I will start with the RadNumericTextBox
question. For disabling the value change on pressing the down and up keys you could set the IncrementSettings-InterceptArrowKeys
property to "false
As for the other requirement, please refer to the attached sample page and see a sample implementation of such functionality. As you will notice, you could navigate with left, right, up and down array keys.
Hope this helps.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.