force.com friday : intro to visualforce

Intro to Visualforce April 11, 2014

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What can you do with Visualforce?

!  Framework to build custom user interfaces

!  Hosted natively on Force.com

!  Build streamlined UX

!  Create internal and public facing pages

!  Customize for different devices

!  Leverage other web technologies

Controller (MVC) Pattern

Model Controller

View

Model View Controller (MVC) Pattern

Your Data Your Logic

Your Interface

Model View Controller (MVC) Pattern

Standard and Custom Object

Visualforce

Standard Controllers and Apex

MVC example

MVC example

!  Visualforce tags

–  100+ standard components

–  Custom components

!  Works with all standard web technologies including:

–  CSS

–  JavaScript

–  HTML

–  Flash

–  Any other Web-Enabled Code

What do standard components look like?

apex: or chatter: prefix

Attributes to define component

Merge field to define attribute (can also be a

string literal in some cases)

<apex:outputField value = �{!Restaurant__c.Address__c}� >

Reference field (using dot notation)

Data binding to objects and class variables

Component name (examples: tables, repeats, forms, etc)

!  Provides access to data

!  Logic for handling UI interaction

!  Standard Controllers

–  Same functionality as standard pages

•  Save, delete, field access etc.

!  Custom Controllers

–  Written in Apex

–  Override standard behavior

–  Controller Extensions

Visualforce Controllers

What do standard components look like?

Standard or custom objects

Defined at the page

level

Custom controller logic to extend

standard controllers

Inherit standard CRUD functionality.

If only using custom controllers, use controller=“controllerName”

<apex:page standardConroller =�Restaurant__c� extensions

> “ext1, ext2� =

How can I customize Visualforce?

The Developer Console

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What else can you do with Visualforce?

Rich user interfaces

Complete web apps

Mashups

Complete web apps

But…

!  Visualforce is NOT your first line of defense

!  Working knowledge of HTML, CSS, and JavaScript is essential

!  Visualforce has limits

Your first line of defense

Proficiency in web technologies

<table> <tr> <td class="header" colspan="2">...</td> </tr> <tr> <td class="sidebar">...</td> <td class="content">...</td> </tr> <tr> <td class="footer" colspan="2">...</td> </tr></table>

Proficiency in web technologies .button { background: #F8F8F8; background: linear-gradient(#F8F8F8, #D4DADC); background: -webkit-linear-gradient(#F8F8F8, #D4DADC); background: -moz-linear-gradient(#F8F8F8, #D4DADC); background: -o-linear-gradient(#F8F8F8, #D4DADC); background: -ms-linear-gradient(#F8F8F8, #D4DADC); filter: progid:DXImageTransform.Microsoft.gradient(...);}

Limits

!  Page Size: 15 MB

!  Viewstate Size 135 KB

If nothing else, remember this…

!  Visualforce is powerful – use it judiciously

!  If you don’t know basic HTML, CSS, and JavaScript concepts, no amount of Visualforce

magic will help you

!  Pay attention to performance at all times

!  If you don’t know… ASK

http://developer.force.com | Boards | Visualforce

If nothing else, remember this…

!  Developer.force.com

!  Bit.ly/IntroVF-pkg

!  Bit.ly/visualforce-workbook

!  Advanced Visualforce Webinar

!  “7 Habits of Highly Efficient Visualforce Pages”

!  “Building the New AppExchange Using Responsive Design”

DF Recorded Sessions

Survey

Your feedback is crucial to the success of our webinar programs. Thank you!

http://bit.ly/forcefriday

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Designs created for Email, Technical Library & Blog

SUBHEAD

Subhead !  Begin implementing designs for blog and articles in staging environment !  Create designs for webinar, calendar and signup page

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