Home / Community & Support / Developer Productivity Tools Forums / WPF > NumericUpDown > UpdateSourceTrigger=PropertyChanged doesn't change Value when typing

• Maks

  Posted on Dec 23, 2010 (permalink)

  Hello,
  
  I need to validate numericUD value when typing, so i have the following code:
  

  <telerik:RadNumericUpDown HorizontalAlignment="Center"

                          Value="{Binding Path=AdditionalCosts,Mode=TwoWay,

                   UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"

                          IsEditable="True" AutoReverse="False" Minimum="0"

                    SmallChange="1" LargeChange="5" ValueFormat="Numeric" IsInteger="True" />

  
  But it doesn't call setter when i type (only when i click up/down arrows). What should i do to allow numericUD call setter of AdditionalCosts property when i type?
  
  Thanks.

  Reply

• Answer Boyan Boyan

  Posted on Dec 27, 2010 (permalink)

  Hi Maks,
  
  You need to set UpdateValueEvent="PropertyChanged" as the Value is updated only on losing focus by default. Setting this property will update the Value on each digit you enter.
  

  Don't hesitate to contact us if you have other questions.

  Regards,
  Boyan
  the Telerik team

  Browse the videos here>> to help you get started with RadControls for WPF

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