Question

I have following rangeobservablecollection:

private readonly RangeObservableCollection<coll> _coll;

where coll is bunch of checkboxes that i am adding to this collection. I want to change the foreground color of the checkbox on particular add like this:

_coll.Add( info );

Is there a way to change the color of this?

XAML code:

<StackPanel Orientation="Horizontal">
                <CheckBox Margin="0,0,3,0" Foreground="{Binding Foreground"}">
                    <CheckBox.IsChecked>
                        <Binding Path="IsSelected"
                                 Mode="TwoWay">
                            <Binding.RelativeSource>
                                <RelativeSource Mode="Parent" />
                            </Binding.RelativeSource>
                        </Binding>
                    </CheckBox.IsChecked>
                </CheckBox>
                <ContentPresenter />
            </StackPanel>

Answer 1

You can use a template on your ui object that binds the foreground color to a SolidColorBrush property on coll class.

<ListBox ItemsSource="{Binding items}">
    <ListBox.ItemTemplate>
      <DataTemplate>
        <StackPanel Orientation="Horizontal">
          <CheckBox IsChecked="{Binding IsChecked, Mode=TwoWay}" />
          <TextBlock Foreground="{Binding Foreground}" Content="{Binding Description}" />
        </StackPanel>
      </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

your class definition will look something like this:

public class coll
{
    public IsChecked { get; set; }
    public string Description { get; set; }
    public SolidColorBrush Foreground { get; set; }
}

then you can change the foreground:

info.Foreground = new SolidColorBrush(Colors.Red);
_coll.Add( info );

There’s a lot of variations you can use here to achieve the same effect: converters, INPC…