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Add a Related Item from a BinData Object

Demonstrates the Chilkat Email.AddRelatedBd method, which adds a related item (such as an inline image) using the contents of a BinData object, and returns the generated Content-ID. This example loads an image into a BinData, adds it, captures the Content-ID, and references it from the HTML body.

Background: This is the binary, Content-ID-based way to embed an inline resource — the right choice for images, whose bytes belong in a BinData rather than a string. Because Chilkat generates the Content-ID, the usual pattern is: add the item first, capture the returned ID, then build the matching <img src="cid:..."> reference from it (done here with a StringBuilder).

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llSuccess = .F.

//  Demonstrates the AddRelatedBd method, which adds a related item (such as an inline image)
//  using the contents of a BinData object, and returns the generated Content-ID.

loEmail = createobject("CkEmail")
loEmail.Subject = "Related image from BinData"

//  Load the image data from a file into a BinData object.
loBdImage = createobject("CkBinData")
llSuccess = loBdImage.LoadFile("qa_data/images/logo.png")
if (llSuccess = .F.) then
    ? loBdImage.LastErrorText
    release loEmail
    release loBdImage
    return
endif

//  Add the image as a related item; capture its generated Content-ID.
lcCid = loEmail.AddRelatedBd("logo.png",loBdImage)
if (loEmail.LastMethodSuccess = .F.) then
    ? loEmail.LastErrorText
    release loEmail
    release loBdImage
    return
endif

//  Reference the related item in the HTML body by its Content-ID.
loSbHtml = createobject("CkStringBuilder")
loSbHtml.Append('<html><body><img src="cid:PLACEHOLDER_CID"/></body></html>')
lnNumReplaced = loSbHtml.Replace("PLACEHOLDER_CID",lcCid)
loEmail.SetHtmlBody(loSbHtml.GetAsString())

? "NumRelatedItems = " + str(loEmail.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.


release loEmail
release loBdImage
release loSbHtml