SWRIS-HD/Converters/TrolleysToVisibilityConverter.cs

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

namespace SWRIS.Converters
{
    public class TrolleysToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            // 判断是否为 null
            if (value == null)
                return Visibility.Collapsed;

            // 判断是否为集合且为空
            if (value is ICollection collection)
            {
                return collection.Count == 0 ? Visibility.Collapsed : Visibility.Visible;
            }
            // 其他情况默认可见
            return Visibility.Visible;
        }
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}