apex:messages

All messages that were generated for all components on the current page. If an <apex:message> or <apex:messages> component is not included in a page, most warning and error messages are only shown in the debug log.

This component supports HTML pass-through attributes using the "html-" prefix. Pass-through attributes are attached to the generated <ul> tag. (Each message is contained in a list item.)

Example

<!-- For this example to render properly, you must associate the Visualforce page 
with a valid account record in the URL. 
For example, if 001D000000IRt53 is the account ID, the resulting URL should be: 
https://MyDomain_login_URL/apex/myPage?id=001D000000IRt53
See the Visualforce Developer's Guide Quick Start Tutorial for more information. -->
         

<!-- Page:  -->
<apex:page controller="MyController" tabStyle="Account">
    <apex:messages />
    <apex:form > 
        <apex:pageBlock title="Hello {!$User.FirstName}!">
        This is your new page for the {!name} controller. <br/>
        You are viewing the {!account.name} account.

        <p>Number of Locations: <apex:inputField value="{!account.NumberofLocations__c}" 
            id="Location_validation"/> 
        (Enter an alphabetic character here, then click save to see what happens.) </p>
           
        <p>Number of Employees: <apex:inputField value="{!account.NumberOfEmployees}" 
            id="Employee_validation"/> 
        (Enter an alphabetic character here, then click save to see what happens.) </p>
            <p /> 
        <apex:commandButton action="{!save}" value="Save"/>    
         <p />
        </apex:pageBlock>  
    </apex:form>  
</apex:page>

/*** Controller  ***/
public class MyController {
    Account account;

    public PageReference save() {
    try{
        update account;
    }
    catch(DmlException ex){
        ApexPages.addMessages(ex);
    }
    return null;
    }

    public String getName() { 
        return 'MyController';
    }

    public Account getAccount() {
        if(account == null)
        account = [select id, name, numberofemployees, numberoflocations__c from Account
        where id = :ApexPages.currentPage().getParameters().get('id')];
        return account;

    }
}

Attributes

See Also

• apex:message