VB.NET

Get an IMAP Flag from a Downloaded Email

Demonstrates the Chilkat Imap.GetMailFlag method, which returns the state of a named flag for an Email object that was downloaded from the server. The first argument is the Email and the second is the flag name. The return value is 1 if the flag is set, 0 if not, and -1 if the flag is not present. This example iterates a bundle and reports which messages are read vs unread.

Background: When Chilkat downloads a message it records the flags the server reported at fetch time, so you can inspect them locally with GetMailFlag without another round trip. This is the client-side view: it reflects the state as of the download, not necessarily the live state on the server, which other clients could have changed. Use RefetchMailFlags to update an Email object's flags to the current server values.

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Dim success As Boolean = False

'  Demonstrates the Imap.GetMailFlag method, which returns the state of a named flag for an
'  Email object that was downloaded from the server.  The 1st argument is the Email and the
'  2nd is the flag name.  The return value is 1 if the flag is set, 0 if not, and -1 if the
'  flag is not present.

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


Dim msgSet As New Chilkat.MessageSet
success = imap.QueryMbx("ALL",True,msgSet)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


Dim bundle As New Chilkat.EmailBundle
success = imap.FetchMsgSet(True,msgSet,bundle)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


Dim email As New Chilkat.Email
Dim i As Integer
For i = 0 To bundle.MessageCount - 1
    success = bundle.EmailAt(i,email)
    '  Check whether each message has been read (the "Seen" flag).
    Dim seen As Integer = imap.GetMailFlag(email,"Seen")
    If (seen = 1) Then
        Debug.WriteLine(email.Subject & " -- already read")
    End If

ERROR: "}" expected
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