I used to use CDO to send HTML embedded emails (including images). I can't
seem to get this working using COM Interop. System.Web.Main doesn't seem
allow for embedded graphics. Any ideas? I would really like to role my own
rather than purchasing a 3rd party library.

Tageting a windows forms application in c#. Have attached the old VB6 code
as an example.

thanks,


Private Sub sendMessage(messageTo As String, messageFrom As String,
messageSubject As String, messageBody As String, errorInfo As String,
ClientID As Long)
    Dim iMsg As New cdo.Message
    Dim iConf As New cdo.Configuration
    Dim Flds  As ADODB.Fields
    Set Flds = iConf.Fields

    Flds(cdoSendUsingMethod) = cdoSendUsingPort
    Flds(cdoSMTPServer) = "localhost"
    Flds(cdoSMTPServerPort) = 25
    Flds(cdoSMTPConnectionTimeout) = 30
    Flds(cdoSendUserReplyEmailAddress) = txtFrom
    Flds(cdoSendEmailAddress) = txtFrom
    Flds.Update

    Set iMsg.Configuration = iConf

    iMsg.To = messageTo
    iMsg.subject = messageSubject
    iMsg.AutoGenerateTextBody = True
    iMsg.TextBody = messageBody
    iMsg.CreateMHTMLBody txtHTMLurl, cdoSuppressNone
    iMsg.Send

Hi Andrew,

Create an interop assembly for the CDO library used by the VB6 code,
reference it from your C# project and then just port the VB code to C#.
P.S. You will have to create an interop assembly for ADODB as well.

Show quoteHide quote

Hi Dmitriy,

No sure whether the problem is something incorrect when you interop call
your vb6 COM dll.
Can you correctly use CDO component directly to send mail in .net
application through COM interop? From my local test , I can successfully
use CDO to send html mails with embeded images in a winform app. Here is
the test code:

=========================
private void btnSendCDO_Click(object sender, System.EventArgs e)
{
    try
    {
        CDO.Message msg = new CDO.MessageClass();

        msg.To = txtEmail.Text;

        msg.Subject = "Test Image Mail";
        msg.From = "Alaindel***@gmail.com";

msg.CreateMHTMLBody("http://www.asp.net",CDO.CdoMHTMLFlags.cdoSuppressNone,"
","");

        CDO.Configuration config = new CDO.ConfigurationClass();

        ADODB.Fields fields = null;

        fields = config.Fields;

        ADODB.Field field = null;

        field =
fields["http://schemas.microsoft.com/cdo/configuration/sendusing"];
        field.Value = 1;

        field =
fields["http://schemas.microsoft.com/cdo/configuration/sendusing"];
        field.Value = CDO.CdoPostUsing.cdoPostUsingPort;

        field =
fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"];
        field .Value = "smtphost";


        fields.Update();
        msg.Configuration = config;
        msg.Send();


        msg = null;
        config = null;
        fields = null;
        field = null;

    }
    catch(Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }

}
=====================================

HTH.

Thanks & Regards,

Steven Cheng
Microsoft Online Support

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