C++

Create a multipart/alternative MIME Entity

Demonstrates the Chilkat Mime.NewMultipartAlternative method, which initializes the object as an empty multipart/alternative entity. It takes no arguments; the alternative representations are then appended.

Background: multipart/alternative holds several renderings of the same content and lets the client pick the best one it can display — the standard way to send an email as both plain text and HTML. Order matters: parts go from least to most preferred, so the plain-text version comes first and the HTML last, and a client shows the last one it understands.

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C++

#include <CkMime.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the Mime.NewMultipartAlternative method, which initializes the object as an empty
    //  multipart/alternative entity, clearing any existing content.  It takes no arguments.

    CkMime mime;

    success = mime.NewMultipartAlternative();
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    //  multipart/alternative holds two representations of the SAME content; the client displays the
    //  last one it can render.  Add a plain-text part, then an HTML part.
    CkMime textPart;
    success = textPart.SetBodyFromPlainText("Hello (plain text version).");
    if (success == false) {
        std::cout << textPart.lastErrorText() << "\r\n";
        return;
    }

    success = mime.AppendPart(textPart);
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    CkMime htmlPart;
    success = htmlPart.SetBodyFromHtml("<html><body><b>Hello</b> (HTML version).</body></html>");
    if (success == false) {
        std::cout << htmlPart.lastErrorText() << "\r\n";
        return;
    }

    success = mime.AppendPart(htmlPart);
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Number of alternatives: " << mime.get_NumParts() << "\r\n";
    }