添加项目文件。

Util.DiagramDesigner/Converters/BoolToVisibilityConverter.cs

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+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 Util.DiagramDesigner
+{
+    [ValueConversion(typeof(bool), typeof(Visibility))]
+    public class BoolToVisibilityConverter : IValueConverter
+    {
+        static BoolToVisibilityConverter()
+        {
+            Instance = new BoolToVisibilityConverter();
+        }
+
+        public static BoolToVisibilityConverter Instance
+        {
+            get;
+            private set;
+        }
+
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            return ((bool)value) ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+
+
+
+
+
+
+    }
+}