using System.Globalization; using System.Windows; using System.Windows.Data; namespace SHH.CameraDashboard; // 2. 对象为空时显示,不为空时隐藏 (用于显示提示文字) public class InverseNullToVisibilityConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return value == null ? Visibility.Visible : Visibility.Collapsed; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } }