Load MHT and Send as Email

Load a .MHT file and send it as email.

Download Chilkat .NET for 2.0 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

//  The mailman object is used for sending and receiving email.
Chilkat.MailMan mailman = new Chilkat.MailMan();

//  Any string argument automatically begins the 30-day trial.
bool success;
success = mailman.UnlockComponent("30-day trial");
if (success != true) {
    MessageBox.Show("Component unlock failed");
    return;
}

//  Set the SMTP server.
mailman.SmtpHost = "smtp.comcast.net";

//  Create a new email object
Chilkat.Email email = new Chilkat.Email();

//  MHT is MIME and therefore can be loaded directly
//  into an email object via the email.LoadEml method.
//  However, if the HTML sub-part of the MIME contains
//  header fields such as this:

//  Content-ID: <BalanceSheet>
//  Content-Disposition: inline;
//  	filename="BalanceSheet"
//  Content-Type: text/html;
//  	name="BalanceSheet";
//  	charset="utf-8"

//  Microsoft Outlook will interpret this as an attached HTML file
//  rather than the HTML body of the email.  Interestingly,
//  Mozilla Thunderbird handles it correctly, but Outlook does not.
//  Google's GMail also handles it correctly.  Yahoo Mail doesn't
//  know what to do and displays nothing -- not even the "attachment".

//  Rather than loading the MHT into the email object, we'll
//  first load it into a Chilkat MIME object and check for
//  these headers.  We want the header fields of the HTML sub-part
//  to look like this:

//  Content-Type: text/html;
//  	charset="utf-8"

//  To do so, we'll remove the Content-ID and Content-Disposition
//  header fields, and the "name" attribute from the
//  Content-Type header.

//  Note: Chilkat MIME is a separate product.  This code
//  would require licenses to both Chilkat Email and Chilkat Mime,
//  or alternatively a Chilkat Bundle license (which includes
//  all Chilkat components).

Chilkat.Mime mime = new Chilkat.Mime();

success = mime.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show("Failed to unlock MIME component");
    return;
}

success = mime.LoadMimeFile("test.mht");
if (success != true) {
    MessageBox.Show(mime.LastErrorText);
    return;
}

//  Is this a multipart/related?  If so, find the HTML part,
//  which should be the 1st sub-part.
if (mime.IsMultipartRelated() == true) {
    //  Find the HTML part.
    Chilkat.Mime mimePart = null;
    int n;
    int i;
    n = mime.NumParts;

    for (i = 0; i <= n - 1; i++) {
        mimePart = mime.GetPart(i);
        if (mimePart.IsHtml() == true) {
            break;
        }

    }

    if (!(mimePart == null )) {
        //  Remove these header fields:
        mimePart.SetHeaderField("Content-Disposition","");
        mimePart.SetHeaderField("Content-ID","");
        //  Remove the "name" attribute from the Content-Type header:
        mimePart.Name = "";

    }

}

email.SetFromMimeText(mime.GetMime());

email.Subject = "This is a test";

email.From = "Chilkat Support <support@chilkatsoft.com>";
email.AddTo("Chilkat Admin","admin@chilkatsoft.com");

success = mailman.SendEmail(email);
if (success != true) {
    MessageBox.Show(mailman.LastErrorText);
}
else {
    MessageBox.Show("Mail Sent!");
}