Understanding apex:dynamicComponent in Visualforce

The <apex:dynamicComponent> tag allows you to create and render components dynamically at runtime using Apex code. This is useful when the component structure or type needs to be decided programmatically.

Why Use <apex:dynamicComponent>?

• Enables dynamic UI rendering based on logic, user input, or data.
• Useful for reusable components where the structure is not known at design time.
• Allows developers to control layout and behavior dynamically.

Basic Syntax

xmlCopyEdit<apex:page controller="DynamicCompController">
    <apex:dynamicComponent componentValue="{!myComponent}"/>
</apex:page>

Apex Controller Example

apexCopyEditpublic class DynamicCompController {
    public Component.Apex.OutputText myComponent { get; set; }

    public DynamicCompController() {
        myComponent = new Component.Apex.OutputText();
        myComponent.value = 'This is a dynamically generated text!';
    }
}

Use Cases

• Conditional UI Rendering: Display different layouts or components based on user role or input.
• Reusable Page Templates: Build pages that adapt structure based on object type.
• Form Builders or Configurable UIs: Let users design what they want to see.

Important Notes

• Components must be created using Apex’s Component classes (like Component.Apex.OutputText).
• The componentValue attribute should point to an Apex property that returns a Component.Apex object.