Visualforce Developer Guide

Introducing Visualforce
Tools for Visualforce Development
Getting a Quick Start with Visualforce
Customizing the Appearance and Output of Visualforce Pages
Standard Controllers
Standard List Controllers
Custom Controllers and Controller Extensions
Live Controller (Pilot)
Advanced Examples
Overriding Buttons, Links, and Tabs with Visualforce
Using Static Resources
Creating and Using Custom Components
Dynamic Visualforce Bindings
Dynamic Visualforce Components
Integrating Email with Visualforce
Visualforce Charting
Creating Maps with Visualforce
Render Flows with Visualforce
Embed Flows in Visualforce Pages
An Advanced Example of Using <flow:interview>
Set Flow Variable Values from a Visualforce Page
Get Flow Variable Values to a Visualforce Page
Control Whether Users Can Pause a Flow from a Visualforce Page
Customize How Users Resume Paused Flow Interviews
Configure the finishLocation Attribute in a Flow
Customize a Flow’s User Interface
Render Lightning Runtime for Flows in a Visualforce Page
Templating with Visualforce
Developing Salesforce Apps with Visualforce
Adding Visualforce to a Salesforce AppExchange App
Using JavaScript in Visualforce Pages
Communicating Across the DOM with Lightning Message Service
Best Practices
Standard Component Reference
Appendices
Glossary
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Customize How Users Resume Paused Flow Interviews

By default, users can resume their paused interviews from the Paused Interviews component on their home page. If you want to customize how and where users can resume their interviews, use the pausedInterviewId attribute on the <flow:interview> component.
The following example shows how you can resume an interview—or start a new one—from a button on a page layout. When users click Survey Customer from a contact record, the Visualforce page does one of two things, depending on whether the user has any paused interviews for the “Survey Customers” flow.
  • If the user does, it resumes the first one.
  • If the user doesn’t, it starts a new one.

Create the Visualforce and Apex Controller

Because the Visualforce page will be referenced in a contact-specific button, it must use that standard controller. Use a controller extension to add more logic to the page with Apex, which is where the page gets the ID of the interview to resume.

This Apex controller extension performs a SOQL query to get a list of paused interviews. If nothing is returned from the query, getPausedId() returns a null value, and the Visualforce page starts a new interview. If at least one interview is returned from the query, the Visualforce page resumes the first interview in that list.

Reference the Visualforce Page from a Page Layout

To actually expose this Visualforce page to your users, make it available from the Contact page layout.

If you embed the Visualforce page directly in a page layout, every time a user accesses a contact, they automatically resume the first of their paused interviews—possibly unintentionally. It’s better for the user to make the conscious choice to start or resume an interview, so let’s use a custom button.

Tip

First create a custom button for the Contact object that links to the Visualforce page. Use these field values to create the button.
Field Value
Label Survey Customer
Display Type Detail Page Button
Content Source Visualforce Page
Content YourVisualforcePage

Finally, add the button to your Contact page layout.