TimeToString.cs

using System.Globalization;
 
namespace NeuroAccessMaui.UI.Converters
{
    public class TimeToString : IValueConverter, IMarkupExtension
    {
        public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value is DateTime TP)
            {
                if (TP == DateTime.MinValue || TP == DateTime.MaxValue)
                    return string.Empty;
                else
                    return TP.ToLongTimeString();
            }
            else if (value is TimeSpan TS)
                return TS.ToString();
            else
                return string.Empty;
        }
 
        public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value is string s && TimeSpan.TryParse(s, out TimeSpan TS))
                return TS;
            else
                return TimeSpan.Zero;
        }
 
        public object? ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }
    }
}