Delphi ActiveX

Add an Attachment from a BinData Object

Demonstrates the Chilkat Email.AddAttachmentBd method, which adds an attachment using the contents of a BinData object. The first argument is the attachment filename, the second is the BinData, and the third is the content type — if empty, it is inferred from the filename extension. This example loads a PDF into a BinData and attaches it.

Background: BinData is Chilkat's container for raw binary data. Attaching from a BinData is the right approach when the file's bytes are already in memory — generated on the fly, downloaded, or read from a database — rather than sitting on disk (which would use AddFileAttachment). Chilkat Base64-encodes the bytes into the message automatically.

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var
success: Integer;
email: TChilkatEmail;
bd: TChilkatBinData;

begin
success := 0;

//  Demonstrates the AddAttachmentBd method, which adds an attachment using the contents of a
//  BinData object.  The first argument is the attachment filename, the second is the BinData
//  object, and the third is the content type (inferred from the filename extension if empty).

email := TChilkatEmail.Create(Self);
email.Subject := 'Attach from BinData';
email.Body := 'Please see the attached file.';

//  Load a file into a BinData object, then attach it.
bd := TChilkatBinData.Create(Self);
success := bd.LoadFile('qa_data/attachments/report.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(bd.LastErrorText);
    Exit;
  end;

success := email.AddAttachmentBd('report.pdf',bd.ControlInterface,'application/pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(email.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('NumAttachments = ' + IntToStr(email.NumAttachments));

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