Question

Does anyone have an example of being able to send an email with an attachment where the attachment is saved as utf8 encoding. I have tried but when i open it in notepad it says the encoding is ascii. Note: that i dont want to save the file first.

// Init the smtp client and set the network credentials
            SmtpClient smtpClient = new SmtpClient();
            smtpClient.Host = getParameters("MailBoxHost");

            // Create MailMessage
            MailMessage message = new MailMessage("[e-mail]",toAddress,subject, body);

            using (MemoryStream memoryStream = new MemoryStream())
            {
                byte[] contentAsBytes = Encoding.UTF8.GetBytes(attachment);
                memoryStream.Write(contentAsBytes, 0, contentAsBytes.Length);

                // Set the position to the beginning of the stream.
                memoryStream.Seek(0, SeekOrigin.Begin);

                // Create attachment
                ContentType contentType = new ContentType();
                contentType.Name = attachementname;
                contentType.CharSet = "UTF-8";

                System.Text.Encoding inputEnc = System.Text.Encoding.UTF8;

               Attachment attFile = new Attachment(memoryStream, contentType);

                // Add the attachment
                message.Attachments.Add(attFile);

                // Send Mail via SmtpClient
                smtpClient.Send(message);


            }

Answer 1

Add the BOM (byte order mark) for UTF-8 at the beginning of the stream:

0xEF,0xBB,0xBF

Code:

byte[] bom = { 0xEF, 0xBB, 0xBF };
memoryStream.Write(bom, 0, bom.Length);

byte[] contentAsBytes = Encoding.UTF8.GetBytes(attachment);
memoryStream.Write(contentAsBytes, 0, contentAsBytes.Length);