Check if a MIME Entity is multipart/alternative

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Demonstrates the Chilkat Mime.IsMultipartAlternative method, which returns whether the Content-Type is exactly multipart/alternative. It takes no arguments.

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

Background: Recognizing multipart/alternative matters because its children are the same content in different formats — you display one (usually the last renderable), not all of them. That is the opposite of multipart/mixed, where every child is shown.

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#include <C_CkMime.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMime mime;

    success = FALSE;

    //  Demonstrates the Mime.IsMultipartAlternative method, which returns whether the Content-Type is multipart/alternative.  It takes no arguments.

    mime = CkMime_Create();
    success = CkMime_LoadMimeFile(mime,"qa_data/multipart_message.eml");
    if (success == FALSE) {
        printf("%s\n",CkMime_lastErrorText(mime));
        CkMime_Dispose(mime);
        return;
    }

    if (CkMime_IsMultipartAlternative(mime)) {
        printf("This is a multipart/alternative entity.\n");
    }
    else {
        printf("This is not multipart/alternative.\n");
    }



    CkMime_Dispose(mime);

    }