30 lines
1.1 KiB
C#
30 lines
1.1 KiB
C#
using System.Globalization;
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using System.Windows.Data;
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namespace Melskin.Converters.Internal;
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/// <summary>
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/// 隔行交错背景颜色
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/// </summary>
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[ValueConversion(typeof(int), typeof(Visibility))]
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public class InterlacedBackgroundConverter : IValueConverter
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{
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/// <summary>
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/// InterlacedBackgroundConverter 的单例实例，用于提供隔行交错背景颜色的转换功能。
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/// 该实例可以直接在XAML中通过静态资源引用，以便为列表项等控件设置交替背景颜色。
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/// </summary>
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public static readonly InterlacedBackgroundConverter Instance = new();
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/// <inheritdoc />
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public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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{
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var line = (int)(value ?? throw new ArgumentNullException(nameof(value)));
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return line % 2 == 0 ? Visibility.Collapsed : Visibility.Visible;
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}
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/// <inheritdoc />
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public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
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{
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return Binding.DoNothing;
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}
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} |