In Smart Office 10.2.1.0.367 HF 38 there is a new value converter that converts a number to a string label focusing on zero; equals, above or below.

The default behavior for the value converter is:

value < 0 returns NA
value = 0 returns No
value > 0 returns Yes
otherwise for non numeric input it returns an empty string

 Text="{Binding ElementName=InputValue, Path=Text, Converter={utils:AboveBelowZeroConverter}}"

The return labels for negative, zero and positive values can be customized by adding the ConverterParameter in the data binding containing three strings separated by _ or – characters. If the parameter is incorrect formatted the converter falls back to the default values and logs the issue if the log is in DEBUG mode.

Setting the following ConverterParameter will change the return labels to become Negative, Zero, Positive.

 Text="{Binding ElementName=InputValue, Path=Text, Converter={utils:AboveBelowZeroConverter}, ConverterParameter=Negative_Zero-Positive}"

Here is a the full code for you to try the converter out.

<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ui="clr-namespace:Mango.UI.Controls;assembly=Mango.UI" xmlns:mashup="clr-namespace:Mango.UI.Services.Mashup;assembly=Mango.UI" xmlns:utils="clr-namespace:Mango.UI.Services.Mashup;assembly=Mango.UI">
   <Grid.ColumnDefinitions>
      <ColumnDefinition Width="*" />
   </Grid.ColumnDefinitions>
   <Grid.RowDefinitions>
      <RowDefinition Height="Auto" />
      <RowDefinition Height="10" />
      <RowDefinition Height="Auto" />
      <RowDefinition Height="Auto" />
      <RowDefinition Height="*" />
   </Grid.RowDefinitions>
   <TextBlock Grid.Row="0" Text="Test of AboveBelowZeroConverter. Default: Return NA for negative values, No for zero and Yes for positive values, otherwise empty string" Margin="10" />
   <DockPanel Grid.Row="2" Margin="10" LastChildFill="False">
      <TextBlock DockPanel.Dock="Left" Text="Enter a value:" Margin="5" />
      <TextBox DockPanel.Dock="Left" Name="InputValue" Height="24" Width="60" VerticalAlignment="Top" HorizontalAlignment="Stretch" />
      <TextBlock DockPanel.Dock="Left" FontSize="16" Foreground="Green" Text="{Binding ElementName=InputValue, Path=Text, Converter={utils:AboveBelowZeroConverter}}" Margin="5" />
   </DockPanel>
   <DockPanel Grid.Row="3" Margin="10" LastChildFill="False">
      <TextBlock DockPanel.Dock="Top" Text="Custom return value. Set binding 'ConverterParameter=negative zero-positive' (Three strings separated by _ or - character, if invalid converter falls back to default)" Margin="5" />
      <TextBlock DockPanel.Dock="Top" FontSize="16" Foreground="Green" Text="{Binding ElementName=InputValue, Path=Text, Converter={utils:AboveBelowZeroConverter}, ConverterParameter=Negative_Zero-Positive}" Margin="150,5,5,5" />
   </DockPanel>
</Grid>