"tomb" <t***@technetcenter.com> wrote in message
news:AmoFg.21628$q96.11432@bignews4.bellsouth.net...
> Saeid Bagheri asked a very good question, and I've seen this question here
> before but I have never seen it answered.  Can VB.Net desktop apps utilize
> https?  If so, how?
>
> Tom

>On Fri, 18 Aug 2006 15:18:00 -0400, tomb <t***@technetcenter.com> wrote:
>
> 
>
>>Saeid Bagheri asked a very good question, and I've seen this question
>>here before but I have never seen it answered.  Can VB.Net desktop apps
>>utilize https?  If so, how?
>>
>>Tom
>>   
>>
>
>I asked about this myself some weeks ago in the context of simply wanting to download selected files
>with HTTPS urls using WebClient.  The current Help file talks about how to do this, but leads to an
>example that returns a warning/error that the method is obsolete.  The current Help file (nor MSDN)
>had any example on how to use the suggested replacement method.
>
>For my particular needs, I eventually wound up with this relatively simple method:
>
>Imports System.Net.Security
>Imports System.Security.Crytopgaphy.X509Certificates
>
>Try
>ServicePointManager.ServerCertificateValidationCallback = New _
>RemoteCertificateValidationCallback(AddressOf ValidateCertificate)
>
>WebClient1.DownloadDataAsync(uri)
>
>Catch
>
>
>End Try
>
>    Private Function ValidateCertificate(ByVal sender As Object, _
>        ByVal certificate As X509Certificate, ByVal chain As X509Chain, _
>        ByVal sslPolicyErrors As SslPolicyErrors) As Boolean
>      
>        'Return True to force the certificate to be accepted.
>        Return True
>    End Function
>
>In the above snippet, when the URI contains HTTPS, the certificate is accepted (the user ceritficate
>dialog is not displayed) and the download preceeds.  This works for my specific need in this case,
>but others may want user intereaction with the certificate dialog. 
>
>Gene
> 
>