Visualforce - Beyond Basics Series 36 - Action for Lookup Dialog

What is Lookup dialog ?

All parent relationship field which is of type lookup can be changed using the standard inputField tag on them.

How can we take action after the Lookup ?

When user selects some value for the parent relationship, we may need to take some action, perhaps a validation (or) confirmation action to the user.

Where it will be useful ?

We could use this for validation purposes or rendering different section of the page based on the value selected, etc.

Where is the Code ?

The code will illustrate how to take action after the lookup value changed & update different section of the page based on the new selected value.

	public class testcls36_22122016 {
	Opportunity opp;
	public testcls36_22122016(ApexPages.StandardController sc) {
	opp = (Opportunity) sc.getRecord();
	}
	public void changeAccount() {
	opp.Account.Name = [Select
	Id, Name
	From
	Account
	Where
	Id =: opp.AccountId
	][0].Name;
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

	<apex:page standardController="Opportunity" extensions="testcls36_22122016">
	<apex:form>
	<!-- Action for a change in lookup field -->
	<apex:sectionHeader title="Change Account to reflect in Account Details"/>
	<apex:outputLabel value="Opportunity Name"/>
	<apex:inputField value="{!Opportunity.AccountId}">
	<apex:actionSupport event="onchange" action="{!changeAccount}" reRender="AccountName"/>
	</apex:inputField>
	</apex:form>
	<!-- Account Details -->
	<apex:sectionHeader title="Account Details"/>
	<apex:outputText value="Account Name is {!Opportunity.Account.Name}" id="AccountName"/>
	</apex:page>

view raw gistfile1.txt hosted with ❤ by GitHub

Any Screenshots ?

When loaded

After lookup

After value changed

Walk through in a video ?