Edition of primitives is changed

Infrastructure/UI/Converters/Units/Length.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+
+namespace StructureHelper.Infrastructure.UI.Converters.Units
+{
+    internal class Length : UnitBase
+    {
+        public override string unitName { get => "Length"; }
+
+        public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            double val;
+            if (value != null) { val = (double)value; }
+            else { throw new Exception($"{unitName} value is null"); }
+            val *= UnitConstatnts.LengthConstant;
+            return val;
+        }
+
+        public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            double val;
+            if (value != null)
+            {
+                var strVal = value as string;
+                double.TryParse(strVal, out val);
+            }
+            else { throw new Exception($"{unitName} value is null"); }
+            val /= UnitConstatnts.LengthConstant;
+            return val;
+        }
+    }
+}