Attach a File to an Email

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Demonstrates the Chilkat Email.AddFileAttachment method, which attaches a file read from the filesystem. It returns the content type Chilkat assigned to the attachment (inferred from the file extension). This example attaches a PDF and prints its detected content type.

Background: Each attachment carries a Content-Type (MIME type) such as application/pdf or image/png that tells the receiving client how to handle it. Chilkat gets this from the file's extension. Because attachment bytes are binary, they are Base64-encoded for transport, which is handled automatically — you simply point AddFileAttachment at a path and the file is read, encoded, and packaged into the message.

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    //  Demonstrates the AddFileAttachment method, which attaches a file read from the
    //  filesystem.  It returns the content type Chilkat assigned to the attachment (based on
    //  the file extension), or returns failure if the file could not be read.

    email := chilkat.NewEmail()
    email.SetSubject("Email with a file attachment")
    email.SetBody("Please see the attached file.")

    //  Attach a file.  The return value is the auto-detected content type.
    contentType := email.AddFileAttachment("qa_data/attachments/report.pdf")
    if email.LastMethodSuccess() == false {
        fmt.Println(email.LastErrorText())
        email.DisposeEmail()
        return
    }

    fmt.Println("Attached content type = ", *contentType)
    fmt.Println("NumAttachments = ", email.NumAttachments())

    //  Note: The path "qa_data/attachments/report.pdf" is a relative local filesystem path,
    //  relative to the current working directory of the running application.

    email.DisposeEmail()