AutoIfNonEmpty.cs

using System.Globalization;
 
namespace NeuroAccessMaui.UI.Converters
{
    [AcceptEmptyServiceProvider]
    public class AutoIfNonEmpty : IValueConverter, IMarkupExtension
    {
        private static readonly GridLength zeroLength = new(0, GridUnitType.Absolute);
 
        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value is string s)
                return !string.IsNullOrEmpty(s) ? GridLength.Auto : zeroLength;
            else if (value is bool b)
                return b ? GridLength.Auto : zeroLength;
            else
                return value is not null ? GridLength.Auto : zeroLength;
        }
 
        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            return value?.ToString() ?? string.Empty;
        }
 
        public object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }
    }
}