WPF DataValidation on a DataTemplate object in an ItemsControl
- by Matt H.
I have two datatemplates, both very similar... here is one of them:
<DataTemplate x:Key="HeadingTemplate">
<Grid x:Name="mainHeadingGrid" Margin="5,5,30,0" HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition />
…