How to send an email from Apex with a template based on an Event record?

Question

I have been trying to figure out how to send an email from Apex for a template that needs an Event object to work.

In my example below, I want to have a visualforce template that will work off of an Event record. It will have a custom controller for a component within the Visualforce Email Template which will need the Event.Id in order to query the Event and a list of child objects from another object.

Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
email.setToAddresses(new String[] { '[email protected]' });
email.setTargetObjectId(myContact.Id);
email.setTemplateId(mytemplate.Id);

Messaging.SendEmailResult[] results = Messaging.sendEmail(new Messaging.SingleEmailMessage[] { email });

Questions

• I can specify the template id as I have above, but I am not sure how to pass (if it is at all possible) the event id so that it can be used in the template.
• I am also not sure how to specify in the Visualforce Email template that this is an Event driven template.
• In addition, as there are no page parameters for the component controller to pick up the event id from, where does it get the id from?

Thank you

Answer 1

First of all, you are looking for the setWhatId method.

As for your question about type, there is a relatedToType attribute for that in your opening messaging:emailTemplate tag (documentation).

<messaging:emailTemplate recipientType="Contact" relatedToType="Event">

The Event Id comes from setWhatId as mentioned above.