System.Web.Mail的本身不支持发送一个网页。 但是使用WebRequest类，你可以屏幕抓取网页，并通过生成的HTML字符串MailMessage类。 看下面的代码。

     private void SendMail()
        {
            MailMessage mail = new MailMessage();
            mail.To = "me@mycompany.com";
            mail.From = "you@yourcompany.com";
            mail.Subject = "this is a test email.";
            string url = "http://www.abc.com";
            mail.Body = ConvertHttpContent(url);
            mail.BodyFormat = MailFormat.Html;
            mail.UrlContentBase = url;
            SmtpMail.SmtpServer = "localhost";  //你的邮件服务器
            SmtpMail.Send(mail);
        }
      
        private string ConvertHttpContent(string url)
        {
            WebRequest objRequest = System.Net.HttpWebRequest.Create(url);
            StreamReader sr = new StreamReader(objRequest.GetResponse().GetResponseStream());
            string result = sr.ReadToEnd();
            sr.Close();
            return result;
        }