public virtual IAsyncResult BeginFetchMail(int messageNumber, AsyncCallback callBack, object state)
{
if (m_CurrentState is DisconnectedState)
{
if (!Connect())
{
return(null);
}
}
if (m_CurrentState is AuthorizationState)
{
if (!Authenticate())
{
return(null);
}
}
RFC1939.RetriveCommand command = new RFC1939.RetriveCommand(m_Stream, messageNumber);
if (IssueCommand(command))
{
ReadMailDelegate readelegate = new ReadMailDelegate(m_MailReader.Read);
return(readelegate.BeginInvoke(ref m_Stream, this, callBack, state));
}
return(null);
}
public IMailMessage EndFetchMail(IAsyncResult result)
{
ReadMailDelegate readDelegate = ((AsyncResult)result).AsyncDelegate as ReadMailDelegate;
this.CurrentState = TransactionState.GetInstance();
if (readDelegate != null)
{
return(readDelegate.EndInvoke(ref m_Stream, result));
}
return(new mime.RFC2045.NullMessage());
}
