Setting ListView Background - wpf

Question

I hope to set the background with different brush, however, it doesn't work. No error, No warnings.
In my code, I hope make rows in ListView have different backgrounds, So, I define a Style for ListViewItem, but it can't know now. While I debug the code, I could step into local:NumberConverter:Convert(object value, Type targetType, object parameter, CultureInfo culture), however, the backgrounds of rows keep its original colors.
<UserControl x:Class="demo05_wpf02_binding.TabControl2"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:demo05_wpf02_binding"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
<Style x:Key="BookListStyle" TargetType="{x:Type ListViewItem}">
<Style.Resources>
<LinearGradientBrush x:Key="ProfitBrush" StartPoint="0.2,0" EndPoint="0.8,1">
<GradientStop Offset="0.3" Color="LavenderBlush" />
<GradientStop Offset="0.7" Color="CornflowerBlue" />
</LinearGradientBrush>
<LinearGradientBrush x:Key="LossBrush" StartPoint="0.2,0" EndPoint="0.8,1">
<GradientStop Offset="0.3" Color="LightYellow" />
<GradientStop Offset="0.7" Color="LightGoldenrodYellow" />
</LinearGradientBrush>
<local:NumberConverter x:Key="numConverter" />
</Style.Resources>
<Style.Triggers>
<DataTrigger Binding="{Binding Title, Converter={StaticResource numConverter}}" Value="0" >
<Setter Property="Background" Value="{StaticResource ProfitBrush}" />
</DataTrigger>
<DataTrigger Binding="{Binding Title, Converter={StaticResource numConverter}}" Value="1" >
<Setter Property="Background" Value="{StaticResource LossBrush}" />
</DataTrigger>
</Style.Triggers>
</Style>
</UserControl.Resources>
<DockPanel>
<ListView Name="ListView01" ItemContainerStyle="{StaticResource BookListStyle}" ItemsSource="{Binding}" Margin="5">
<ListView.View>
<GridView>
<GridViewColumn Header="Title" DisplayMemberBinding="{Binding Title}" Width="80" />
<GridViewColumn Header="Publisher" DisplayMemberBinding="{Binding Publisher}" Width="100" />
<GridViewColumn Header="ISBN" DisplayMemberBinding="{Binding ISBN}" Width="100" />
</GridView>
</ListView.View>
</ListView>
</DockPanel>
</UserControl>

Answer 1

Your problem must lie in your Converter. If you removed the Converter, then your XAML would work just fine as it is if your data items had Title values of 1 and 0.
<Style x:Key="BookListStyle" TargetType="{x:Type ListViewItem}">
<Style.Resources>
<LinearGradientBrush x:Key="ProfitBrush" StartPoint="0.2,0" EndPoint="0.8,1">
<GradientStop Offset="0.3" Color="LavenderBlush" />
<GradientStop Offset="0.7" Color="CornflowerBlue" />
</LinearGradientBrush>
<LinearGradientBrush x:Key="LossBrush" StartPoint="0.2,0" EndPoint="0.8,1">
<GradientStop Offset="0.3" Color="LightYellow" />
<GradientStop Offset="0.7" Color="LightGoldenrodYellow" />
</LinearGradientBrush>
</Style.Resources>
<Style.Triggers>
<DataTrigger Binding="{Binding Title}" Value="0" >
<Setter Property="Background" Value="{StaticResource ProfitBrush}" />
</DataTrigger>
<DataTrigger Binding="{Binding Title}" Value="1" >
<Setter Property="Background" Value="{StaticResource LossBrush}" />
</DataTrigger>
</Style.Triggers>
</Style>
So look closely at the code in your Converter... put a breakpoint there and step through the code until you find your problem. One other thing to note is that your LossBrush is very hard to see... maybe a stronger colour would help, even if only used when testing.