Salesforce

Salesforce

How to add error message in Visualforce page?

Sample Code: Visualforce page: <apex:page controller="Sample" sidebar="false" ><apex:pagemessages /><apex:form >    <apex:pageblock >              <apex:pageBlocksection >            <apex:pageblockSectionItem >Name:</apex:pageblockSectionItem>            <apex:pageblockSectionItem ><apex:inputtext value="{!nam}" /></apex:pageblockSectionItem>                      <apex:pageblockSectionItem >Age:</apex:pageblockSectionItem>                      <apex:pageblockSectionItem ><apex:inputtext value="{!age}" /></apex:pageblockSectionItem>                  ....

Salesforce

apex:insert, apex:composition, apex:define

Sample Code: Visualforce pages: Template: <apex:page >    <apex:outputText >Welcome to Accord</apex:outputText><br/><br/>    <apex:insert name="header"/><br/><br/>    <apex:outputtext >We are Pioneer in training students</apex:outputtext><br/><br/>    <apex:insert name="body"/><br/><br/>    <apex:outputtext >Thank You</apex:outputtext></apex:page> Sample: <apex:page sideBar="false">    <apex:composition template="Template">        ....