VB.NET

Get the Number of IMAP Attachments

Demonstrates the Chilkat Imap.GetMailNumAttach method, which returns the number of ordinary attachments on a message. The only argument is the Email. This example fetches only the headers and reports the attachment count.

Background: A header-only fetch downloads no attachment bodies, so the Email object's own downloaded-attachment count can be 0. GetMailNumAttach instead reads the ckx-imap-numAttach metadata, giving the true count — which is what you want when building a message list that shows whether each message has attachments.

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Dim success As Boolean = False

'  Demonstrates the Imap.GetMailNumAttach method, which returns the number of ordinary
'  attachments on a message.  The only argument is the Email.

Dim imap As New Chilkat.Imap

imap.Ssl = True
imap.Port = 993

success = imap.Connect("imap.example.com")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If

success = imap.Login("user@example.com","myPassword")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


success = imap.SelectMailbox("Inbox")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  Fetch only the message headers.  Attachment bodies are NOT downloaded, but the ckx-imap-*
'  metadata describing the attachments is present, so the attachment info methods still work.
Dim headersOnly As Boolean = True
Dim useUid As Boolean = False
Dim seqNum As Integer = 1
Dim email As New Chilkat.Email
success = imap.FetchEmail(headersOnly,seqNum,useUid,email)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


Dim numAttach As Integer = imap.GetMailNumAttach(email)
Debug.WriteLine("This message has " & numAttach & " attachment(s).")

success = imap.Disconnect()
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If