Get an Attachment's Bytes into a BinData

See more Email Object Examples

Demonstrates the Chilkat Email.GetAttachmentBd method, which copies an attachment's binary data into a BinData object. The first attachment is at index 0. This example adds an attachment and copies its bytes into a BinData, printing the byte count.

Background: This is the safe, binary way to extract an attachment — the counterpart to the text-oriented GetAttachmentString. Because attachments are often binary (PDFs, images, archives), copying the raw bytes into a BinData preserves them exactly, ready to write to a file, hash, or pass to another API without any charset conversion that could corrupt the data.

Chilkat Go Downloads

Download Chilkat for Go

    success := false

    //  Demonstrates the GetAttachmentBd method, which copies an attachment's binary data into a
    //  BinData object.  The first attachment is at index 0.

    email := chilkat.NewEmail()
    email.SetSubject("GetAttachmentBd example")

    email.AddStringAttachment("notes.txt","Some notes stored in the attachment.")

    //  Copy the first attachment's binary data into a BinData object.
    bd := chilkat.NewBinData()
    success = email.GetAttachmentBd(0,bd)
    if success == false {
        fmt.Println(email.LastErrorText())
        email.DisposeEmail()
        bd.DisposeBinData()
        return
    }

    fmt.Println("Attachment size (bytes) = ", bd.NumBytes())

    email.DisposeEmail()
    bd.DisposeBinData()