Unicode C

Access a Part in a Multipart MIME Entity

Demonstrates the Chilkat Mime.PartAt method, which provides live access to the direct child at a zero-based index. The first argument is the index and the second is a Mime object that will reference the child. Modifying it modifies the child stored in the parent tree.

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 reach into a multipart message to inspect or edit an individual part — read a part's Content-Type, extract an attachment's body, or change a part in place. The key point is that the returned Mime is a live reference, not a copy, so edits to it flow back into the parent tree. Loop from 0 to NumParts - 1 to visit every direct child.

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Unicode C

#include <C_CkMimeW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMimeW mime;
    int n;
    HCkMimeW part;
    int i;

    success = FALSE;

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

    //  PartAt provides LIVE access to a direct child part.  The 1st argument is the zero-based index
    //  and the 2nd is a Mime object that will reference the child.  Modifying it modifies the child in
    //  the parent tree.
    n = CkMimeW_getNumParts(mime);
    wprintf(L"Number of parts: %d\n",n);

    part = CkMimeW_Create();

    for (i = 0; i <= n - 1; i++) {
        success = CkMimeW_PartAt(mime,i,part);
        if (success == FALSE) {
            wprintf(L"%s\n",CkMimeW_lastErrorText(mime));
            CkMimeW_Dispose(mime);
            CkMimeW_Dispose(part);
            return;
        }

        wprintf(L"Part %d Content-Type: %s\n",i,CkMimeW_contentType(part));
    }



    CkMimeW_Dispose(mime);
    CkMimeW_Dispose(part);

    }