23 lines
663 B
C#
23 lines
663 B
C#
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using System;
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using System.Globalization;
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using System.Windows;
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using System.Windows.Data;
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namespace PCL.Core.UI.Converters;
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/// <summary>
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/// 将可 null 的值转换为 WPF Visibility 状态：若为 null 则折叠，否则可见
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/// </summary>
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public sealed class NullToVisibilityConverter : IValueConverter
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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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return value is not null ? 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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throw new NotSupportedException();
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}
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}
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