Adding an attachment to email using C#

Question

I'm using the following code from this answer Sending email in .NET through Gmail. The trouble I'm having is adding an attachment to the email. How would I add an attachment using the code below?

using System.Net.Mail;

var fromAddress = new MailAddress("from@gmail.com", "From Name");
var toAddress = new MailAddress("to@example.com", "To Name");
const string fromPassword = "fromPassword";
const string subject = "Subject";
const string body = "Body";

var smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    UseDefaultCredentials = false,
    Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};
using (var message = new MailMessage(fromAddress, toAddress)
    {
        Subject = subject,
        Body = body
    })
{
    smtp.Send(message);
}

score 127 · Accepted Answer · edited Feb 22 '18 at 09:18

127

The message object created from your new MailMessage method call has a property .Attachments.

For example:

message.Attachments.Add(new Attachment(PathToAttachment));

edited Feb 22 '18 at 09:18

Bridge

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answered Feb 17 '11 at 20:57

JYelton

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This answers is incomplete. What if the attachments is not sitting in the file system, but you have a stream of byte? – barduro Sep 26 '19 at 15:42
4

@barduro The OP did not ask about that particular case. For that, see https://stackoverflow.com/a/2583991/161052 – JYelton Sep 26 '19 at 16:45

score 19 · Answer 2 · answered Feb 17 '11 at 20:56

Using the Attachment class as proposed in the MSDN:

// Create  the file attachment for this e-mail message.
Attachment data = new Attachment(file, MediaTypeNames.Application.Octet);
// Add time stamp information for the file.
ContentDisposition disposition = data.ContentDisposition;
disposition.CreationDate = System.IO.File.GetCreationTime(file);
disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
// Add the file attachment to this e-mail message.
message.Attachments.Add(data);

The "official documentation" on MSDN is pretty sketchy about what an Attachment actually attaches. Just like your example doesn't explain what "file" is or what will be attached if it works. — Suncat2000, Aug 15 '19 at 19:05

score 9 · Answer 3 · answered Apr 30 '13 at 16:48

Correct your code like this

System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment("your attachment file");
mail.Attachments.Add(attachment);

http://csharp.net-informations.com/communications/csharp-email-attachment.htm

hope this will help you.

ricky

score 1 · Answer 4 · answered Jan 05 '21 at 21:30

1

Hint: mail body is overwritten by attachment file path if attachment is added after, so attach first and add body later

mail.Attachments.Add(new Attachment(file));

mail.Body = "body";

answered Jan 05 '21 at 21:30

Hasan Nazeer

61
5

I find no evidence to support this claim. – llessurt Jul 25 '23 at 19:23

score 0 · Answer 5 · edited Sep 23 '17 at 10:46

0

A one line answer:

mail.Attachments.Add(new System.Net.Mail.Attachment("pathToAttachment"));

edited Sep 23 '17 at 10:46

SilverNak

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answered Sep 23 '17 at 09:45

Rob Salmon

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Adding an attachment to email using C#

5 Answers5

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