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VB.NET UWP/WinRT Examples

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(VB.NET UWP/WinRT) Fetch Oldest/Newest IMAP Email

Emails may be downloaded by sequence number. Assuming the selected mailbox is not empty, the oldest email is at sequence number 1, and the newest email is at sequence number N. The FetchSingle method may be used to download by sequence number.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

Dim imap As New Chilkat.Imap

Dim success As Boolean

'  Anything unlocks the component and begins a fully-functional 30-day trial.
success = imap.UnlockComponent("Anything for 30-day trial")
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  Connect to an IMAP server.
'  Use TLS
imap.Ssl = True
imap.Port = 993
success = Await imap.ConnectAsync("mail.testemail.net")
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  Login
success = Await imap.LoginAsync("***","***")
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  Select an IMAP mailbox
success = Await imap.SelectMailboxAsync("Inbox")
If (success <> True) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


'  After selecting a mailbox, the NumMessages property
'  contains the number of emails in the selected mailbox.
Dim n As Integer
n = imap.NumMessages

If (n > 0) Then


    '  The oldest email is always at sequence number 1.
    Dim isUid As Boolean = False

    Dim oldestEmail As Chilkat.Email
    oldestEmail = Await imap.FetchSingleAsync(1,isUid)
    If (Not (oldestEmail Is Nothing )) Then

        '  Display the From and Subject
        Debug.WriteLine(oldestEmail.FromAddress)
        Debug.WriteLine(oldestEmail.Subject)

        Debug.WriteLine("--")

    End If


    '  The newest email is at sequence number N:
    Dim newestEmail As Chilkat.Email
    newestEmail = Await imap.FetchSingleAsync(n,isUid)
    If (Not (newestEmail Is Nothing )) Then

        '  Display the From and Subject
        Debug.WriteLine(newestEmail.FromAddress)
        Debug.WriteLine(newestEmail.Subject)


    End If


End If


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

 

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