C # Sending email with attachment (image)

Question

My method sends an email using SMTP Relay Server.

Everything works fine (an email is sent), except that the attached file (image) is somehow compressed / does not exist and cannot be extracted from the email.

The method is as follows:

public static bool SendEmail(HttpPostedFileBase uploadedImage) { try { var message = new MailMessage() //To/From address { Subject = "This is subject." Body = "This is text." }; if (uploadedImage != null && uploadedImage.ContentLength > 0) { System.Net.Mail.Attachment attachment; attachment = new System.Net.Mail.Attachment(uploadedImage.InputStream, uploadedImage.FileName); message.Attachments.Add(attachment); } message.IsBodyHtml = true; var smtpClient = new SmtpClient(); //SMTP Credentials smtpClient.Send(message); return true; } catch (Exception ex) { //Logg exception return false; } } 

• UploadedImage is not null.
• ContentLength - 1038946 bytes (correct size).

However, the sent e-mail contains an image as an attachment with the correct file name, although its size is 0 bytes.

What am I missing?

Answer 1

The second parameter to the System.Net.Mail.Attachment constructor is not a file name. This is a type of content . And maybe make sure your stream position is 0 to create an attachment

Answer 2

@ChrisRun,

• You should change the HttpPostedFileBase parameter as byte [], for example. This way you can reuse your class in more places.
• Try changing the filename for ContentType and add MediaTypeNames.Image.Jpeg.

• Also add a use directive to host MailMessage and SmtpClient

    using (var message = new MailMessage { From = new MailAddress(" [e-mail] "), Subject = "This is subject.", Body = "This is text.", IsBodyHtml = true, To = { " [e-mail] " } }) { if (imageFile != null && imageFile.ContentLength > 0) { message.Attachments.Add(new Attachment(imageFile.InputStream, imageFile.ContentType, MediaTypeNames.Image.Jpeg)); } using (var client = new SmtpClient("smtp.gmail.com") { Credentials = new System.Net.NetworkCredential("user", "password"), EnableSsl = true }) { client.Send(message); } } 

Greetings