The Visualforce pages you’ve created so far have been static. In general, Visualforce pages are dynamic—they can display data retrieved from the database, or data that changes depending on who is logged on and viewing the page. They can become dynamic through the use of variables and formulas.
This tutorial introduces you to variables, formulas and the expression language syntax used in Visualforce. Variables typically contain information that you have retrieved from objects in the Force.com database, or which the platform has made available to you—for example, the name of the logged-in user. A number of built-in formulas are available to add functionality to your page—you’ll discover some basic formulas in this tutorial too.
No comments:
Post a Comment