Hello,
here's a piece of code of custom module that modity ordersummary.ascx to send e-mail to website owner with custom data and summary of products in cart:
1) retrieve data from rptShoppingCart :
foreach (RepeaterItem item in rptShoppingCart.Items)
{
var lblname = item.FindControl("lblname") as Label;
Label1.Text += lblname.Text;
}
2) Send e-mail with fill in data + Label1.Text using MessageManager.SendEmail
It works