Show Error Messages in Visualforce Page Using Custom Controller

Arun Garg   5/28/2017   Comment  

1. I am displaying 5 types of error message her.

2. Display message by creating new instance of ApexPages.message and then adding message to Apexpages using 

     ApexPages.addmessage. Then displaying these messages in visualforce page..

 In the example below, we are showing 5 input fields of account. I have added a button on visualforce page. Different type of message will be shown on visualforce page if we will keep any field blank.

CLICK FOR DEMO

VISUALFORCE PAGE:

<apex:page standardController="Account" extensions="ShowErrorMessage" showHeader="false" sidebar="false">

 <apex:form >

   <apex:pageblock >

      <apex:pageMessages id="showmsg"></apex:pageMessages>

         <apex:panelGrid columns="2">

           Account Name: <apex:inputText value="{!account.name}"/>

           Account Number: <apex:inputText value="{!account.AccountNumber}"/>

           Account Phone: <apex:inputText value="{!account.phone}"/>

           Account Site: <apex:inputText value="{!account.site}"/>

           Account Industry: <apex:inputText value="{!account.industry}"/>

           <apex:commandButton value="Click" action="{!save}"     rerender="showmsg"/>

         </apex:panelGrid>

    </apex:pageblock>

 </apex:form>

</apex:page>

APEX CLASS:

public class ShowErrorMessage{

    public Account account{get;set;}

    public ShowErrorMessage(ApexPages.StandardController controller) {

        account = new Account();

}

public void save()

{

 if(account.name == '' || account.name == null)

    ApexPages.addmessage(new   ApexPages.message(ApexPages.severity.FATAL,'Please     enter Account name'));

if(account.AccountNumber == '' || account.AccountNumber == null)

    ApexPages.addmessage(new ApexPages.message(ApexPages.severity.ERROR,'Please     enter Account number'));

if(account.phone == '' || account.phone == null)

    ApexPages.addmessage(new          ApexPages.message(ApexPages.severity.WARNING,'Please enter Account phone number'));

 if(account.site == '' || account.site == null)

     ApexPages.addmessage(new ApexPages.message(ApexPages.severity.INFO,'Please       enter Account site'));

 if(account.industry == '' || account.industry == null)

    ApexPages.addmessage(new    ApexPages.message(ApexPages.severity.CONFIRM,'Please enter Account industry    detail.'));

   }

}