The server-side OnNumericTextBoxValueChanged event occurs when the user changes the value in the NumericTextBox, causing a postback.
The event handler function receives two arguments:
The RadRibbonBar which has fired the event. This argument is of type object, but can be cast to the RadRibbonBar type.
An EventArgs object.This object has a number of properties for handling the request for the items:
Value– the new value of the NumericTextBox.
NumericTextBox – the NumericTextBox which fired the event.
Group – the group in which the DropDown is placed.