Development tools : XUI editor : Editing an XUI page : Editing the properties of the XUI widgets : Defining cross-field validation in a form : xValidationErrorHandler interface
  
xValidationErrorHandler interface
You can implement the xValidationErrorHandler interface to handle the x-validation errors.
public interface xValidationErrorHandler {
public void handleError {Exception e, ChannelContext channelCtx, PresentationHandler prsentHandler) ;}
}
You can define xValidationErrorHandler in btt.xml > ChannelHandler > HTML.
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If xValidationErrorHandler is not defined in btt.xml > ChannelHandler > HTML, the default handler will be used for server side x-Validation error. The default behavior is to render UDTT error page and print error in browser and in log file.
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Defining cross-field validation in a form