Unicode C

Convert a MIME Entity to multipart/mixed

Demonstrates the Chilkat Mime.ConvertToMultipartMixed method, which wraps the current entity in a new outer multipart/mixed, making the original the first child. It takes no arguments.

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: This is how you turn an existing single-part message into one that can hold attachments — rather than rebuilding it, you wrap it, and its content becomes the first child of a new multipart/mixed. Message-level and custom headers are carried onto the new outer entity so the message identity is preserved. Afterward, AppendPartFromFile adds attachments beside the original body.

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Unicode C

#include <C_CkMimeW.h>

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

    success = FALSE;

    mime = CkMimeW_Create();
    success = CkMimeW_LoadMimeFile(mime,L"qa_data/message.eml");
    if (success == FALSE) {
        wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
        CkMimeW_Dispose(mime);
        return;
    }

    //  Wrap the current entity in a new outer multipart/mixed entity.  The original entity becomes the
    //  first child, which is what you do to add attachments to an existing single-part message.
    success = CkMimeW_ConvertToMultipartMixed(mime);
    if (success == FALSE) {
        wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
        CkMimeW_Dispose(mime);
        return;
    }

    //  Now attachments can be appended alongside the original content.
    success = CkMimeW_AppendPartFromFile(mime,L"qa_data/report.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
        CkMimeW_Dispose(mime);
        return;
    }

    wprintf(L"Number of parts: %d\n",CkMimeW_getNumParts(mime));


    CkMimeW_Dispose(mime);

    }