Visualforce Developer Guide

Introducing Visualforce
Tools for Visualforce Development
Getting a Quick Start with Visualforce
Compile Visualforce Successfully
Creating Your First Page
Displaying Field Values with Visualforce
Using the Visualforce Component Library
Override an Existing Page with a Visualforce Page
Redirecting to a Standard Object List Page
Using Input Components in a Page
Adding and Customizing Input Field Labels
Setting the Tab Order for Fields in a Form
Adding Dependent Fields to a Page
Create Visualforce Dashboard Components
Displaying Related Lists for Custom Objects
Enabling Inline Editing
Converting a Page to a PDF File
Building a Table of Data in a Page
Editing a Table of Data in a Page
Using Query String Parameters in a Page
Getting Query String Parameters
Setting Query String Parameters in Links
Getting and Setting Query String Parameters on a Single Page
Use Ajax in a Page
Put Visualforce Pages on External Domains
Customizing the Appearance and Output of Visualforce Pages
Standard Controllers
Standard List Controllers
Custom Controllers and Controller Extensions
Advanced Examples
Override Buttons, Links, and Tabs with Visualforce
Using Static Resources
Creating and Using Custom Components
Dynamic Visualforce Bindings
Dynamic Visualforce Components
Integrate Email with Visualforce
Visualforce Charting
Creating Maps with Visualforce
Render Flows with Visualforce
Templating with Visualforce
Developing Salesforce Apps with Visualforce
Adding Visualforce to a Salesforce AppExchange App
Using JavaScript in Visualforce Pages
Communicating Across the DOM with Lightning Message Service
Visualforce Best Practices
Standard Visualforce Component Reference
Appendices
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Setting Query String Parameters in Links

You can set query string parameters in links to pages by constructing the link URL manually, or by using <apex:param> tags within the <apex:outputLink> tag. For example, both of the following examples create identical links to an external page:

1<apex:outputLink value="http://google.com/search?q={!account.name}">
2    Search Google
3</apex:outputLink>
1<apex:outputLink value="http://google.com/search">
2    Search Google
3    <apex:param name="q" value="{!account.name}"/>
4</apex:outputLink>

The latter method, which uses <apex:param> tags instead of manually creating the URL, is preferable for stylistic reasons.

In addition to <apex:outputLink>, use <apex:param> to set request parameters for <apex:commandLink>, and <apex:actionFunction>.

Note