(.NET Core C#) Scan for Emails with Attachments and Save Attachments to Files

Scan for emails with attachments and save attachments.

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

Chilkat.Imap imap = new Chilkat.Imap();

// Connect to an IMAP server.
// Use TLS
imap.Ssl = true;
imap.Port = 993;
bool success = imap.Connect("imap.someMailServer.com");
if (success != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Login
success = imap.Login("myLogin","myPassword");
if (success != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Select an IMAP mailbox
success = imap.SelectMailbox("Inbox");
if (success != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

Chilkat.MessageSet messageSet = null;
// We can choose to fetch UIDs or sequence numbers.
bool fetchUids = true;

// Get the message IDs of all the emails in the mailbox
messageSet = imap.Search("ALL",fetchUids);
if (imap.LastMethodSuccess != true) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Fetch the email headers into a bundle object:
Chilkat.EmailBundle bundle = null;
bundle = imap.FetchHeaders(messageSet);
if (imap.LastMethodSuccess != true) {

    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Scan for emails with attachments, and save the attachments
// to a sub-directory.
int i;
for (i = 0; i <= bundle.MessageCount - 1; i++) {
    Chilkat.Email email = null;
    email = bundle.GetEmail(i);

    // Does this email have attachments?
    // Use GetMailNumAttach because the attachments
    // are not actually in the email object because
    // we only downloaded headers.
    // (Had we downloaded the full emails by
    // calling mailman.FetchBundle, we could look
    // at the email object's NumAttachments property.)
    int numAttach = imap.GetMailNumAttach(email);

    if (numAttach > 0) {
        // Download the entire email and save the
        // attachments. (Remember, we 
        // need to download the entire email because
        // only the headers were previously downloaded.
        // If the entire emails were downloaded by
        // calling FetchBundle instead of FetchHeaders,
        // this would not be necessary.

        // The ckx-imap-uid header field is added when
        // headers are downloaded.  This makes it possible
        // to get the UID from the email object.
        string uidStr = email.GetHeaderField("ckx-imap-uid");
        int uid = Convert.ToInt32(uidStr);

        Chilkat.Email fullEmail = null;
        fullEmail = imap.FetchSingle(uid,true);
        if (imap.LastMethodSuccess == true) {
            success = fullEmail.SaveAllAttachments("attachmentsDir");

        }

        int j;
        for (j = 0; j <= numAttach - 1; j++) {
            string filename = imap.GetMailAttachFilename(email,j);
            Debug.WriteLine(filename);
        }

    }

}

// Disconnect from the IMAP server.
success = imap.Disconnect();