Book Image

Visualforce Development Cookbook - Second Edition

By : Keir Bowden
Book Image

Visualforce Development Cookbook - Second Edition

By: Keir Bowden

Overview of this book

Visualforce is a framework that allows developers to build sophisticated, custom user interfaces that can be hosted natively on the Force.com platform. The Visualforce framework includes a tag-based markup language, similar to HTML that is used to write the Visualforce pages and a set of controllers that are used to write business logic to the Visualforce pages. Visualforce Development Cookbook provides solutions to a variety of challenges faced by Salesforce developers and demonstrates how easy it is to build rich, interactive pages using Visualforce. Whether you are looking to make a minor addition to the standard page functionality or override it completely, this book will provide you with the help you require throughout. You will start by learning about the simple utilities and will build up to more advanced techniques for data visualization and to reuse functionality. You will learn how to perform various tasks such as creating multiple records from a single page, visualizing data as charts, using JavaScript to enhance client-side functionality, building a public website, and making data available to a mobile device. With an interesting chapter on tackling common issues faced while developing Visualforce pages, the book provides lots of practical examples to enhance and extend your Salesforce user interface.
Table of Contents (16 chapters)
Visualforce Development Cookbook - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

The custom iterator component


The Visualforce standard component <apex:repeat /> iterates a collection of data and outputs the contained markup once for each element in the collection. In the scenario where this is being used to display a table of data, the markup for the table headings appears before the <apex:repeat /> component and is rendered regardless of whether the collection contains any records or not.

Custom iterator components may contain additional markup to be rendered outside the collection, for example, the headings markup in the scenario mentioned earlier. This allows the component to avoid rendering any markup if the collection is empty through the logic implemented in a custom controller.

In this recipe, we will create a custom component that takes a collection of data and renders a containing page block and a page block section for each element in the collection. If the collection is empty, no markup will be rendered. We will also create a containing page that...