Attach a File with an Explicit Content Type

See more Email Object Examples

Demonstrates the Chilkat Email.AddFileAttachment2 method, which attaches a file from the filesystem and lets you explicitly specify its content type rather than having Chilkat infer it from the file extension. This example attaches a binary file as application/octet-stream.

Background: Extension-based type detection is convenient but not always right — a file may have an unusual or missing extension, or you may need a very specific MIME type for the recipient to process it correctly. Specifying the content type explicitly removes the guesswork. application/octet-stream is the generic "arbitrary binary data" type, a safe default that tells the client to treat the attachment as an opaque download rather than trying to render it.

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#include <C_CkEmail.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkEmail email;

    success = FALSE;

    //  Demonstrates the AddFileAttachment2 method, which attaches a file and lets you
    //  explicitly specify its content type instead of letting Chilkat infer it.

    email = CkEmail_Create();
    CkEmail_putSubject(email,"Email with a file attachment");
    CkEmail_putBody(email,"Please see the attached file.");

    //  Attach a file, explicitly specifying the content type.
    success = CkEmail_AddFileAttachment2(email,"qa_data/attachments/data.bin","application/octet-stream");
    if (success == FALSE) {
        printf("%s\n",CkEmail_lastErrorText(email));
        CkEmail_Dispose(email);
        return;
    }

    printf("NumAttachments = %d\n",CkEmail_getNumAttachments(email));

    //  Note: The path "qa_data/attachments/data.bin" is a relative local filesystem path,
    //  relative to the current working directory of the running application.


    CkEmail_Dispose(email);

    }