C++

Attach a File to a Multipart MIME Entity

Demonstrates the Chilkat Mime.AppendPartFromFile method, which reads a local file, creates an attachment part, and appends it. The only argument is the file path; the content headers are chosen from the filename extension.

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 the one-call way to add an attachment: Chilkat reads the file, infers its Content-Type from the extension, base64-encodes binary content, and appends it as a child part — typically inside a multipart/mixed. It is the building block behind adding attachments to an email, saving you from constructing the part and setting its headers by hand.

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C++

#include <CkMime.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the Mime.AppendPartFromFile method, which reads a local file, creates an attachment
    //  part, and appends it.  The only argument is the file path; the content headers are chosen from
    //  the filename extension.

    CkMime mime;
    success = mime.NewMultipartMixed();
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    //  A message body part.
    CkMime bodyPart;
    success = bodyPart.SetBodyFromPlainText("Please see the attached files.");
    if (success == false) {
        std::cout << bodyPart.lastErrorText() << "\r\n";
        return;
    }

    success = mime.AppendPart(bodyPart);
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    //  Attach files directly.
    success = mime.AppendPartFromFile("qa_data/report.pdf");
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    success = mime.AppendPartFromFile("qa_data/photo.jpg");
    if (success == false) {
        std::cout << mime.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Number of parts: " << mime.get_NumParts() << "\r\n";
    }