Delphi ActiveX

Get a Header Attribute of an Attachment

Demonstrates the Chilkat Email.GetAttachmentAttr method, which returns a header-field attribute value from a header field of the Nth attachment. The first argument is the zero-based attachment index, the second names a header field, and the third names an attribute within it. This example reads the filename attribute of the attachment's Content-Disposition header.

Background: A MIME header can have named parameters after its main value, such as Content-Type: text/plain; charset="utf-8"; name="notes.txt". Here charset and name are attributes. GetAttachmentAttr pulls out one named attribute from a chosen header of a specific attachment, sparing you from parsing the raw header string and dealing with quoting or ordering.

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var
email: TChilkatEmail;
fname: WideString;

begin
//  Demonstrates the GetAttachmentAttr method, which returns a header-field attribute value
//  from a header field of the Nth attachment.  The first argument is the zero-based attachment
//  index, the second is the header field name, and the third is the attribute name.

email := TChilkatEmail.Create(Self);
email.Subject := 'Attachment header attribute';

email.AddStringAttachment('notes.txt','Some notes.');

//  Get the "filename" attribute of the attachment's Content-Disposition header (index 0).
fname := email.GetAttachmentAttr(0,'Content-Disposition','filename');
Memo1.Lines.Add('Attachment filename attribute: ' + fname);