DataFlex

Add an HTML Alternative Body to an Email

Demonstrates the Chilkat Email.AddHtmlAlternativeBody method, which adds an HTML alternative body. Combined with a plain-text body, it produces a multipart/alternative email that offers both representations of the same content. This example sets a plain-text body, adds an HTML alternative, and prints the resulting alternative count.

Background: A well-formed HTML email usually ships two versions of the body: a rich HTML version and a plain-text fallback, wrapped in a multipart/alternative container. The receiving client displays whichever it prefers — modern clients show the HTML, while text-only clients (or spam filters and accessibility tools) use the plain text. Providing both improves deliverability and ensures every recipient can read the message.

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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoEmail
    Boolean iSuccess
    Integer iTemp1

    //  Demonstrates the AddHtmlAlternativeBody method, which adds an HTML alternative body to
    //  the email.  Combined with a plain-text body, this produces a multipart/alternative
    //  email that offers both representations.

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End
    Set ComSubject Of hoEmail To "Plain-text and HTML alternatives"

    //  Start with a plain-text body.
    Send ComSetTextBody To hoEmail "This is the plain-text version of the message." "text/plain"

    //  Add an HTML alternative, creating a multipart/alternative email.
    Get ComAddHtmlAlternativeBody Of hoEmail "<html><body><b>This is the HTML version.</b></body></html>" To iSuccess

    Get ComNumAlternatives Of hoEmail To iTemp1
    Showln "NumAlternatives = " iTemp1


End_Procedure