Delphi DLL

Attach a File to an Email

Demonstrates the Chilkat Email.AddFileAttachment method, which attaches a file read from the filesystem. It returns the content type Chilkat assigned to the attachment (inferred from the file extension). This example attaches a PDF and prints its detected content type.

Background: Each attachment carries a Content-Type (MIME type) such as application/pdf or image/png that tells the receiving client how to handle it. Chilkat gets this from the file's extension. Because attachment bytes are binary, they are Base64-encoded for transport, which is handled automatically — you simply point AddFileAttachment at a path and the file is read, encoded, and packaged into the message.

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var
email: HCkEmail;
contentType: PWideChar;

begin
//  Demonstrates the AddFileAttachment method, which attaches a file read from the
//  filesystem.  It returns the content type Chilkat assigned to the attachment (based on
//  the file extension), or returns failure if the file could not be read.

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

//  Attach a file.  The return value is the auto-detected content type.
contentType := CkEmail__addFileAttachment(email,'qa_data/attachments/report.pdf');
if (CkEmail_getLastMethodSuccess(email) = False) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;

Memo1.Lines.Add('Attached content type = ' + contentType);
Memo1.Lines.Add('NumAttachments = ' + IntToStr(CkEmail_getNumAttachments(email)));

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

CkEmail_Dispose(email);