Custom calculated field in ListBox with databinding

Question

I'm making my first Windows Phone 7 App and it's almost done, except for a calculated field in my listbox.

I have a single database with an id, a name, and an integer. I'm using the MVVM pattern. Depending on a function with some calculations, I want yo show YES or NOT as the value of the first field of my ListBox, and the second column is simple the name. How can I show the first field?

This is my code at this moment (for the listbox):

    <ListBox x:Name="lstPills" Grid.Row="1" ItemsSource="{Binding AllItems}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <Grid HorizontalAlignment="Stretch" Width="440">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="90" />
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>
                    <Border Height="36" Width="60" CornerRadius="5" Background="Grey">
                        <TextBlock Text="HERE GOES YES or NOT" Foreground="White" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="28"/>
                    </Border>
                    <TextBlock
                        Text="{Binding Name}"
                        FontSize="{StaticResource PhoneFontSizeLarge}"
                        Grid.Column="1"
                        VerticalAlignment="Center"/>
                </Grid>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

And I have a class with the function that makes the calculation (just a example):

    public static bool isRight(int value)
    {
        return (Math.Abs(value) % 2 == 0 ? true : false);
    }

Is there some way to call this function with the bound parameter in the XAML so it reflects the result? Something like:

<TextBlock Text="isRight(Binding myvalue)"/>

I have also my Model and my ViewModel.

Answer 1

try binding this isRight Property

private int _lookupValue;
public bool isRight
    {
      get {
        return (Math.Abs(_lookupValue) % 2 == 0 ? true : false);
      }
    }

if you think this is still not appliable then you can go with Converters.