Hi Boomessh,

Thank you for contacting Infragistics Developer Support!

Sure, what you are looking for can be achieved by creating styles targeting the TreeCellValuePresenter and CellValuePresenter elements and assigning the relevant properties. Since the values would be conditional, they can be assigned with the help of a custom ValueConverter.

The only special case would be the TextDecoration style, as it requires targeting the internal elements of the presenters. It can be handled through code, for example in the Loaded event handler, assigned through an EventSetter.

All this is demonstrated in the sample I am attaching to this message. Please, check it out and let me know if it helps. Below are the relevant code snippets:

 <igWPF:XamTreeGrid.Resources>
     <Style TargetType="{x:Type igWPF:CellValuePresenter}">
         <Setter Property="Foreground"
                 Value="{Binding DataItem.Name, Converter={StaticResource fontConverter}}" />
         <Setter Property="FontStyle"
                 Value="{Binding DataItem.Name, Converter={StaticResource fontConverter}}" />
         <Setter Property="FontWeight"
                 Value="{Binding DataItem.Name, Converter={StaticResource fontConverter}}" />
         <EventSetter Event="Loaded"
                      Handler="CellValuePresenter_Loaded"></EventSetter>
     </Style>
     <Style TargetType="{x:Type igWPF:TreeCellValuePresenter}">
         <Setter Property="Foreground"
                 Value="{Binding DataItem.Name, Converter={StaticResource fontConverter}}" />
         <Setter Property="FontStyle"
                 Value="{Binding DataItem.Name, Converter={StaticResource fontConverter}}" />
         <Setter Property="FontWeight"
                 Value="{Binding DataItem.Name, Converter={StaticResource fontConverter}}" />
         <EventSetter Event="Loaded"
                      Handler="CellValuePresenter_Loaded"></EventSetter>
     </Style>

 public class FontConverter : IValueConverter
 {
     public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
     {
         var text = value as string;
         if (text == null)
             return DependencyProperty.UnsetValue;

         var lower = text.ToLowerInvariant();

         if (targetType == typeof(FontWeight))
         {
             return lower.Contains("a") ? FontWeights.Bold : FontWeights.Normal;
         }
         if (targetType == typeof(FontStyle))
         {
             return lower.Contains("b") ? FontStyles.Italic : FontStyles.Normal;
         }
        
         if (typeof(Brush).IsAssignableFrom(targetType))
         {
             if (lower.Contains("a")) return Brushes.Red;
             if (lower.Contains("b")) return Brushes.Green;
             if (lower.Contains("c")) return Brushes.Blue;
             return SystemColors.ControlTextBrush;
         }

         return DependencyProperty.UnsetValue;
     }

     public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
     {
         return Binding.DoNothing;
     }
 }

        private void CellValuePresenter_Loaded(object sender, RoutedEventArgs e)
        {
            SimpleTextBlock underlinedText = Utilities.GetDescendantFromType((sender as DependencyObject), typeof(SimpleTextBlock), false) as SimpleTextBlock;
            if (underlinedText.Text.Contains("c"))
                underlinedText.Style = this.FindResource("textDecorSimpleTxb") as Style;
        }

Best regards,
Bozhidara Pachilova
Software Developer

8875.XTGConditionalStyles.zip