Programmatically change individual ListViewItem layout

Question

I have a ListView with a GridView in it:

<ListView x:Name="listViewPersons" ItemsSource="{Binding Path=Persons, Mode=OneWay}" IsSynchronizedWithCurrentItem="True" 
         Height="Auto" HorizontalAlignment="Stretch" Margin="4,4,4,4" Grid.Row="4" VerticalAlignment="Stretch" Width="Auto">
      <ListView.View>
       <GridView x:Name="gridViewPersons">
        <GridViewColumn Header="Enabled">
         <GridViewColumn.CellTemplate>
          <DataTemplate>
           <StackPanel>
            <CheckBox HorizontalAlignment="Center" IsChecked="true" />
           </StackPanel>
          </DataTemplate>
         </GridViewColumn.CellTemplate>
        </GridViewColumn>
        <GridViewColumn Header="Name"  DisplayMemberBinding="{Binding Path=Name}" Width="142" />
        <GridViewColumn Header="Age"  DisplayMemberBinding="{Binding Path=Age}" Width="142" />
        <GridViewColumn Header="Gender"  DisplayMemberBinding="{Binding Path=Gender}" Width="142" />
       </GridView>
      </ListView.View>
     </ListView>

I want to be able to programmatically change each of the ListViewItems (or the rows in the grid) backgrounds or foregrounds to any color I want, for instance

listViewPersons.Items[0].Background = Brush.Red;
listViewPersons.Items[1].Background = Brush.Blue;
listViewPersons.Items[2].Background = Brush.Green

I know the previous lines of code don't work, but it pretty much explains what I want to achieve. Any help?

Thanks!

Answer 1

How about this approach:

1. Bind ForegroundColor and Background color to a property in Persons. Let's call this property PersonStatus, and set its type to a status enum, just for this example.

2. Ensure that this Persons implements INotifyPropertyChanged, and the setter for this property raises a ProperyChanged event. The property will look like this:

   public Status PersonStatus
   {
       get
       {
           return status;
       }
       set
       {
           if (value != status)
           {
               status= value;
               if (PropertyChanged != null)
                   PropertyChanged(this, new PropertyChangedEventArgs("PersonStatus"));
           }
       }
   }
   

3. Create an IValueConverter that takes the type of Status and returns a Brushes.Black, Brushes.Red, etc. Something like this:

   public class StatusToColorConverter : IValueConverter 
   {
       public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
       {
           if (targetType != typeof(Status))
               throw new InvalidOperationException("targetType must be Status");
   
   
       Status status = (Status)value;
   
   
       switch (status)
       {
           case Status.New:
               return Brushes.Black;
           case Status.Professional:
               return Brushes.Blue;
           case Status.Delete:
               return Brushes.Red;
           default:
               return Brushes.Black;
       }
   }
   
   
   public object ConvertBack(object value, Type targetType, object parameter,  System.Globalization.CultureInfo culture)
   {
       throw new NotImplementedException();
   }
   
   
   }