Store One or More Flags on a Single Message

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Demonstrates the Chilkat Imap.StoreFlags method, which sets or clears one or more flags on a single message identified by ID. The first argument is the message ID, the second (bUid) selects UID vs sequence number, the third is a space-separated list of flag names, and the fourth is the value (1 to set, 0 to clear). This example applies the Seen and Flagged flags to one message by UID.

Background: StoreFlags is the single-message counterpart to SetFlags and lets you change several flags at once by listing them space-separated (without leading backslashes). Because the ID can be either a UID or a sequence number, the bUid argument must match how you obtained it — a UID from a UID search, or a sequence number from a sequence-based operation. UIDs are the safer choice since they remain valid as the mailbox changes.

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bool success = false;

//  Demonstrates the Imap.StoreFlags method, which sets or clears one or more flags on a single
//  message identified by ID.  The 1st argument is the message ID, the 2nd (bUid) selects UID
//  vs sequence number, the 3rd is a space-separated list of flag names, and the 4th is the
//  value (1 to set, 0 to clear).

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

imap.Ssl = true;
imap.Port = 993;

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

success = imap.Login("user@example.com","myPassword");
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

success = imap.SelectMailbox("Inbox");
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

//  Get the UIDs of all messages.
Chilkat.MessageSet msgSet = new Chilkat.MessageSet();
success = imap.QueryMbx("ALL",true,msgSet);
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

if (msgSet.Count > 0) {
    //  Apply the Seen and Flagged flags to the first message.  bUid is true because the ID
    //  came from a UID search.
    uint uid = msgSet.GetId(0);
    success = imap.StoreFlags(uid,true,"Seen Flagged",1);
    if (success == false) {
        Debug.WriteLine(imap.LastErrorText);
        return;
    }

    Debug.WriteLine("Updated flags on UID " + Convert.ToString(uid));
}

success = imap.Disconnect();
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}