C#

Download an IMAP Message Set

Demonstrates how to read a set of IMAP emails. C#

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 using TLS.
imap.Ssl = true;
imap.Port = 993;
success = imap.Connect("imap.example.com");
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

//  Authenticate
success = imap.Login("email_account_login","email_account_password");
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

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

//  Search for messages with the word "test" in the subject.
bool fetchUids = true;

Chilkat.MessageSet messageSet = new Chilkat.MessageSet();
success = imap.QueryMbx("Subject test",fetchUids,messageSet);
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

//  Download the messages in a single call to FetchMsgSet.
//  
//  This only makes sense if the number of emails to be downloaded is not too large.  
//  For example, you wouldn't want to download 10000 emails in a single call to FetchMsgSet.
//  Why? For two reasons:  (1) It could potentially cause an out-of-memory condition, and 
//  (2) it would take an extremely large amount of time.  The longer the amount of time,
//  the greater the likelihood of some kind of external networking or server problem occuring,
//  and if it happens, then you would need to re-download everything from the beginning again.
//  For large numbers of emails, it's better to loop over the emails in the message set
//  and download/process one at a time as shown here: Download IMAP Messages One at a Time
//  Downloading one message at a time makes it possible to resume the downloads rather than restart the entire operation all over again.

//  If the message set is reasonable in size, you can download all at once using FetchMsgSet:

Debug.WriteLine("Number of messages = " + Convert.ToString(messageSet.Count));

Chilkat.EmailBundle bundle = new Chilkat.EmailBundle();
bool headersOnly = false;
success = imap.FetchMsgSet(headersOnly,messageSet,bundle);
if (success == false) {
    Debug.WriteLine(imap.LastErrorText);
    return;
}

//  Display the Subject and From of each email.
Chilkat.Email email = new Chilkat.Email();
int i = 0;
int numEmails = bundle.MessageCount;
while (i < numEmails) {
    bundle.EmailAt(i,email);

    Debug.WriteLine(email.GetHeaderField("Date"));
    Debug.WriteLine(email.Subject);
    Debug.WriteLine(email.From);
    Debug.WriteLine("--");
    i = i + 1;
}