结构调整，便于后续扩展

AIStudio.Wpf.BaseDiagram/Converters/StringPathConverter.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace AIStudio.Wpf.BaseDiagram.Converters
+{
+    public class StringPathConverter : IValueConverter
+    {
+
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            if (value is string)
+            {
+                Geometry geo = Geometry.Parse(value as string);
+                return geo;
+                //GeometryConverter gc = new GeometryConverter();
+                //return (Geometry)gc.ConvertFromString(value as string);
+            }
+            return null;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}