Trigger when condition is not equal to - wpf

Question

I need a Style under WPF that sets several properties when multiple conditions are fullfilled. However, one of my conditions is of type Not Equal To. How should I change the below Style so that the condition would become Not Equal To? Can it be even achieved without IValueConverter?
<Style>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<!--<Condition 1 here.../>-->
<!--<Condition 2 here.../>-->
<Condition Binding="{Binding Path=id}" Value="3"/>
</MultiDataTrigger.Conditions>
<Setter Property="Background" Value="Red"/>
<Setter Property="Foreground" Value="Black"/>
</MultiDataTrigger>
</Style.Triggers>
</Style>
I would need the below but this of course don't work since Triggers only support Equal operator.
<Style>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<!--<Condition 1 here.../>-->
<!--<Condition 2 here.../>-->
<Condition Binding="{Binding Path=id}" Value<>"3"/>
</MultiDataTrigger.Conditions>
<Setter Property="Background" Value="Red"/>
<Setter Property="Foreground" Value="Black"/>
</MultiDataTrigger>
</Style.Triggers>
</Style>

Answer 1

You need an IValueConverter and some extra markup for this:
<Style>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<!--<Condition 1 here.../>-->
<!--<Condition 2 here.../>-->
<Condition>
<Condition.Binding>
<Binding Path="id" Converter="{StaticResource ValueToEqualsParameterConverter}">
<Binding.ConverterParameter>
<System:Int32>3</System:Int32>
</Binding.ConverterParameter>
</Binding>
</Condition.Binding>
<Condition.Value>
<System:Boolean>False</System:Boolean>
</Condition.Value>
</Condition>
</MultiDataTrigger.Conditions>
<Setter Property="Background" Value="Red" />
<Setter Property="Foreground" Value="Black" />
</MultiDataTrigger>
</Style.Triggers>
</Style>
And the converter:
public class ValueToEqualsParameterConverter : IValueConverter {
public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
return value == parameter;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
return null;
}
}

Answer 2

Another option is to define default value as setter in style and then implement data trigger. In following code, the background value is always red except when value is 3
<Style>
<Setter Property="Background" Value="Red"/>
<Setter Property="Foreground" Value="Black"/>
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<!--<Condition 1 here.../>-->
<!--<Condition 2 here.../>-->
<Condition Binding="{Binding Path=id}" Value="3"/>
</MultiDataTrigger.Conditions>
<Setter Property="Background" Value="DefaultColor"/>
<Setter Property="Foreground" Value="DefaultColor2"/>
</MultiDataTrigger>
</Style.Triggers>
</Style>