We are using RadTreeView with checkboxes and I want to show user an Error message as Please select atleast one node. I m using following code however I m not able to get any error message. I have properly defined IDateError Info object.
<telerik:RadTreeView Grid.Row="1" Name="TreeView" IsVirtualizing="True" IsOptionElementsEnabled="True" ItemsOptionListType="CheckList" ItemsSource="{Binding Children, ValidatesOnDataErrors=True}" ItemTemplate="{StaticResource FamilyTemplate}" />
How should I set it?