Issue – To display the History related lists in visual force
Solution – We can make use of the standard history relationship to display the history related lists in visual force without controller.
Code: To display the Account History Related lists,
<apex: page standard Controller=”Accounts”>
<!—Displays Accounts History Related lists -- >
<apex:dataTable value="{!Account.histories}" var="accountHistory" width="100%">
<!—Displays Created Date of the Field History -- >
<apex:column>
<apex:facet name="header">Date</apex:facet>
<apex:outputText value="{0,date,MM/dd/yyyy HH:mm }">
<apex:param value="{!accountHistory.createddate}" />
</apex:outputText>
</apex:column>
<!—Displays the corresponding field -- >
<apex:column >
<apex:facet name="header">Field</apex:facet>
<b> <apex:outputText value="{!IF(CONTAINS(accountHistory.field,'__c'),LEFT(accountHistory.field, LEN(accountHistory.field) -3),accountHistory.field)}"/></b>
</apex:column>
<!—Displays Edited By User-- >
<apex:column >
<apex:facet name="header">Edited By</apex:facet>
<apex:outputText value="{!accountHistory.createdby.name}"/>
</apex:column>
<!—Displays Old value of the field -- >
<apex:column >
<apex:facet name="header">Old Value</apex:facet>
<apex:outputText value="{!accountHistory.oldvalue}"/>
</apex:column>
<!—Displays New Value of the field -- >
<apex:column >
<apex:facet name="header">New Value</apex:facet>
<apex:outputText value="{!accountHistory.newvalue}"/>
</apex:column>
</apex:datatable>
</apex:pageblock>
</apex:page>
Issue – To display the HelpText for a field in visualforce
Solution: We can make use of “inlineHelpText” to display the helptext of a field in visualforce
Sample Code: To display the Help Text for Account Industry field,
<apex:outputText value=” {!$ObjectType.Account.Fields.Industry.inlineHelpText}"/>
