(MFC) Get IMAP UID from Email Header

Demonstrates how to get the IMAP UID from an email header. After fetching an email or header using IMAP, the UID is contained in the ckx-imap-uid header field.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkImap.h>
#include <CkMessageSet.h>
#include <CkEmailBundle.h>
#include <CkEmail.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkImap imap;

    // Connect to an IMAP server.
    // Use TLS
    imap.put_Ssl(true);
    imap.put_Port(993);
    bool success = imap.Connect("imap.someMailServer.com");
    if (success != true) {
        strOut.append(imap.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Login
    success = imap.Login("login","password");
    if (success != true) {
        strOut.append(imap.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success != true) {
        strOut.append(imap.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    bool fetchUids = true;
    // Get the message UIDs of all the emails in the mailbox
    CkMessageSet *messageSet = imap.Search("ALL",fetchUids);
    if (imap.get_LastMethodSuccess() != true) {
        strOut.append(imap.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkEmailBundle *bundle = imap.FetchHeaders(*messageSet);
    if (imap.get_LastMethodSuccess() != true) {
        delete messageSet;
        strOut.append(imap.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The UID of each fetched email header is available 
    // in the ckx-imap-uid header field.
    int i = 0;
    int szBundle = bundle->get_MessageCount();
    CkMessageSet msOneMsg;
    while (i < szBundle) {
        CkEmail *email = bundle->GetEmail(i);

        // Build a message set containing one UID
        const char *uidStr = email->getHeaderField("ckx-imap-uid");
        msOneMsg.FromCompactString(uidStr);

        // Move this message to some other folder.
        success = imap.MoveMessages(msOneMsg,"someOtherFolder");
        if (success != true) {
            strOut.append(imap.lastErrorText());
            strOut.append("\r\n");
            // Exit the loop...
            i = szBundle;
        }

        delete email;
        i = i + 1;
    }

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

    delete messageSet;
    delete bundle;


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }