[SalesForce] Send Email with Case Email Template

I would like to send an email template ,with merge fields from case, even to a fixed address'test@email.com'.

Template:

Hi, this is case {!Case.CaseNumber}.

Code:

public void sendSingleEmailfromCustomSetting( string TemplateDeveloperName , string ToAddresses){

           EmailTemplate emailTemplate = [select Id, 
                                                 Body  
                                          from EmailTemplate 
                                          where DeveloperName = :TemplateDeveloperName ];

           Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
           email.setToAddresses( toAddresses.split( '[;,]' ) );
           email.setSaveAsActivity(false);
           email.setTargetObjectId(?);
           //Required if using a template
           //Only Users, Contact or Lead allowed for targetObjectId 
           email.setTemplateId(emailTemplate.Id);
           Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email});
}

The problem is that, in order to send a template, i should set email.setTargetObjectId that is only available for contact, lead, or user.

Is there some workaround?

I would like to use a template, avoiding building message body in apex.

Thanks in advantage for any advice.

Best Answer

Create a dummy contact with the name Dummy and the email address you need. The code below should then allow you to get working from there

public void sendSingleEmailfromCustomSetting( string TemplateDeveloperName , string ToAddresses){
  EmailTemplate emailTemplate = [select Id, Body  from EmailTemplate where DeveloperName = :TemplateDeveloperName ];
  contact con=[Select id from contact Where FirstName = 'Dummy' limit 1];
  Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
  mail.setToAddresses( toAddresses.split( '[;,]' ) );
  mail.setSaveAsActivity(false);
  mail.setTargetObjectId(con.Id);
  mail.setSenderDisplayName(‘My Namej’);
  mail.setTemplateId(emailTemplate.id);
  mail.setWhatId(case.id);
  Messaging.sendEmail(new Messaging.SingleEmailMessage[] { mail });
}
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