Zero values ​​for integers are not displayed correctly using the Telerik NumericUpDown element

Question

We use the Telerik RadNumericUpDown control (version of 2013) in our application to display and edit both double values ​​and integers; The control works fine for null binary types: it displays nothing for a null value and 0.00 for a value of 0. We want the same behavior for integers, but the control always displays 0 for zero values. I tried setting NullValue to an empty string and null based on the discussion here: http://www.telerik.com/community/forums/silverlight/numericupdown/null.aspx , but this does not solve our problem.

XAML:

<telerik:RadNumericUpDown Value="{Binding Path=Contents, Mode=TwoWay}" NumberDecimalDigits="0" IsEnabled="True" IsEditable="True" IsInteger="True" NullValue="" MinWidth="70" HorizontalAlignment="Left" HorizontalContentAlignment="Left" /> 

The Contents property is a value with a null value.

Any help is appreciated.

Answer 1

Try adding TargetNullValue = '' to the binding, worked for me

  <telerik:RadNumericUpDown Value="{Binding Path=Contents, Mode=TwoWay, TargetNullValue=''}" IsEnabled="True" IsEditable="True" IsInteger="True" NullValue="" MinWidth="70" HorizontalAlignment="Left" HorizontalContentAlignment="Left" />