using System; using Windows.UI.Xaml; #if WINDOWS_UWP namespace Xamarin.Forms.Platform.UWP #else namespace Xamarin.Forms.Platform.WinRT #endif { public class CollapseWhenEmptyConverter : Windows.UI.Xaml.Data.IValueConverter { public object Convert(object value, Type targetType, object parameter, string language) { 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, string language) { throw new NotSupportedException(); } } }