You cannot add your own client-side validation scripting in Web Dynpro but you can assign an action to the "onChange" event of an input field or you can implement input field suggestion. A tutorial is part of the Web Dynpro Demokit, see top of forum.
My requirement is we have a form with 4 fields. So when the user enters some data in the first field. After the first field loses its focus or the user comes to next field it should display an error message if validation fails. Similarly for all the fields. Normally, we do validation after filling the form and hitting some action but here I need to do the validation without interaction with the server.
What exactly is your requirement? According to my knowledge, input validation is already been made asynchronous from CE 7.1 onwards.
The onChange event should process your request as soon as the focus is removed from your control
Edit: See this blog for more info (about halfway) /people/oliver.mayer/blog/2008/11/17/web-dynpro-java-and-ajax-in-sap-netweaver-ce-71-enhancement-package-1
Edited by: Robin van het Hof on Apr 12, 2011 11:39 AM
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