更新

ShrlAlgoToolkit.Mvvm/Converters/MarkupConverters.cs

@@ -0,0 +1,82 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Markup;
+
+namespace ShrlAlgo.Toolkit.Wpf.Converters
+{
+    [ValueConversion(typeof(bool), typeof(Visibility))]
+    public class BoolVisibilityConverter : MarkupExtension, IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return (value is bool b && b) ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value is Visibility v && v == Visibility.Visible;
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+
+    [ValueConversion(typeof(bool), typeof(Visibility))]
+    public class InverseBoolVisibilityConverter : MarkupExtension, IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return (bool)value! == false ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return (Visibility)value! != Visibility.Visible;
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+    [ValueConversion(typeof(bool), typeof(bool))]
+    public class BooleanConverter : MarkupExtension, IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return (bool)value!;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return (bool)value!;
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+    [ValueConversion(typeof(bool), typeof(bool))]
+    public class InverseBooleanConverter : MarkupExtension, IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return !(bool)value!;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return !(bool)value!;
+        }
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+}