线条控件

AIStudio.Wpf.DiagramDesigner/Converters/MathConverter.cs

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+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public enum MathOperation
+    {
+        Add,
+        Subtract,
+        Multiply,
+        Divide
+    }
+
+    public sealed class MathConverter : IValueConverter
+    {
+        public MathOperation Operation
+        {
+            get; set;
+        }
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            try
+            {
+                double value1 = System.Convert.ToDouble(value, CultureInfo.InvariantCulture);
+                double value2 = System.Convert.ToDouble(parameter, CultureInfo.InvariantCulture);
+                switch (Operation)
+                {
+                    case MathOperation.Add:
+                        return value1 + value2;
+                    case MathOperation.Divide:
+                        return value1 / value2;
+                    case MathOperation.Multiply:
+                        return value1 * value2;
+                    case MathOperation.Subtract:
+                        return value1 - value2;
+                    default:
+                        return Binding.DoNothing;
+                }
+            }
+            catch (FormatException)
+            {
+                return Binding.DoNothing;
+            }
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return Binding.DoNothing;
+        }
+    }
+}