Validate null values in web dynpro for Java

Question

Hi guys,
I want to perform a mandatory field value check in a web dynpro input field. I have cretaed an application and want to ensure that user entered values into it, before it can processed further. I do not think there is/are any property avialable for this.
Any help on how to code.
Thanks a lot in advance.
regards
Sam
Message was edited by:
        sameer chilama

Answer 1

Hi,
this is common code for test the Whether the input field is empty then we have to display the error.
Add the attribute in the context.
public void checkMandatory( java.lang.String displayName, java.lang.String fieldContextID )
//@@begin checkMandatory()
IWDMessageManager messageMgr =wdThis.wdGetAPI().getComponent().getMessageManager();
String attributeValue = wdContext.currentContextElement().getAttributeAsText(fieldContextID);
IWDAttributeInfo attributeInfo =wdContext.getNodeInfo().getAttribute(fieldContextID);
if (attributeValue != null)
attributeValue = attributeValue.trim();
if (attributeValue.length() == 0) {
//String fieldLabel = this.wdContext.getNodeInfo().getAttribute(displayName).getSimpleType().getFieldLabel();
messageMgr.reportContextAttributeMessage(wdContext.currentContextElement(),attributeInfo,
IMessageOrderStatusApplication.EMPTY_INPUT,
new Object[] { displayName },
true);
//@@end
in on action write the code like
this.checkMandatory("Please enter the inputvalue","contextattributename");
wdComponentAPI.getMessageManager().raisePendingException();
it you want to add for more input fields
add second contexzt attribute
this.checkMandatory("Please enter the secondinputvalue","contextattributename1");
wdComponentAPI.getMessageManager().raisePendingException();
thanks,
Lohi.