apex:pageMessage Component

The apex:pageMessage component in Visualforce is used to display success messages, error messages, and warning messages to users.

Syntax

The apex:pageMessage component has the following syntax:

<apex:pageMessage strength="string" title="string" severity="string" summary="string" />

Example

To display a success message on a Visualforce page, use the following code:

<apex:pageMessage strength="success" title="Success!" summary="The record has been saved successfully." />

This will display a success message with a title "Success!" and a summary "The record has been saved successfully." on the Visualforce page.

Explanation

The apex:pageMessage component is used to display messages to users. The strength attribute is used to set the type of message, which can be success, info, warning, or error. The title attribute is used to set the title of the message. The summary attribute is used to set the content of the message, and the severity attribute can be used to set the severity of the message.

Use

The apex:pageMessage component is used to display messages to users on a Visualforce page. Use this component to provide feedback to users about the status of their actions. For example, you can display a success message when a record is saved successfully, or an error message when there is an issue with the data entered by the user.

Important Points

• The apex:pageMessage component should be used only once per page.
• The severity attribute is not used in the latest version of Salesforce, and is instead replaced by the strength attribute.
• The strength attribute is used to set the strength of the message, which can be success, info, warning, or error.
• The title and summary attributes are required.

Summary

The apex:pageMessage component in Visualforce is used to display success messages, error messages, and warning messages to users. Use this component to provide feedback to users about the status of their actions. The strength, title, and summary attributes are required, and the severity attribute is not used in the latest version of Salesforce. This component should be used only once per page.