Add propertyvalueconverter

StringListPropertyValueConverter.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using Umbraco.Core.Models.PublishedContent;
+using Umbraco.Core.PropertyEditors;
+
+ public class StringListPropertyValueConverter : IPropertyValueConverter, IPropertyValueConverterMeta
+    {
+        public bool IsConverter(PublishedPropertyType propertyType)
+        {
+            return propertyType.PropertyEditorAlias.Equals("Epiphany.SortableStringList");
+        }
+
+        public object ConvertDataToSource(PublishedPropertyType propertyType, object source, bool preview)
+        {
+            if (source == null) { return null; }
+
+            return DeserializeFromJson(source.ToString());
+        }
+
+        public object ConvertSourceToObject(PublishedPropertyType propertyType, object source, bool preview)
+        {
+            return source;
+        }
+
+        public object ConvertSourceToXPath(PublishedPropertyType propertyType, object source, bool preview)
+        {
+            return source.ToString();
+        }
+
+        public Type GetPropertyValueType(PublishedPropertyType propertyType)
+        {
+            return typeof(IList<string>);
+        }
+
+        public PropertyCacheLevel GetPropertyCacheLevel(PublishedPropertyType propertyType, PropertyCacheValue cacheValue)
+        {
+            PropertyCacheLevel returnLevel;
+            switch (cacheValue)
+            {
+                case PropertyCacheValue.Object:
+                    returnLevel = PropertyCacheLevel.ContentCache;
+                    break;
+                case PropertyCacheValue.Source:
+                    returnLevel = PropertyCacheLevel.Content;
+                    break;
+                case PropertyCacheValue.XPath:
+                    returnLevel = PropertyCacheLevel.Content;
+                    break;
+                default:
+                    returnLevel = PropertyCacheLevel.None;
+                    break;
+            }
+            return returnLevel;
+        }
+
+        private static IList<string> DeserializeFromJson(string json)
+        {
+            var jsonObject = Newtonsoft.Json.JsonConvert.DeserializeObject<IList<string>>(json);
+            return jsonObject;
+        }
+    }