using System.Globalization; using System.Windows; using System.Windows.Data; namespace SHH.CameraDashboard; // 1. 对象为空时隐藏,不为空时显示 public class NullToVisibilityConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return value == null ? Visibility.Collapsed : Visibility.Visible; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } }