月更

AntDesignWPF/Converters/ArithmeticConverter.cs

@@ -0,0 +1,40 @@
+namespace AntDesign.WPF.Converters
+{
+    using System;
+    using System.Globalization;
+    using System.Windows;
+    using System.Windows.Data;
+    using System.Windows.Markup;
+
+    public abstract class ArithmeticConverter : MarkupExtension, IValueConverter
+    {
+        public abstract double Convert(double value, Type targetType, double parameter, CultureInfo culture);
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            try
+            {
+                var val = (double)value;
+
+                if (double.IsNaN(val))
+                {
+                    return value;
+                }
+
+                return Convert(val, targetType, double.Parse(parameter as string), culture);
+
+            } catch { }
+
+            return value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return DependencyProperty.UnsetValue;
+        }
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return this;
+        }
+    }
+}