(Delphi ActiveX) Append Part to MIME

Demonstrates the AppendPart method for adding sub-parts to MIME.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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;
ptMime: TChilkatMime;
topLevelMime: TChilkatMime;
ptMime2: IChilkatMime;

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

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

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

// Initialize it to a multipart Content-Type.  We'll use multipart/mixed.
topLevelMime.NewMultipartMixed();

// Append the ptMime as a child.
topLevelMime.AppendPart(ptMime.ControlInterface);
Memo1.Lines.Add(topLevelMime.GetMime());
Memo1.Lines.Add('****');

// The topLevelMime contains:
// --------------------------
// 	Content-Type: multipart/mixed; boundary="------------010907090104040508040404"
// 
// 	--------------010907090104040508040404
// 	Content-Type: text/plain
// 	Content-Transfer-Encoding: 7bit
// 
// 	This is the plain text body
// 	--------------010907090104040508040404--
// 

// IMPORTANT: A copy of the MIME passed in AppendPart is appended.
// Therefore, in this case, changing ptMime does not change the text/plain sub-part in topLevelMime.
// For example:
ptMime.SetBody('this is the new plain text body.');
// topLevelMime is unchanged.
Memo1.Lines.Add(topLevelMime.GetMime());
Memo1.Lines.Add('****');

// To change the content in topLevelMime, we must get the text/plain part.
// For example:
ptMime2 := topLevelMime.GetPart(0);
ptMime2.SetBody('this is the new plain text body.');

// Now topLevelMime is changed.
Memo1.Lines.Add(topLevelMime.GetMime());
end;