History related lists in visual force

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}"/>