Visualforce Developer Guide

Introducing Visualforce
Tools for Visualforce Development
Getting a Quick Start with Visualforce
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
Global Variables, Functions, and Expression Operators
Security Tips for Apex and Visualforce Development
Apex Classes Used in Visualforce Controllers
ApexPages Class
Action Class
Cookie Class
IdeaStandardController Class
IdeaStandardSetController Class
KnowledgeArticleVersionStandardController Class
Message Class
PageReference Class
PageReference Constructors
PageReference Methods
getAnchor()
getContent()
getContentAsPDF()
getCookies()
getHeaders()
getParameters()
getRedirect()
getRedirectCode()
getUrl()
setAnchor(anchor)
setCookies(cookies)
setRedirect(redirect)
setRedirectCode(redirectCode)
SelectOption Class
StandardController Class
StandardSetController Class
Execution Governors and Limits
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.

getParameters()

Returns a map of the query string parameters for the PageReference; both POST and GET parameters are included. The key string contains the name of the parameter, while the value string contains the value of the parameter.

Signature

public Map<String, String> getParameters()

Return Value

Type: Map<String, String>

Usage

This map can be modified and remains in scope for the PageReference object. For instance, you could do:

1PageReference.getParameters().put('id', myID);

Parameter keys are case-insensitive. For example:

1System.assert(
2    ApexPages.currentPage().getParameters().get('myParamName') ==
3    ApexPages.currentPage().getParameters().get('myparamname'));