Send Email with Event Handler in Managed C++/CLI¶

#include "stdafx.h"
using namespace System;
using namespace EASendMail;

//EASendMail EventHandler
System::Void OnIdle( System::Object ^sender, System::Boolean % cancel )
{
    // this event is fired when the SmtpClient is wait for response from
    // SMTP server, if you add Application.DoEvents in windows form application,
    // it can prevent your form has no response before SendMail is not returned.
    // Application::DoEvents();
}

System::Void OnConnected(System::Object ^sender, System::Boolean % cancel )
{
    Console::WriteLine("Connected");
}

System::Void OnSendingDataStream(System::Object ^sender, int sent,
                                    int total, System::Boolean % cancel )
{
    Console::WriteLine( String::Format( "{0}/{1} sent", sent, total));
}

System::Void OnAuthorized( System::Object ^sender, System::Boolean % cancel )
{
    Console::WriteLine("Authorized");
}

System::Void OnSecuring( System::Object ^sender, System::Boolean % cancel )
{
    Console::WriteLine("Securing ...");
}

int main(array<System::String ^> ^args)
{
    try
    {
        SmtpMail ^oMail = gcnew SmtpMail("TryIt");
        // Set sender email address, please change it to yours
        oMail->From = "test@emailarchitect.net";
        // Set recipient email address, please change it to yours
        oMail->To = gcnew AddressCollection("support@emailarchitect.net");

        // Set email subject
        oMail->Subject = "test email from Managed C++ project";
        // Set email body
        oMail->TextBody = "this is a test email sent from Managed C++ project, do not reply";

        // Your SMTP server address
        SmtpServer ^oServer = gcnew SmtpServer("smtp.emailarchitect.net");

        // User and password for ESMTP authentication.
        oServer->User = "test@emailarchitect.net";
        oServer->Password = "testpassword";

        // Most mordern SMTP servers require SSL/TLS connection now.
        // ConnectTryTLS means if server supports SSL/TLS, SSL/TLS will be used automatically.
        oServer->ConnectType = SmtpConnectType::ConnectTryTLS;

        // If your SMTP server uses 587 port
        // oServer->Port = 587;

        // If your SMTP server requires SSL/TLS connection on 25/587/465 port
        // oServer->Port = 25; // 25 or 587 or 465
        // oServer->ConnectType = SmtpConnectType::ConnectSSLAuto;

        Console::WriteLine("start to send email with event handler ...");

        SmtpClient ^oSmtp = gcnew SmtpClient();
        // Catching the following events is not necessary,
        // just make the application more user friendly.
        // If you use the object in asp.net/windows service or non-gui application,
        // You need not to catch the following events.
        oSmtp->OnIdle += gcnew SmtpClient::OnIdleEventHandler(&OnIdle);
        oSmtp->OnAuthorized += gcnew SmtpClient::OnAuthorizedEventHandler(&OnAuthorized);
        oSmtp->OnConnected += gcnew SmtpClient::OnConnectedEventHandler(&OnConnected);
        oSmtp->OnSecuring += gcnew SmtpClient::OnSecuringEventHandler(&OnSecuring);
        oSmtp->OnSendingDataStream +=
                    gcnew SmtpClient::OnSendingDataStreamEventHandler(&OnSendingDataStream);

        oSmtp->SendMail(oServer, oMail);
        Console::WriteLine("email was sent successfully!");
    }
    catch (Exception ^ep)
    {
        Console::WriteLine("failed to send email with the following error:");
        Console::WriteLine(ep->Message);
    }

    return 0;
}