Add a Related Item from BinData by Content-Location

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Demonstrates the Chilkat Email.AddRelatedBd2 method, which adds a related item using the binary data in a BinData object, addressed by Content-Location. The second argument specifies the filename, path, or URL used by the corresponding HTML reference. This example embeds an image referenced as logo.png.

Background: This is the binary counterpart of AddRelatedString2 and the Content-Location sibling of AddRelatedBd. Instead of a generated cid: reference, the HTML keeps an ordinary src="logo.png" and the related part is matched to it by name — convenient when turning an existing web page into an email so its original relative URLs keep working.

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    success := false

    //  Demonstrates the AddRelatedBd2 method, which adds a related item using the binary data in
    //  a BinData object, addressed by Content-Location.  The second argument specifies the filename/path/URL
    //  used by the corresponding HTML reference.

    email := chilkat.NewEmail()
    email.SetSubject("Related image from BinData (Content-Location)")

    //  The HTML references the image by the same name used as the Content-Location.
    email.SetHtmlBody("<html><body><img src=\"logo.png\"/></body></html>")

    //  Load the image data from a file into a BinData object.
    bdImage := chilkat.NewBinData()
    success = bdImage.LoadFile("qa_data/images/logo.png")
    if success == false {
        fmt.Println(bdImage.LastErrorText())
        email.DisposeEmail()
        bdImage.DisposeBinData()
        return
    }

    //  Add the image as a related item addressed by Content-Location "logo.png".
    success = email.AddRelatedBd2(bdImage,"logo.png")
    if success == false {
        fmt.Println(email.LastErrorText())
        email.DisposeEmail()
        bdImage.DisposeBinData()
        return
    }

    fmt.Println("NumRelatedItems = ", email.NumRelatedItems())

    //  Note: The path "qa_data/images/logo.png" is a relative local filesystem path,
    //  relative to the current working directory of the running application.

    email.DisposeEmail()
    bdImage.DisposeBinData()