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 <CkMimeW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkMimeW mime;
    success = mime.LoadMimeFile(L"qa_data/message.eml");
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        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 = mime.ConvertToMultipartMixed();
    if (success == false) {
        wprintf(L"%s\n",mime.lastErrorText());
        return;
    }

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

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