if
(FileUpload1.HasFile)
{
string toAddress
= "to_mailid";
string
fromAddress = "your_mailid";
string mailServer
= "smtp.smtpservername.com";
MailMessage
myMailMessage = new MailMessage();
myMailMessage.To.Add(toAddress);
myMailMessage.From = new MailAddress(fromAddress);
myMailMessage.Subject = "Test Message";
string fileName =
Path.GetFileName(FileUpload1.PostedFile.FileName);
Attachment
myAttachment = new Attachment(FileUpload1.FileContent,fileName);
myMailMessage.Attachments.Add(myAttachment);
SmtpClient
mySmtpClient = new SmtpClient(mailServer);
mySmtpClient.Send(myMailMessage);
}