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Pagination using apex:dataTable in Salesforce

Sample Code: Visualforce page: <apex:page Controller="sample" sidebar="false" ><apex:form >    <apex:pageblock id="pg" >        <apex:datatable value="{!mem}" var="m" rules="all" border="1" columnsWidth="100px,100px,100px" cellspacing="8" cellpadding="8" rows="5">            <apex:facet name="footer">Total Number of records: {!count}</apex:facet>             <apex:column value="{!m.Name}">                ....

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Hide and show example using Apex in Salesforce

Sample Code: Visualforce page: <apex:page controller="HideAndShow" sidebar="false" showHeader="false" ><apex:form ><p style="font-weight:800; color:#4C0000;">&nbsp;&nbsp;&nbsp;Click the buttons below to experiment Hide and Show.</p>    <apex:pageBlock title="Block A" rendered="{!abool}">        This is Block A.<br/><br/>            </apex:pageBlock>    ....

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How to display Custom Setting data using Apex in Visualforce page?

Sample Code: Visualforce Page: <apex:page controller="sample" sidebar="false" ><apex:form >    <apex:pageblock >        <apex:pageblockTable value="{!code}" var="c">            <apex:column value="{!c.Name}"/>                    <apex:column value="{!c.Code__c}"/>        </apex:pageblockTable>    </apex:pageblock></apex:form></apex:page> Apex Controller: public class sample{    public List<CountryCodes__c> code {get;set;}   ....

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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>                  ....

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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">        ....

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Enabling and disabling a PageBlockSection in Salesforce

Sample code: Visualforce page: <apex:page controller="Sample" ><apex:form ><apex:pageblock id="pg" >    <apex:pageblockSection columns="1" title="PBS1" rendered="{!pbs1}"  >        <apex:pageblocksectionItem >            <apex:inputCheckbox value="{!pbs1cb1}">                <apex:actionSupport event="onchange" action="{!check}" reRender="pg"/>            </apex:inputCheckbox>        </apex:pageblocksectionItem>        <apex:pageblocksectionItem >            <apex:inputCheckbox value="{!pbs1cb2}">                <apex:actionSupport ....