("Daily Reporting service stopped" );
13. }

Here I am creating a class ServiceLog that contains the followings function.

5. public static void  WriteErrorLog(Exception ex)
6. {
7.     StreamWriter sw =null ;
8. try
9.     {
10.         sw =new  StreamWriter(AppDomain.CurrentDomain.BaseDirectory + "\\LogFile.txt" , true );
11.         sw.WriteLine(DateTime.Now.ToString() +": "  + ex.Source.ToString().Trim() + "; "  + ex.Message.ToString().Trim());
12.         sw.Flush();
13.         sw.Close();
14.     }
15. catch
16.     {
17.     }
18. }
23. public static void  WriteErrorLog( string  Message)
24. {
25.     StreamWriter sw =null ;
26. try
27.     {
28.         sw =new  StreamWriter(AppDomain.CurrentDomain.BaseDirectory + "\\LogFile.txt" , true );
29.         sw.WriteLine(DateTime.Now.ToString() +": "  + Message);
30.         sw.Flush();
31.         sw.Close();
32.     }
33. catch
34.     {
35.     }
36. }

This class also contains a function that will send email to the mail id passed by its arguments.

1. #region Send Email Code Function
10. public static void  SendEmail(String ToEmail, string  cc, string  bcc, String Subj, string  Message)
11.      {
14. string  HostAdd = ConfigurationManager.AppSettings[ "Host" ].ToString();
15. string  FromEmailid = ConfigurationManager.AppSettings[ "FromMail" ].ToString();
16. string  Pass = ConfigurationManager.AppSettings[ "Password" ].ToString();
19.          MailMessage mailMessage =new  MailMessage();
20.          mailMessage.From =new  MailAddress(FromEmailid);
21.          mailMessage.Subject = Subj;
22.          mailMessage.Body = Message;
23.          mailMessage.IsBodyHtml =true ;
25. string [] ToMuliId = ToEmail.Split( ',' );
26. foreach  ( string  ToEMailId in  ToMuliId)
27.          {
28.              mailMessage.To.Add(new  MailAddress(ToEMailId));
29.          }
32. string [] CCId = cc.Split( ',' );
34. foreach  ( string  CCEmail in  CCId)
35.          {
36.              mailMessage.CC.Add(new  MailAddress(CCEmail));
37.          }
39. string [] bccid = bcc.Split( ',' );
41. foreach  ( string  bccEmailId in  bccid)
42.          {
43.              mailMessage.Bcc.Add(new  MailAddress(bccEmailId));
44.          }
45.          SmtpClient smtp =new  SmtpClient();
46.          smtp.Host = HostAdd;
50.          smtp.EnableSsl =false ;
51.          NetworkCredential NetworkCred =new  NetworkCredential();
52.          NetworkCred.UserName = mailMessage.From.Address;
53.          NetworkCred.Password = Pass;
54.          smtp.UseDefaultCredentials =true ;
55.          smtp.Credentials = NetworkCred;
56.          smtp.Port = 3535;
57.          smtp.Send(mailMessage);
58.      }
60.      

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