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Visualforce Cheat Sheet

User Interface

http://developer.force.com

Overview

Visualforce is the Force.com component-based user interface framework. It uses the MVC

pattern, is extensible (you can create your own components), and supports the standard

platform user interface, as well as a completely custom look and feel.

Getting Started

Enable Developer Mode by clicking Your Name | Setup | My Personal Information |

Personal Information | Edit. Select the Development Mode checkbox to enable an inline

Visualforce editor. To create a page, navigate to a URL based on your current instance, like:

https://<instance>.salesforce.com/apex/helloWorld

All Visualforce page markup lies within an <apex:page> tag. Here’s a simple page:

<apex:page showHeader="false">

<h1>Hello World</h1>

</apex:page>

All tags take an optional or required set of attributes, such as showHeader above. Use the

inline editor auto-completion, or the Component Reference, to determine the attributes for

components.

List all Visualforce pages and Apex classes by navigating to Your Name | Setup | Develop.

Example

Visualforce supports auto-generated standard controllers, as well as extensions, to

minimize the amount of coding needed. Here’s an example of a Visualforce page that uses

a custom controller:

<apex:page showHeader="false" controller="Hello">

<apex:form>

<apex:inputText value="{!theText}"/>

<apex:commandButton value="Go">

action="{!action}" reRender="dynamic"/>

</apex:form>

<apex:outputPanel id="dynamic">

{!theText}

</apex:outputPanel>

</apex:page>

This Visualforce page displays an input field and a button labeled Go. When clicked,

it sends the value of the field to the controller, which performs an action on it. Here, it

duplicates the input. The page renders the result using an AJAX update. Here’s the

controller:

public class Hello {

public PageReference action() {

theText = theText + theText;

return null;

}

public String theText {get;set;}

}

Core Tags

Here are core tags that often make up a Visualforce page:

<apex:page> The obligatory outer tag.

<apex:includeScript> A link to a JavaScript library, often in a static resource.

<apex:stylesheet> A link to a CSS stylesheet, often in a static resource.

Template System

Template components let you create Visualforce pages that act as templates, having named

areas—inserts—that must be filled when the template is used.

<apex:insert> Declares a named area that must be defined.

<apex:composition> Adds the defined template.

<apex:define> Provides content for the inserts.

AJAX and JavaScript

The reRender attribute on action tags such as <apex:commandButton> lets you refresh a

part of a page. The following tags provide additional AJAX and JavaScript support:

<apex:actionFunction> Define JavaScript functions to be called from JavaScript code.

<apex:actionPoller> A timer that sends an AJAX update request at specified

interval.

<apex:actionRegion> Defines an area in a page that demarcates which components

should be processed when AJAX requests generate.

<apex:actionStatus> A component that displays the status of an AJAX update

request.

<apex:actionSupport> Adds asynchronous refresh support to a component.

Core Form

Here are the core components used in forms. These should be embedded within a single

<apex:form> component on a page:

<apex:form> Container for input components.

<apex:commandButton> A form button used to submit or reset a form.

<apex:commandLink> An HTML link that performs an action.

<apex:inputCheckbox> An HTML input element of type checkbox.

<apex:inputField> Input element that corresponds to a field on a standard or

custom object.

<apex:inputFile> An input field to upload a file.

<apex:inputHidden> An HTML input element of type hidden.

<apex:inputSecret> An HTML input element of type password.

<apex:inputText> An HTML input element of type text.

<apex:inputTextArea> An HTML input element of type text area.

<apex:selectList> A list of options for radio buttons or checkboxes.

<apex:selectRadio> A set of related radio button input elements, displayed in a table.

<apex:selectOption> A possible value for the <apex:selectCheckboxes> or

<apex:selectList> components.

<apex:selectCheckboxes> A set of related checkbox input elements, displayed in a table.

<apex:selectOptions> A collection of values for the <apex:selectCheckboxes>,

<apex:selectRadio>, or <apex:selectList> components.

Core Output

Mirroring many of the Core Form Components, these components are used for outputting text:

<apex:outputField> A read-only display of a label and value for fields on custom

objects.

<apex:outputLabel> A label for an input or output field.

<apex:outputLink> A link to a URL.

<apex:outputPanel > A set of content that is grouped together, rendered with an

HTML <span> tag, <div> tag, or neither.

<apex:outputText> Displays styled or escaped text in a page.

Tables and Lists Output

These components are used to generate tables or lists by iterating over a collection:

<apex:dataTable> An HTML table.

<apex:column> A single column in a table.

<apex:dataList> An ordered or unordered list of values.

<apex:facet> A placeholder for content that is rendered in a specific part of

the parent component.

<apex:panelGrid> An HTML table element that lays out its components in

consecutive cells.

<apex:panelGroup> A container for multiple child components so that they can be

displayed in a single panelGrid cell.

Miscellaneous HTML

These components generate HTML for embedding flash, iframes and images:

<apex:flash> A Flash movie, rendered with object and embed tags.

<apex:iframe> Creates an iframe in a page.

<apex:image> A graphical image, rendered with an img tag.

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