Delphi DLL

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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var
success: Boolean;
email: HCkEmail;

begin
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) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;

//  The attachment's Content-Disposition is now "inline".
Memo1.Lines.Add(CkEmail__getMime(email));

CkEmail_Dispose(email);