Web Forms :: Embed Image In Email Based On URL

I have used Embed image in Email based on [URL]Image will not show in email. But it become an attachment.

public void sendEmail(string mailTo, string mailCC, string contentFileName, Hashtable parameters)
{
string s = Dns.GetHostName();
MailAddress fromAddress = new System.Net.Mail.MailAddress(RPUser.getAppSetting(WEB_SMTP_USER_EMAIL));
System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage();
mailMessage.From = fromAddress;
mailMessage.To.Add(mailTo);
if (mailCC != "")
mailMessage.To.Add(mailCC);
string Body = getMailhtml(contentFileName, parameters);
//mailMessage.Body = Body;
System.Net.Mail.AlternateView htmlView = System.Net.Mail.AlternateView.CreateAlternateViewFromString(Body, null, "text/html");
IDictionaryEnumerator en = parameters.GetEnumerator();
while (en.MoveNext())
{
string parameterStr = en.Key.ToString();
if (parameterStr.Contains("cid:"))
{
//string path = System.Web.HttpContext.Current.Request.Url.AbsoluteUri.Remove(System.Web.HttpContext.Current.Request.Url.AbsoluteUri.LastIndexOf('/') + 1) + en.Value.ToString();
string path = @"D:ProjectsRPPortalBLRPPortal" + en.Value.ToString();
LinkedResource logo = new LinkedResource(path);
logo.ContentId = parameterStr;
htmlView.LinkedResources.Add(logo);
}
}
mailMessage.AlternateViews.Add(htmlView);
if (parameters[EMAIL_SUBJECT] != null) mailMessage.Subject = parameters[EMAIL_SUBJECT].ToString();
mailMessage.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = RPUser.getAppSetting(WEB_SMTP_HOST);
smtp.Port = Convert.ToInt32(RPUser.getAppSetting(WEB_SMTP_PORT));
if (Convert.ToBoolean(RPUser.getAppSetting(WEB_SMTP_SSL)))
smtp.EnableSsl = true;
else
smtp.EnableSsl = false;
smtp.Credentials = new System.Net.NetworkCredential(RPUser.getAppSetting(WEB_SMTP_USERNAME), RPUser.getAppSetting(WEB_SMTP_PASSWORD));
try { smtp.Send(mailMessage); }
catch (Exception) { }
}