(Unicode C++) Rename Email Attachments After Adding

Demonstrates how to rename email attachments after adding but before sending.

Chilkat C/C++ Library Downloads
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#include <CkMailManW.h>
#include <CkEmailW.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkMailManW mailman;

    mailman.put_SmtpHost(L"smtp.my-mail-server.com");
    mailman.put_SmtpUsername(L"MY_SMTP_USERNAME");
    mailman.put_SmtpPassword(L"MY_SMTP_PASSWORD");
    mailman.put_SmtpSsl(true);
    mailman.put_SmtpPort(465);

    CkEmailW email;

    email.put_Subject(L"This is a test");
    email.put_Body(L"This is a test");
    email.put_From(L"Chilkat Support <support@chilkatsoft.com>");
    bool success = email.AddTo(L"Chilkat Admin",L"admin@chilkatsoft.com");
    // To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

    // Add some attachments.
    // The AddFileAttachment method returns the value of the content-type it chose for the attachment.
    const wchar_t *contentType = email.addFileAttachment(L"qa_data/jpg/starfish.jpg");
    if (email.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",email.lastErrorText());
        return;
    }

    contentType = email.addFileAttachment(L"qa_data/pdf/fishing.pdf");
    if (email.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",email.lastErrorText());
        return;
    }

    // If we save the email to a .eml, we can examine in a text editor.
    success = email.SaveEml(L"qa_output/e1.eml");
    if (success == false) {
        wprintf(L"%s\n",email.lastErrorText());
        wprintf(L"Failed to save .eml\n");
        return;
    }

    // We see the following in the e1.eml
    // Notice that Chilkat replaced the full path with just the filename.
    // The full local path is not part of the email that gets sent..

    // ...
    // --------------020807050607070004010609
    // Content-Type: image/jpeg; name="starfish.jpg"
    // Content-Transfer-Encoding: base64
    // Content-Disposition: attachment; filename="starfish.jpg"
    // 
    // ...
    // --------------020807050607070004010609
    // Content-Type: application/pdf; name="fishing.pdf"
    // Content-Transfer-Encoding: base64
    // Content-Disposition: attachment; filename="fishing.pdf"
    // ...

    // Before sending, each filename can be changed within the email object.
    // For example:
    success = email.SetAttachmentFilename(0,L"orange_starfish.jpg");
    success = email.SetAttachmentFilename(1,L"tuna_fishing.pdf");

    // Look at the new MIME source of the email in a  text editor...
    success = email.SaveEml(L"qa_output/e2.eml");
    if (success == false) {
        wprintf(L"%s\n",email.lastErrorText());
        wprintf(L"Failed to save .eml\n");
        return;
    }

    // You'll see this:

    // ...
    // --------------020807050607070004010609
    // Content-Type: image/jpeg; name="orange_starfish.jpg"
    // Content-Transfer-Encoding: base64
    // Content-Disposition: attachment; filename="orange_starfish.jpg"
    // 
    // ...
    // --------------020807050607070004010609
    // Content-Type: application/pdf; name="tuna_fishing.pdf"
    // Content-Transfer-Encoding: base64
    // Content-Disposition: attachment; filename="tuna_fishing.pdf"
    // ...

    // Send the email with the updated filenames..
    success = mailman.SendEmail(email);
    if (success != true) {
        wprintf(L"%s\n",mailman.lastErrorText());
        return;
    }

    success = mailman.CloseSmtpConnection();
    if (success != true) {
        wprintf(L"Connection to SMTP server not closed cleanly.\n");
    }

    wprintf(L"Mail with attachments sent!\n");
    }