using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Windows.Data;

namespace Tree
{
	[ValueConversion(typeof(List<string>), typeof(string))]
	public class ListToStringConverter : IValueConverter
	{
		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (value == null)
			{
				return "";
			}
			var list = (List<string>) value;
			return String.Join(",", list);
		}

		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (value == null)
			{
				return new List<string>();
			}
			var s = (string) value;
			string[] ss = s.Split(',');
			return ss.ToList();
		}
	}
}