41 lines
1.3 KiB
C#
41 lines
1.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Data;
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namespace UIShare.Converters
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{
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public class BooleanToVisibilityConverter : IValueConverter
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{
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// 同时接受 "invert" / "inverse" / "inverted" / "reverse"（大小写不敏感）作为反转参数，
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// 避免因 XAML 处用了 ConverterParameter=Inverse 而静默失效。
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private static bool IsInvert(object parameter)
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{
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var s = parameter?.ToString()?.ToLowerInvariant();
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return s == "invert" || s == "inverse" || s == "inverted" || s == "reverse";
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}
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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{
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bool input = value is bool b && b;
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if (IsInvert(parameter))
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input = !input;
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return input ? Visibility.Visible : Visibility.Collapsed;
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}
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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{
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bool output = value is Visibility v && v == Visibility.Visible;
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if (IsInvert(parameter))
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output = !output;
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return output;
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}
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}
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}
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