Visualforce - Beyond Basics Series 33 - Show error for any Input fields

Is there any standard way for displaying error message for a field ?

When a controller/extension (Or) Trigger uses addError method in Sobject field, it will be displayed under the field in the Visualforce Page.

What about non-sobject field ?

But, if the input field has binding through a non-sobject variable, then there's no standard way of displaying the error message under  the field.

How to show them ?

The error message has to be displayed manually.

Where is the code ?

I have illustrated by simply adding error message in a map in Controller, Then, in Visualforce page, if there's an error, the error message will be displayed.

	public class testcls33_20122016 {
	Opportunity opp;
	public Map<String, String> errorMap {get; set;}
	public testcls33_20122016(ApexPages.StandardController sc) {
	opp = (Opportunity) sc.getRecord();
	errorMap = new Map<String, String> { 'Name' => '' };
	}
	public void save() {
	errorMap.put('Name', 'Organization locked. Sorry for inconvinience');
	}
	}

view raw gistfile1.txt hosted with ❤ by GitHub

	<apex:page standardController="Opportunity" extensions="testcls33_20122016">
	<apex:form>
	<!-- Input Form -->
	<apex:outputLabel value="Name "/>
	<apex:inputText value="{!Opportunity.Name}"/>
	<!-- Field Error - for Name -->
	<apex:outputText value="{!errorMap['Name']}" style="color:red;"
	rendered="{!errorMap['Name'] != null}"/>
	<br/>
	<!-- Button -->
	<apex:commandButton value="Save" action="{!save}"/>
	</apex:form>
	</apex:page>

view raw gistfile1.txt hosted with ❤ by GitHub

Any screenshot ?

Walk through in video ?