How to make alternating background color for ItemsControl rows (Silverlight)?

Question

How to make alternating background color for ItemsControl rows?

Answer 1

This is not built in function of ItemsControl. what you can do is extend ItemsControl for the requirement.

Nice example can found from here

Answer 2

I took the code from Joe McBride and generalized it to let you specify what property to set (defaults to Background) and how many rows of each color before alternating (defaults to 1), and not require any external files.

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;

namespace Converters
{
    public class AlternatingRowConverter : IValueConverter
    {
        public Brush NormalBrush { get; set; }
        public Brush AlternateBrush { get; set; }
        public int AlternateEvery { get; set; }
        public string Property { get; set; }

        public AlternatingRowConverter()
        {
            AlternateEvery = 1;
            Property = "Background";
        }

        public object Convert(
            object value, Type targetType, object parameter, CultureInfo culture)
        {
            var element = (FrameworkElement)value;
            element.Loaded += Element_Loaded;

            return NormalBrush;
        }

        public object ConvertBack(
            object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        private void Element_Loaded(object sender, RoutedEventArgs e)
        {
            var element = (FrameworkElement)sender;

            DependencyObject obj = element;
            do
            {
                obj = VisualTreeHelper.GetParent(obj);
            } while (!(obj is ItemsControl) && obj != null);

            var parent = (ItemsControl)obj;
            if (parent != null)
            {
                DependencyObject container =
                    parent.ItemContainerGenerator.ContainerFromItem(
                    element.DataContext);

                if (container != null)
                {
                    int index = parent.ItemContainerGenerator.IndexFromContainer(
                        container);

                    if (index % (AlternateEvery * 2) >= AlternateEvery)
                        element.GetType().GetProperty(Property)
                            .SetValue(element, AlternateBrush, null);
                }
            }
        }
    }
}