Apex · Salesforce · Visualforce

How to Display Error/Information messages in Visualforce Pages

Many case user want to display multiple error/warning/information message in the UI(Visualforce Page).  Please find below sample code

Apex Code :

ApexPages.addmessage(new ApexPages.message(ApexPages.Severity.Info, 'Please fill all manfaroty fields.'));
ApexPages.addmessage(new ApexPages.message(ApexPages.Severity.Error, 'Name is manfatory.'));
ApexPages.addmessage(new ApexPages.message(ApexPages.Severity.WARNING, 'Need more information in order to process your file.'));

Visualforce Page:

<apex:pageMessages>

Note : you can use this logic for debugging code also

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