Remove a Part from a Multipart MIME Entity

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Demonstrates the Chilkat Mime.RemovePart method, which removes the direct child at a zero-based index. The only argument is the index; valid values are 0 through NumParts - 1. An out-of-range index returns false and changes nothing.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: Removing a part is how you strip an attachment or drop an unwanted alternative when reprocessing a message. Because parts are addressed by position, be mindful that removing one shifts the indexes of those after it — when deleting several, iterate from the last index downward so earlier removals do not renumber the parts you still intend to remove.

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    success := false

    mime := chilkat.NewMime()
    success = mime.LoadMimeFile("qa_data/multipart_message.eml")
    if success == false {
        fmt.Println(mime.LastErrorText())
        mime.DisposeMime()
        return
    }

    //  Remove the direct child part at a zero-based index.  Valid indexes are 0 through NumParts - 1.
    //  Here the last part is removed.
    lastIndex := mime.NumParts() - 1
    success = mime.RemovePart(lastIndex)
    if success == false {
        fmt.Println(mime.LastErrorText())
        mime.DisposeMime()
        return
    }

    fmt.Println("Parts remaining: ", mime.NumParts())

    mime.DisposeMime()