Unicode C

Set the Content-Disposition of an Attachment

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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Unicode C

#include <C_CkEmailW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkEmailW 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 = CkEmailW_Create();
    CkEmailW_putSubject(email,L"Set attachment disposition");

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

    //  Set the disposition of the first attachment (index 0) to "inline".
    success = CkEmailW_SetAttachmentDisposition(email,0,L"inline");
    if (success == FALSE) {
        wprintf(L"%s\n",CkEmailW_lastErrorText(email));
        CkEmailW_Dispose(email);
        return true;
    }

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


    CkEmailW_Dispose(email);

    }