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

Avoiding race conditions


An action function provides a way to submit a form programmatically via a JavaScript function call. When an action function is executed from a JavaScript event handler, the default browser behavior continues once the event handler has completed. If the event handler is attached to a Visualforce component that submits the form, an onclick handler for an <apex:commandLink /> or <apex:commandButton /> component, for example, the default browser behavior is to continue with the form submission. This results in a race condition as to which form submission request will be processed first by the server and will often produce unexpected results.

In this recipe, we will create a Visualforce page to execute a search for accounts matching a user-entered string of characters. When the user clicks on the button to start the search, a JavaScript function is invoked that checks the number of characters entered. If two or more characters have been entered, the search...