Null Value Support
Since R1 2017 RadSpinEditor supports null value. In order to enable this functionality it is necessary to set the EnableNullValueInput property to true. Thus, when the text is cleared and RadSpinEditor looses focus, null value will be set. The default Value property is of type int and it cannot be set to null. A new property,called NullableValue, is introduced for this purpose and it can be set to null. The NullableValueChanged event is fired when the NullableValue property is changed.
Simple Data Binding
You can find below a sample code snippet demonstrating how to use the NullableValue property with simple data binding: