Hello drpoalim, 

Thank you for posting in our forum.

The WebNumericEditor does not have such an option but you could use a WebMaskEditor to set an input mask that will show the separators. For example applying a InputMask="#,###,###" would display the value 1 000 000 like this: 1,000,000 and the separators will remain when you start inputting data.

Please refer to the attached sample and let me know if this is what you’re trying to achieve.

Best Regards,

Maya Kirova

Developer Support Engineer

Infragistics, Inc.

http://ko.infragistics.com/support