Unicode C++

Zip an Email's Attachments into One File

Demonstrates the Chilkat Email.ZipAttachments method, which replaces all of an email's attachments with a single Zip file attachment having the specified filename. The original attachments are removed and packed into the Zip. This example adds two attachments and zips them into one.

Background: Bundling multiple attachments into a single .zip keeps a message tidy, compresses the payload, and works around recipients or gateways that limit the number of attachments. Note that the filename here (files.zip) names the attachment inside the message — it is not a path on disk. The reverse operation is UnzipAttachments.

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Unicode C++

#include <CkEmailW.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the ZipAttachments method, which replaces all of an email's attachments
    //  with a single Zip file attachment having the specified filename.  The original
    //  attachments are removed and packed into the Zip.

    CkEmailW email;
    email.put_Subject(L"Zip the attachments");

    email.AddStringAttachment(L"a.txt",L"first attachment");
    email.AddStringAttachment(L"b.txt",L"second attachment");
    wprintf(L"NumAttachments before = %d\n",email.get_NumAttachments());

    //  Replace all attachments with a single Zip attachment named "files.zip".
    success = email.ZipAttachments(L"files.zip");
    if (success == false) {
        wprintf(L"%s\n",email.lastErrorText());
        return;
    }

    wprintf(L"NumAttachments after = %d\n",email.get_NumAttachments());
    }