Xbase++

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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LOCAL nSuccess
LOCAL oEmail
LOCAL oBdImage
LOCAL cCid
LOCAL oSbHtml
LOCAL nNumReplaced

nSuccess := 0

//  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.

oEmail := CreateObject("Chilkat.Email")
oEmail:Subject := "Related image from BinData"

//  Load the image data from a file into a BinData object.
oBdImage := CreateObject("Chilkat.BinData")
nSuccess := oBdImage:LoadFile("qa_data/images/logo.png")
IF (nSuccess == 0)
    ? oBdImage:LastErrorText
    oEmail:destroy()
    oBdImage:destroy()
    RETURN
ENDIF

//  Add the image as a related item; capture its generated Content-ID.
cCid := oEmail:AddRelatedBd("logo.png", oBdImage)
IF (oEmail:LastMethodSuccess == 0)
    ? oEmail:LastErrorText
    oEmail:destroy()
    oBdImage:destroy()
    RETURN
ENDIF

//  Reference the related item in the HTML body by its Content-ID.
oSbHtml := CreateObject("Chilkat.StringBuilder")
oSbHtml:Append('<html><body><img src="cid:PLACEHOLDER_CID"/></body></html>')
nNumReplaced := oSbHtml:Replace("PLACEHOLDER_CID", cCid)
oEmail:SetHtmlBody(oSbHtml:GetAsString())

? "NumRelatedItems = " + Str(oEmail: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.

oEmail:destroy()
oBdImage:destroy()
oSbHtml:destroy()