Friday, June 20, 2014

How to use apex:pageMessage in Visualforce Page?

How to use <apex:pageMessage>  in Visualforce Page?

<apex:pageMessage> :
This component should be used for presenting custom messages in the page using the Salesforce pattern for errors, warnings and other types of messages for a given severity. See also the pageMessages component.

This tag supports following attributes:
The detailed description of the information.
A Boolean value that specifies whether sensitive HTML and XML characters should be escaped in the HTML output generated by this component. If you do not specify escape="false", the character escape sequence displays as written. Be aware that setting this value to "false" may be a security risk because it allows arbitrary content, including JavaScript, that could be used in a malicious manner.
An identifier that allows the component to be referenced by other components in the page.
A Boolean value that specifies whether the component is rendered on the page. If not specified, this value defaults to true.
The severity of the message. Values supported are: 'confirm', 'info', 'warning', 'error'
The strength of the message. This controls the visibility and size of the icon displayed next to the message. Use 0 for no image, or 1-3 (highest strength, largest icon).
The summary message.
The title text for the message.

Visualforce Example:

<apex:page standardController="Opportunity" recordSetVar="opportunities" tabStyle="Opportunity" sidebar="false">
    <p>Enter an alphabetic character for the "Close Date," then click Save to see what happens.</p>
    <apex:form >
        <apex:pageBlock >
        <apex:pageMessage summary="This pageMessage will always display. Validation error 
           messages appear in the pageMessages component." severity="warning" strength="3" />
        <apex:pageMessages />
        <apex:pageBlockButtons >
            <apex:commandButton value="Save" action="{!save}"/>
            <apex:pageBlockTable value="{!opportunities}" var="opp">
                <apex:column value="{!}"/>
                <apex:column headerValue="Close Date">
                    <apex:inputField value="{!opp.closeDate}"/>

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