apex:commandButton Component

The apex:commandButton component is a Visualforce component in Salesforce that creates a button on a page to run an Apex action method. It is used to execute a specific action defined in an Apex controller when the user clicks on the button.

Syntax

The syntax for apex:commandButton in Visualforce page is as follows:

<apex:commandButton value="Button Label" action="{!controllerMethod}" />

• value: Specifies the label of the button.
• action: Specifies the name of the controller method to invoke when the button is clicked.

Example

Consider the following example:

<apex:page controller="MyController">
  <apex:form >
     <apex:commandButton value="Click Me" action="{!doAction}" />
  </apex:form>
</apex:page>

In the above example, when the user clicks on the "Click Me" button, the doAction method in the MyController controller is executed.

Explanation

The apex:commandButton component is used to create a button on a Visualforce page that executes a specific action defined in the associated Apex controller. When the user clicks on the button, the specified action is invoked.

Use

The apex:commandButton component is used to create a button that performs a specific action when clicked. It can be used for various scenarios such as submitting a form, saving data, or navigating to another page.

Important Points

• The apex:commandButton component must be enclosed within an apex:form component to work properly.
• The action attribute must refer to a valid method in the controller or extension class.
• The rerender attribute can be used to refresh specific portions of the page after the apex:commandButton action has been executed.

Summary

The apex:commandButton component in Salesforce is used to create a button on a Visualforce page that executes a specific action defined in the associated Apex controller. It is commonly used to submit a form or save data in a Salesforce application. The apex:commandButton must be enclosed within an apex:form component and the action attribute must refer to a valid method in the controller or extension class. The rerender attribute can be used to refresh specific portions of the page after the apex:commandButton action has been executed.