Sending mail in Managed C++ using SMTP

• Download source files - 2 Kb

Introduction

I wrote this class after reading Agus Kurniawan's article "Sending Mail in C# using SMTP". So please make sure you recognize Agus's work. I just create it a class in Managed C++ to send mail.

The thing the bothers me the most, while writing MC++, is conversions and types. The new String type in Managed C++, in my opinion, does not have the flexibility that I expected.

Code listings

These is the code of the class starting with the header file:

// Header File
#pragma once

__gc class CSendEmail
{
public:
    CSendEmail(String * Server);
    bool SendEmail( String * From, 
        String * To, 
        String * Subject,
        String * Body);

private:
    String * m_sServer;

};

Note the declaration of ConvertToChar as a member of the class.

This is the cpp file:

#using <mscorlib.dll>
#using <System.dll>

using namespace System;
using namespace System::Runtime::InteropServices;
using namespace System::Net;
using System::Net::Sockets::NetworkStream;
using System::Net::Sockets::TcpClient;
using System::IO::StreamReader;

#include "sendemail.h"

CSendEmail::CSendEmail(String * Server)
{
    m_sServer = Server;
}

bool CSendEmail::SendEmail( String * From, 
                           String * To, 
                           String * Subject,
                           String * Body)
{
    NetworkStream  * pNsEmail;
    StreamReader   * RdStrm;
    String           * Data;
    unsigned char  sendbytes __gc[];


    TcpClient *pServer = new TcpClient(m_sServer,25);

    try
    {
        pNsEmail = pServer->GetStream();
        RdStrm = new StreamReader(pServer->GetStream());
    }

    catch (Exception  * e )
    {
        Console::WriteLine(e->ToString());
        Console::WriteLine("Socket Close by the server");

        pServer->Close();
        sendbytes = 0;
        return false;
    }

    Console::WriteLine(RdStrm->ReadLine());

    Data  = "HELO server \r\n";    
    sendbytes = System::Text::Encoding::ASCII->GetBytes(Data);    
    pNsEmail->Write(sendbytes, 0, sendbytes->get_Length());
    sendbytes = 0;
    Data = 0;
    Console::WriteLine(RdStrm->ReadLine());

    Data = String::Concat(S"MAIL FROM: ",
        S"<", From, S">", S"\r\n");     
    sendbytes = System::Text::Encoding::ASCII->GetBytes(Data);    
    pNsEmail->Write(sendbytes, 0, sendbytes->get_Length());
    sendbytes = 0;
    Data = 0;
    Console::WriteLine(RdStrm->ReadLine());

    Data = String::Concat(S"RCPT TO: ", 
        S"<", To, S">", S"\r\n");    
    sendbytes = System::Text::Encoding::ASCII->GetBytes(Data);
    pNsEmail->Write(sendbytes, 0, sendbytes->get_Length());
    sendbytes = 0;
    Data = 0;
    Console::WriteLine(RdStrm->ReadLine());

    Data = "DATA \r\n";
    sendbytes = System::Text::Encoding::ASCII->GetBytes(Data);
    pNsEmail->Write(sendbytes, 0, sendbytes->get_Length());
    sendbytes = 0;
    Data = 0;
    Console::WriteLine(RdStrm->ReadLine());

    Data = String::Concat(S"FROM: ", From, S"\r\n", S"SUBJECT: ", 
        Subject, S"\r\n", Body, S"\r\n.\r\n");
    sendbytes = System::Text::Encoding::ASCII->GetBytes(Data);
    pNsEmail->Write(sendbytes, 0, sendbytes->get_Length());
    sendbytes = 0;
    Data = 0;
    Console::WriteLine(RdStrm->ReadLine());

    Data = "QUIT \r\n";
    sendbytes = System::Text::Encoding::ASCII->GetBytes(Data);
    pNsEmail->Write(sendbytes, 0, sendbytes->get_Length());
    sendbytes = 0;
    Data = 0;
    Console::WriteLine(RdStrm->ReadLine());

    pNsEmail->Close();
    RdStrm->Close();
    pServer->Close();

}

Usage

// your SMTP server
CSendEmail * pServer = new CSendEmail("mail.server.com");

pEmail->SendEmail("you@yourserver.com",
                     "yourfriend@yourfriendserver.com",
                     "Hello Friend",
                     "Message body");

I do know, that there is no UI in this program. When Microsoft creates a UI for forms as C# style, I'll update this article. I don't really want to use MFC. Have fun!

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here