(VB.NET) Scan for Emails with Attachments and Save Attachments to Files

Scan for emails with attachments and save attachments.

Note: This example requires Chilkat v11.0.0 or greater.

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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 New Chilkat.Imap

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


' Login
success = imap.Login("myLogin","myPassword")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' We can choose to fetch UIDs or sequence numbers.
Dim fetchUids As Boolean = True

' Get the message IDs of all the emails in the mailbox
Dim messageSet As New Chilkat.MessageSet
success = imap.QueryMbx("ALL",fetchUids,messageSet)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Fetch the email headers into a bundle object:
Dim bundle As New Chilkat.EmailBundle
Dim headersOnly As Boolean = True
success = imap.FetchMsgSet(headersOnly,messageSet,bundle)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Scan for emails with attachments, and save the attachments
' to a sub-directory.
Dim fullEmail As New Chilkat.Email
Dim emailHeader As New Chilkat.Email
Dim i As Integer = 0
While i < bundle.MessageCount
    ' The bundle contains email headers..
    bundle.EmailAt(i,emailHeader)

    ' Does this email have attachments?
    ' Use GetMailNumAttach because the attachments
    ' are not actually in the email object because
    ' we only downloaded headers.
    Dim numAttach As Integer = imap.GetMailNumAttach(emailHeader)

    If (numAttach > 0) Then
        ' Download the entire email and save the
        ' attachments. (Remember, we 
        ' need to download the entire email because
        ' only the headers were previously downloaded.

        ' The ckx-imap-uid header field is added when
        ' headers are downloaded.  This makes it possible
        ' to get the UID from the email object.
        Dim uidStr As String = emailHeader.GetHeaderField("ckx-imap-uid")
        Dim uid As Integer = Convert.toInt32(uidStr)

        success = imap.FetchEmail(False,uid,True,fullEmail)
        If (success = False) Then
            Debug.WriteLine(imap.LastErrorText)
            Exit Sub
        End If


        success = fullEmail.SaveAllAttachments("attachmentsDir")

        Dim j As Integer
        For j = 0 To numAttach - 1
            Dim filename As String = imap.GetMailAttachFilename(emailHeader,j)
            Debug.WriteLine(filename)
        Next

    End If


    i = i + 1
End While

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