Added HasExtraPropertiesObjectExtendingExtensions

framework/src/Volo.Abp.AutoMapper/AutoMapper/AbpAutoMapperExtensibleDtoExtensions.cs

@@ -24,7 +24,10 @@ namespace AutoMapper
 
                             foreach (var property in properties)
                             {
-                                result[property.Name] = source.ExtraProperties[property.Name];
+                                if (source.ExtraProperties.ContainsKey(property.Name))
+                                {
+                                    result[property.Name] = source.ExtraProperties[property.Name];
+                                }
                             }
 
                             return result;

framework/src/Volo.Abp.ObjectExtending/Volo/Abp/ObjectExtending/HasExtraPropertiesObjectExtendingExtensions.cs

@@ -0,0 +1,22 @@
+using Volo.Abp.Data;
+
+namespace Volo.Abp.ObjectExtending
+{
+    public static class HasExtraPropertiesObjectExtendingExtensions
+    {
+        public static void MapExtraPropertiesTo<TSource, TDestination>(this TSource source, TDestination destination)
+            where TSource : IHasExtraProperties
+            where TDestination : IHasExtraProperties
+        {
+            var extensionPropertyInfos = ObjectExtensionManager.Instance.GetProperties<TSource>();
+
+            foreach (var extensionPropertyInfo in extensionPropertyInfos)
+            {
+                if (source.ExtraProperties.ContainsKey(extensionPropertyInfo.Name))
+                {
+                    destination.ExtraProperties[extensionPropertyInfo.Name] = source.ExtraProperties[extensionPropertyInfo.Name];
+                }
+            }
+        }
+    }
+}