Send mail with multiple file attachments using HttpFileCollection without saving it first - asp.net

Question

I want to send email with multiple file attachment.
I use System.Web.Mail.MailMessage, and add all file attachments in HttpFileCollection.
MailMessage msg = new MailMessage();
string body = BodyTextBox.Text;
string smtpServer = "mail.MySite.com";
string userName = "info#Mysite.com";
string password = "***";
int cdoBasic = 1;
int cdoSendUsingPort = 2;
if (userName.Length > 0)
{
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", smtpServer);
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 25);
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", cdoSendUsingPort);
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", cdoBasic);
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", userName);
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", password);
}
msg.To = "doc#Mysite.com";
msg.From = "info#Mysite.com";
msg.Subject = "Sent mail";
msg.Body = body;
if (fileUpload.HasFile)
{
int iUploadedCnt = 0;
HttpFileCollection hfc = Request.Files;
for (int i = 0; i <= hfc.Count - 1; i++) // CHECK THE FILE COUNT.
{
HttpPostedFile hpf = hfc[i];
if (hpf.ContentLength > 0)
{
hpf.SaveAs(Server.MapPath("Uploaded_Files\\") + Path.GetFileName(hpf.FileName));
msg.Attachments.Add(new MailAttachment(Server.MapPath("Uploaded_Files\\") + Path.GetFileName(hpf.FileName)));
}
}
}
msg.BodyEncoding = System.Text.Encoding.UTF8;
SmtpMail.SmtpServer = smtpServer;
SmtpMail.Send(msg);
It is ok, But i don't want to save file in server, I want send a mail without saving it.

Answer 1

Use the System.Net.Mail.Attachment class, instead of the System.Web.Mail.MailAttachment class, and you can use the overload that accepts a Stream as the first argument:
HttpPostedFile hpf = hfc[i];
if (hpf.ContentLength > 0)
{
msg.Attachments.Add(new Attachment(hpf.InputStream, Path.GetFileName(hpf.FileName)));
}