Delphi ActiveX
Create multipart/alternative MIME

Demonstrates how to create a multipart/alternative MIME structure using the NewMultipartAlternative method.
Chilkat Delphi ActiveX Downloads

Delphi ActiveX
uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
mime: TChilkatMime;
ptMime: TChilkatMime;
htmlMime: TChilkatMime;

begin
success := 0;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Start with an empty MIME object...
mime := TChilkatMime.Create(Self);

// Initialize it as multipart/alternative.
mime.NewMultipartAlternative();

// Create a text/plain part.
ptMime := TChilkatMime.Create(Self);
ptMime.SetBodyFromPlainText('This is the plain text body.');
Memo1.Lines.Add(ptMime.GetMime());
Memo1.Lines.Add('****');

// The text/plain part looks like this:

// 	Content-Type: text/plain
// 	Content-Transfer-Encoding: 7bit
// 
// 	This is the plain text body.

// Create a text/HTML part.
htmlMime := TChilkatMime.Create(Self);
htmlMime.SetBodyFromHtml('<html><body><p>This is the <b>HTML body</b></p></body></html>');
Memo1.Lines.Add(htmlMime.GetMime());
Memo1.Lines.Add('****');

// The text/html part looks like this:

// 	Content-Type: text/html
// 	Content-Transfer-Encoding: 7bit
// 
// 	<html><body><p>This is the <b>HTML body</b></p></body></html>

// Add both parts as children of the multipart/alternative
mime.AppendPart(ptMime.ControlInterface);
mime.AppendPart(htmlMime.ControlInterface);
Memo1.Lines.Add(mime.GetMime());

// This the result.  The boundary string was automatically generaetd.

// 	Content-Type: multipart/alternative; boundary="------------080803090906030708030908"
// 
// 	--------------080803090906030708030908
// 	Content-Type: text/plain
// 	Content-Transfer-Encoding: 7bit
// 
// 	This is the plain text body.
// 	--------------080803090906030708030908
// 	Content-Type: text/html
// 	Content-Transfer-Encoding: 7bit
// 
// 	<html><body><p>This is the <b>HTML body</b></p></body></html>
// 	--------------080803090906030708030908--
end;