Set the Content-Disposition of an Attachment

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Demonstrates the Chilkat Email.SetAttachmentDisposition method, which sets the Content-Disposition value for the attachment at a given zero-based index. The default disposition is attachment. This example changes an attachment's disposition to inline.

Background: The Content-Disposition header hints how a client should present a part: attachment means "offer it as a download," while inline means "display it within the message" (as an email client does with an embedded image). Setting it lets you control that behavior — though clients ultimately decide how to honor the hint.

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#include <C_CkEmail.h>

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

    success = FALSE;

    //  Demonstrates the SetAttachmentDisposition method, which sets the Content-Disposition
    //  value for the attachment at the given zero-based index.  The default disposition is
    //  "attachment".

    email = CkEmail_Create();
    CkEmail_putSubject(email,"Set attachment disposition");

    CkEmail_AddStringAttachment(email,"image.txt","(pretend inline content)");

    //  Set the disposition of the first attachment (index 0) to "inline".
    success = CkEmail_SetAttachmentDisposition(email,0,"inline");
    if (success == FALSE) {
        printf("%s\n",CkEmail_lastErrorText(email));
        CkEmail_Dispose(email);
        return;
    }

    //  The attachment's Content-Disposition is now "inline".
    printf("%s\n",CkEmail_getMime(email));


    CkEmail_Dispose(email);

    }