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

Scan for emails with attachments and save attachments.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

bool success = false;

// 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;
success = imap.Connect("imap.example.com");
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

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

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

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

// Get the message IDs of all the emails in the mailbox
Chilkat.MessageSet messageSet = new Chilkat.MessageSet();
success = imap.QueryMbx("ALL",fetchUids,messageSet);
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Fetch the email headers into a bundle object:
Chilkat.EmailBundle bundle = new Chilkat.EmailBundle();
bool headersOnly = true;
success = imap.FetchMsgSet(headersOnly,messageSet,bundle);
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

// Scan for emails with attachments, and save the attachments
// to a sub-directory.
Chilkat.Email fullEmail = new Chilkat.Email();
Chilkat.Email emailHeader = new Chilkat.Email();
int i = 0;
while (i < bundle.MessageCount) {
    // The bundle contains email headers..
    bundle.EmailAt(i,emailHeader);

    // Does this email have attachments?
    // Use GetMailNumAttach because the attachments
    // are not actually in the email object because
    // we only downloaded headers.
    int numAttach = imap.GetMailNumAttach(emailHeader);

    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.

        // 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 = emailHeader.GetHeaderField("ckx-imap-uid");
        int uid = Convert.ToInt32(uidStr);

        success = imap.FetchEmail(false,uid,true,fullEmail);
        if (success == false) {
            Debug.WriteLine(imap.LastErrorText);
            return;
        }

        success = fullEmail.SaveAllAttachments("attachmentsDir");

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

    }

    i = i + 1;
}

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