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How to use SSIS variable outside Main() method in SSIS Script Task

I am using SSIS script task to send automated e-mail based on a few pre-conditions. As part of that I have a SendAutomatedEmail() method and in this method I am passing two variables mailServer and recipient. In doing so I run into the error "object reference not set to an instance of an object.".
Tried to use a constructor but that did not resolve the problem.
class Program
{
public void Main()
{
string mailServer = Dts.Variables["User::varServer"].Value.ToString();
string recipient = Dts.Variables["User::varRecipient"].Value.ToString();
server msr = new server(mserv, rec);
}
public class server
{
string ms;
string r;
public result(string mserv, string rec)
{
ms = mserv;
r = rec;
}
}
}
using System.IO;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
class Program
{
public void Main()
{
try
{
//do something
}
catch
{
//catch exception
}
}
public static void SendAutomatedEmail(string htmlString, string recipient = "user#domain.com")
{
try
{
string mailServer = Dts.Variables["User::varServer"].Value.ToString(); //error "object reference not set to an instance of an object."
string recipient = Dts.Variables["User::varRecipient"].Value.ToString(); //error "object reference not set to an instance of an object."
MailMessage message = new MailMessage("it#domain.com", recipient);
message .IsBodyHtml = true;
message .Body = htmlString;
message .Subject = "Test Email";
SmtpClient client = new SmtpClient(mailServer);
var AuthenticationDetails = new NetworkCredential("user#domain.com", "password");
client.Credentials = AuthenticationDetails;
client.Send(message);
}
catch (Exception e)
{
//catch exception
}
}
}
I should be able to pass the value to the variable seamlessly in the SendAutomatedEmail() method.

Simplest way is to declare 2 variables in Program Class, read the values within the Main() function and assign these values to the local variables. Then you can use local variables outside of Main() function.
using System.IO;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
class Program
{
string mailServer;
string recipient;
public void Main()
{
try
{
mailServer = Dts.Variables["User::varServer"].Value.ToString();
recipient = Dts.Variables["User::varRecipient"].Value.ToString();
}
catch
{
//catch exception
}
}
private class sendEMail
{
public static void SendAutomatedEmail(string htmlString, string recipient = "user#domain.com")
{
try
{
MailMessage message = new MailMessage("it#domain.com", recipient);
message .IsBodyHtml = true;
message .Body = htmlString;
message .Subject = "Test Email";
SmtpClient client = new SmtpClient(mailServer);
var AuthenticationDetails = new NetworkCredential("user#domain.com", "password");
client.Credentials = AuthenticationDetails;
client.Send(message);
}
catch (Exception e)
{
//catch exception
}
}
}
}

Getting failures for C# email sending

This is the code that I have been making and I just tested to check whether it works but having an error message stating "System.FormatException"
I can't understand what I am having such problem. Please help
public Mail(string sendMail)
{
this.sendAddress = new MailAddress(sendMail); // exception here
}
public void SetToAddress(string toMail)
{
this.toAddress = new MailAddress(toMail);
}
public string SendEmail(string subject, string body)
{
SmtpClient smtp = null;
MailMessage message = null;
try
{
smtp = new SmtpClient
{
Host = "smtp.gmail.com",
EnableSsl = true,
DeliveryMethod = SmtpDeliveryMethod.Network,
Credentials = new NetworkCredential(sendAddress.Address, sendPassword),
Timeout = 20000
};
message = new MailMessage(sendAddress, toAddress)
{
Subject = subject,
Body = body
};
smtp.Send(message);
return "send mail ok";
}
catch (Exception e)
{
return "send mail fail";
}
finally
{
if (smtp != null) { smtp.Dispose(); }
if (message != null) { message.Dispose(); }
}
}
}
namespace WindowsFormsApp12
{
public partial class Form1 : Form
{
Mail mail = new Mail("email address type");
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string toAddress = this.textBox2.Text;
string subject = this.textBox1.Text;
string body = this.textBox3.Text;
if (toAddress == "")
{
MessageBox.Show("type in email address");
}
if (subject == "")
{
MessageBox.Show("type in email title");
}
if (body == "")
{
MessageBox.Show("type in email contents");
}
mail.SetToAddress(toAddress);
MessageBox.Show(mail.SendEmail(subject, body));
}
}
}

You are not setting the .from part of mail.
mail = new MailMessage(sendAddress, toAddress)
{
Subject = subject,
Body = body,
From = new MailAddress("Blah#Blah.com;")
};
to addresses can be added like
mail.To.Add("email#address.com");

FormatException for the constructor of MailAddress indicates an invalid email address. Source MSDN documentation for MailAddress constructor.

ASP.NET Identity UserManager IIdentityMessageService pass extra parameters to SendAsync

I've successfully created custom email service provider for UserManager by extending IIdentityMessageService:
public class ExchangeEmailService : IIdentityMessageService
{
public async Task SendAsync(IdentityMessage message)
{
using (var client = new SmtpClient())
{
client.Host = "mail.example.com";
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential(#"noreply", "P#ssw0rd");
var from = new MailAddress("no-reply#example.com");
var to = new MailAddress(message.Destination);
var mailMessage = new MailMessage(from, to)
{
Subject = message.Subject,
Body = message.Body,
IsBodyHtml = true
};
await client.SendMailAsync(mailMessage);
}
}
}
Inside UserManager's Create I'm creating new instance of my service and assigning it to EmailService:
userManager.EmailService = new ExchangeEmailService();
This all works fine, but I have requirement to send emails from different email addresses, based on place this is called from, unfortunately UserManager.SendEmailAsync isn't allowing me to pass anything except userId, subject and body.
Ideally I'd like to be able to specify email address when calling SendEmailAcync or enum value.
I've searched in UserManager source and I thought about creating custom SendEmailAsync implementation, but I'd have to change multiple places - IIdentityMessageService, UserManager.
I know I can create new interface and build my email sending class on it, but I'd like to keep changes to minimum.
What I'd like to get:
I'd like to have enum containing names of mailboxes:
public enum Mailboxes
{
Noreply = 0,
Service = 1,
Contact = 2
}
and be able to call SendEmailAsync with that additional parameter:
await UserManager.SendEmailAsync(user.Id, "Account created", "Nice email content.", Mailboxes.Noreply );
I'm aware that I can set different title and use same email address, but this is requirement I got.
How can I do that?

A hack would be to create a model to store what you want sent to the service
public class MessageBody {
public string Body { get; set; }
public MailBoxes Source { get; set; }
}
and then serialize it (JSON maybe) as the body parameter of the SendEmailAsync method call.
var message = new MessageBody {
Body = "Nice email content.",
Source = Mailboxes.Noreply
};
var body = JsonConvert.SerializeObject(message);
await UserManager.SendEmailAsync(user.Id, "Account created", body);
The service would then deserialize the model, construct the email with the custom info and then send the email.
public class ExchangeEmailService : IIdentityMessageService {
readonly IMailBoxProvider provider;
public ExchangeEmailService(IMailBoxProvider provider) {
this.provider = provider;
}
public async Task SendAsync(IdentityMessage message) {
using (var client = new SmtpClient()) {
client.Host = "mail.example.com";
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new NetworkCredential(#"noreply", "P#ssw0rd");
//Get the body and from address
var fromEmailAddress = "default-email#example.com";
var body = message.Body;
try {
var msg = JsonConvert.DeserializeObject<MessageBody>(body);
if(msg != null) {
body = msg.Body;
fromEmailAddress = provider.GetMailbox(msg.Source);
}
} catch { }
var from = new MailAddress(fromEmailAddress);
var to = new MailAddress(message.Destination);
var mailMessage = new MailMessage(from, to)
{
Subject = message.Subject,
Body = body,
IsBodyHtml = true
};
await client.SendMailAsync(mailMessage);
}
}
}
And just make sure to assigning it to UserManager.EmailService:
userManager.EmailService = new ExchangeEmailService(new MailBoxProvider());

Send mail from my SMTP Client in xamarin

I try send mail with my smtp client but i dont have exception and mail doesn't recieved.
public void SendSMTPMail(string from, string to, string subject, string body)
{
var smtp_client = new SmtpClient("mail.mydomain.gr",25);
smtp_client.UseDefaultCredentials = false;
smtp_client.EnableSsl = false;
smtp_client.Credentials = new NetworkCredential("noreply#mydomain.gr", "mypass");
ServicePointManager.ServerCertificateValidationCallback = (s, certificate, chain, sslPolicyErrors) => true;
var msg = new MailMessage(from, to );
msg.Subject = subject;
msg.Body = body;
smtp_client.SendAsync(msg , string.Empty);
}
i use breakpoint and i find some info
smtp_client.ServicePoint System.NotImplementException: The request feature is not implemented
but i use this code with another smtp and works fine. Any help ?

As an alternative, you could use my MailKit library to send mail using Xamarin.iOS/Android/Mac.
public void SendSMTPMail(string from, string to, string subject, string body)
{
var message = new MimeMessage ();
var builder = new BodyBuilder ();
message.From.Add (InternetAddress.Parse (from));
message.To.Add (InternetAddress.Parse (to));
message.Subject = subject;
builder.TextBody = body;
message.Body = builder.ToMessageBody ();
using (var client = new SmtpClient ()) {
client.ServerCertificateValidationCallback = (s, certificate, chain, sslPolicyErrors) => true;
client.Connect ("mail.mydomain.gr", 25, false);
client.Authenticate ("noreply#mydomain.gr", "mypass");
client.Send (message);
client.Disconnect (true);
}
}

It seems like you can't use the System.Net.Mail.SmtpClient in Xamarin.
Instead you should use the the mail service with native implementation. Tiny example here. The Forms code:
public abstract class EmailService
{
public static readonly Lazy<EmailService> Instance = new Lazy<EmailService>(() => DependencyService.Get<EmailService>());
public abstract bool CanSend { get; }
public abstract void ShowDraft(string subject, string body, bool html, string to, byte[] screenshot = null);
public abstract void ShowDraft(string subject, string body, bool html, string[] to, string[] cc, string[] bcc, byte[] screenshot = null);
}
The native iOS code:
public class EmailServiceIos : EmailService
{
public override bool CanSend
{
get
{
return MFMailComposeViewController.CanSendMail;
}
}
public override void ShowDraft(
string subject,
string body,
bool html,
string[] to,
string[] cc,
string[] bcc,
byte[] screenshot = null)
{
var mailer = new MFMailComposeViewController();
mailer.SetMessageBody(body ?? string.Empty, html);
mailer.SetSubject(subject ?? string.Empty);
mailer.SetCcRecipients(cc);
mailer.SetToRecipients(to);
mailer.Finished += (s, e) => ((MFMailComposeViewController)s).DismissViewController(true, () => { });
if (screenshot != null)
{
mailer.AddAttachmentData(NSData.FromArray(screenshot), "image/png", "screenshot.png");
}
UIViewController vc = UIApplication.SharedApplication.KeyWindow.RootViewController;
while (vc.PresentedViewController != null)
{
vc = vc.PresentedViewController;
}
vc.PresentViewController(mailer, true, null);
}
public override void ShowDraft(string subject, string body, bool html, string to, byte[] screenshot = null)
{
this.ShowDraft(subject, body, html, new[] { to }, new string[] { }, new string[] { }, screenshot);
}
}
And invoke the whole thing from the Forms code like:
var emailService = DependencyService.Get<EmailService>();
if (emailService.CanSend)
{
emailService.ShowDraft(
"Your caption",
"Your text",
true,
"your#ddress.com");
}

Google Mailer Class

I have a mailer for Google as shown below, how can i adapt this for other mail systems? Is there a better way of doing this? also how can i change the name of where the mail is from(the sender).
All help would be much appreciated, and thank you in advance
MailMessage message = new MailMessage();
message.From = new MailAddress(MailAddresds);
message.Subject = messagesubject;
message.Body = messagebody;
message.To.Add(messageto);
SmtpClient client = new SmtpClient();
client.Credentials = new NetworkCredential(userName, password);
client.Host = "smtp.gmail.com";
client.Port = 587;
client.EnableSsl = true;
client.Send(message);

Just example:
public class MailMessage
{
public string From{get;set;}
public string To{get;set;}
public string Body{get;set;}
public string Subject{get;set;}
....
//other common properties you may need
}
//interface
public interface IMailService
{
Send(MailMessage m);
}
concrete implementations:
public class GoogleMail : IMailService
{
public Send(Message msg)
{
//google mail specific code
}
}
public class YahooMail : IMailService
{
public Send(Message msg)
{
//yahoo mail specific code
}
}
.... Hotmail,...
somewhere in the code create a collection of supported mail services
var mailservices = new List<IMailService>();
mailservices.Add(new GoogleMail ());
mailservice.Add(new YahooMail ());
after, during the program run, pick the appropriate service to proceed user request.

simple example:
using System.Web.Mail;
MailMessage objMessage = new MailMessage();
objMessage.From = "from";
objMessage.To = "to";
objMessage.Subject = "subject";
objMessage.BodyFormat = MailFormat.Text;
objMessage.Body = "body";
SmtpMail.SmtpServer = "SmtpServer";
SmtpMail.Send(objMessage);