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

Attaching an image to a record


Associating an image with a record is a common requirement while implementing Salesforce, for example, adding a photo to a contact or a custom news story sObject. Using the standard attachments functionality creates a disconnect between the record and the image, requiring additional clicks to view the image, and often relying on the user following a naming convention when uploading the file.

In this recipe, we will create a Visualforce page to allow a user to attach an image to a contact record. The page also displays the image if one has been uploaded. This page will be embedded into the standard contact page layout.

Note

While the size limit for record attachment in Salesforce is 5 MB, as the attachment in this recipe is rendered on a Visualforce page, it is important to keep the size of the file as small as possible to avoid lengthy download times and excessive bandwidth usage.

Getting ready

This recipe makes use of a controller extension, so this will need to...