功能更新

Melskin/Converters/Internal/InterlacedBackgroundConverter.cs

@@ -0,0 +1,30 @@
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Melskin.Converters.Internal;
+
+/// <summary>
+/// 隔行交错背景颜色
+/// </summary>
+[ValueConversion(typeof(int), typeof(Visibility))]
+public class InterlacedBackgroundConverter : IValueConverter
+{
+    /// <summary>
+    /// InterlacedBackgroundConverter 的单例实例，用于提供隔行交错背景颜色的转换功能。
+    /// 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。
+    /// </summary>
+    public static readonly InterlacedBackgroundConverter Instance = new();
+
+    /// <inheritdoc />
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        var line = (int)(value ?? throw new ArgumentNullException(nameof(value)));
+        return line % 2 == 0 ? Visibility.Collapsed : Visibility.Visible;
+    }
+
+    /// <inheritdoc />
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return Binding.DoNothing;
+    }
+}