B4X

Determine the Number of Unseen Email Messages

Demonstrates how to determine how many unseen messages exist in an email account on an IMAP server. B4X

Dim success As Boolean = False

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

Dim imap As ChilkatImap
imap.Initialize("imap")

'  Connect to an IMAP server.
'  Use TLS
imap.Ssl = True
imap.Port = 993
success = imap.Connect("imap.example.com")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Login
success = imap.Login("***", "***")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  After selecting the mailbox. the total number of emails
'  is immediately available:
Dim totalNum As Int = imap.NumMessages
Log("Num messages = " & totalNum)

'  To determine the number of unseen messages, a call
'  to Search is required, which returns the set of UIDs
'  of all unseen messages.

'  We can choose to fetch UIDs or sequence numbers.
Dim fetchUids As Boolean = True
Dim messageSet As ChilkatMessageSet
messageSet.Initialize
success = imap.QueryMbx("UNSEEN", fetchUids, messageSet)
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


Dim numUnseen As Long = messageSet.Count
Log(numUnseen)

Log("UIDs ----")

'  Display the UIDs
Dim i As Int = 0
Do While i < messageSet.Count
    Log(messageSet.GetId(i))
    i = i + 1
Loop

'  Disconnect from the IMAP server.
success = imap.Disconnect