WPF one trigger for multiple values - wpf

Question

I'm trying to create a single trigger will trigger on multiple possible options. I want to set the background to green when options are either "Reviewed" or "Completed". Then I want a second trigger to change the background to Yellow when "Pending" or "Yellow".
This answer pointed me towards it, but was incomplete and i couldn't make sense of it: https://stackoverflow.com/a/4660030/526704
Here's what I have now:
<Style x:Key="StatusCellTextBlock" TargetType="TextBlock">
<Style.Triggers>
<Trigger Property="Text" Value="Reviewed">
<Setter Property="Background" Value="Green"/>
</Trigger>
<Trigger Property="Text" Value="Completed">
<Setter Property="Background" Value="Green"/>
</Trigger>
<Trigger Property="Text" Value="Pending">
<Setter Property="Background" Value="Yellow"/>
</Trigger>
<Trigger Property="Text" Value="Pending Review">
<Setter Property="Background" Value="Yellow"/>
</Trigger>
</Style.Triggers>
</Style>
Here's the kind of thing i'm looking for: (some way to specify multiple values of the property that trigger the same setters. I have many more of these that I'd like to condense without repeating the same trigger many times)
<Style x:Key="StatusCellTextBlock" TargetType="TextBlock">
<Style.Triggers>
<Trigger Property="Text" Value="Reviewed" Value2="Completed">
<Setter Property="Background" Value="Green"/>
</Trigger>
<Trigger Property="Text" Value="Pending" Value2="Pending Review">
<Setter Property="Background" Value="Yellow"/>
</Trigger>
</Style.Triggers>
</Style>

Answer 1

You can create your custom IValueConverter that would convert string into SolidColorBrush
public class TextToBackgroundConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
switch ((string)value)
{
case "Reviewed":
case "Completed":
return new SolidColorBrush(Colors.Green);
case "Pending":
case "Pending Review":
return new SolidColorBrush(Colors.Yellow);
}
return DependencyProperty.UnsetValue;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
and then you don't even need Trigger. You can use Binding with Converter
<Style x:Key="StatusCellTextBlock" TargetType="TextBlock">
<Setter
Property="Background"
Value="{Binding RelativeSource={RelativeSource Self}, Path=Text, Converter={StaticResource TextToBackgroundConverter}}"/>
</Style>
where TextToBackgroundConverter is defined somewhere in resources as
<Window.Resources>
<local:TextToBackgroundConverter x:Key="TextToBackgroundConverter"/>
</Window.Resources>

Answer 2

I devised a solution. I'm now using a converter to determine whether or not the value is given among the provided parameters. I send the options "Reviewed,Completed" as a parameter to the converter, which returns true if the text from the TextBlock is found anywhere in the parameter.
XAML:
<Style TargetType="TextBlock" x:Key="StatusStyle">
<Style.Triggers>
<DataTrigger Value="True" Binding="{Binding Text, RelativeSource={RelativeSource Self}, Converter={StaticResource OrConverter}, ConverterParameter=Reviewed;Completed}">
<Setter Property="Foreground" Value="Green" />
</DataTrigger>
</Style.Triggers>
</Style>
Converter:
[ValueConversion(typeof(string), typeof(bool))]
public class MultiValueOrConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return ((string)parameter).Split(';').Contains((string)value);
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}
}