(Delphi DLL) Send HTML Email with Embedded Image Loaded from Memory

Demonstrates how to compose an HTML email with an embedded image where the image data is loaded directly from memory.

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, MailMan, FileAccess, Email, CkByteData, StringBuilder;

...

procedure TForm1.Button1Click(Sender: TObject);
var
fac: HCkFileAccess;
imageBytes: HCkByteData;
mailman: HCkMailMan;
email: HCkEmail;
contentIdStarfish: PWideChar;
sbHtml: HCkStringBuilder;
numReplacements: Integer;
success: Boolean;

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

// First load image data into memory.
// This example loads image data from a file.
// However, your application could get the image data from any other source, such as
// from a database.
fac := CkFileAccess_Create();
imageBytes := CkByteData_Create();
success := CkFileAccess_ReadEntireFile(fac,'qa_data/jpg/starfish.jpg',imageBytes);

// The mailman object is used for sending and receiving email.
mailman := CkMailMan_Create();

// Use your SMTP server hostname.  This example uses office365, but it could be any SMTP server..
CkMailMan_putSmtpHost(mailman,'outlook.office365.com');
CkMailMan_putSmtpPort(mailman,587);
CkMailMan_putStartTLS(mailman,True);

// Set the SMTP login/password
CkMailMan_putSmtpUsername(mailman,'OFFICE365-SMTP-LOGIN');
CkMailMan_putSmtpPassword(mailman,'OFFICE365-SMTP-PASSWORD');

// Create a new email object
email := CkEmail_Create();
CkEmail_putSubject(email,'HTML Email with Image Loaded from In-Memory Bytes');
CkEmail_putFrom(email,'Chilkat Support <my-office365-user@mydomain.com>');
CkEmail_AddTo(email,'Chilkat Support','support@chilkatsoft.com');

contentIdStarfish := CkEmail__addRelatedData(email,'starfish.jpg',imageBytes);
if (CkEmail_getLastMethodSuccess(email) <> True) then
  begin
    Memo1.Lines.Add(CkEmail__lastErrorText(email));
    Exit;
  end;

// The src attribute for the image tag is set to the contentIdStarfish:
sbHtml := CkStringBuilder_Create();
CkStringBuilder_Append(sbHtml,'<html><body><p>This is an HTML email with an embedded image.</p>');
CkStringBuilder_Append(sbHtml,'<p><img src="cid:CONTENT_ID_STARFISH" /></p></body></html>');
numReplacements := CkStringBuilder_Replace(sbHtml,'CONTENT_ID_STARFISH',contentIdStarfish);

CkEmail_SetHtmlBody(email,CkStringBuilder__getAsString(sbHtml));

success := CkMailMan_SendEmail(mailman,email);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
  end
else
  begin
    Memo1.Lines.Add('Mail Sent!');
  end;

CkFileAccess_Dispose(fac);
CkByteData_Dispose(imageBytes);
CkMailMan_Dispose(mailman);
CkEmail_Dispose(email);
CkStringBuilder_Dispose(sbHtml);

end;