WPF_Practice/PacticeSolution/ListSample/Converter/AgeToRangeConverter.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;

namespace ListSample.Converter
{
    [ValueConversion(typeof(int), typeof(string))]
    internal class AgeToRangeConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null) 
                return null;

            return (int)value >= 40 ? "OB Group" : "YB Group";
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return null;
        }
    }
}