using System; using System.Globalization; using System.Windows; namespace Xamarin.Forms.Platform.WinPhone { public class CollapseWhenEmptyConverter : System.Windows.Data.IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { var length = 0; var s = value as string; if (s != null) length = s.Length; if (value is int) length = (int)value; return length > 0 ? Visibility.Visible : Visibility.Collapsed; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotSupportedException(); } } }