How to make conditional DataTrigger in WPF

Question

I wanna make coloring DataGridRow in my datagrid using style in WPF. I wanna make percentage of coloring based on value. If I have value binding Error between 0 and 50 it will be red. And if vice versa it will be colored as Green

But How I can do with style?

 <Style TargetType="DataGridRow">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding Error}" Value="Error>50"> //maybe something like this
                        <Setter Property="Foreground" Value="#FFE08F8F" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding Error}" Value="2">
                        <Setter Property="Foreground" Value="#FF6DBB6D" />
                    </DataTrigger>
                </Style.Triggers>
            </Style>

Answer 1

IMO the most flexible solution will be to add some kind of ErrorToColor converter. Then use this XAML:

<Setter Property="Foreground" >
    <Setter.Value>
        <SolidColorBrush Color="{Binding Error, Converter={StaticResource errorToColorConverter}}" />
    </Setter.Value>
</Setter>

Such converter could look like this:

public class IntToColorConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {            
        return value is int && ((int)value) > 50 ? Colors.Green : Colors.Red;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

This way you can easily manage colors for different error values.