EntityChanged EventArgs

Source/Tests/TrackableEntities.Client.Tests/ChangeTrackingCollectionTests.cs

@@ -752,6 +752,22 @@ public void EntityChanged_Event_Should_Fire_When_Graph_Items_Added_Modified_Dele
             Assert.Equal(7, changesCount);
         }
 
+        [Fact]
+        public void EntityChanged_Event_Should_Provide_Better_EventArgs()
+        {
+            var database = new MockNorthwind();
+            var order = database.Orders[0];
+            var changeTracker = new ChangeTrackingCollection<Order> { order };
+            changeTracker.EntityChanged += (s, e) =>
+            {
+              var ecea = (EntityChangedEventArgs)e;
+              Assert.Same(order, ecea.Entity);
+              Assert.Equal(nameof(Order.OrderId), ecea.PropertyName);
+            };
+
+            order.OrderId++;
+        }
+
         #endregion
     }
 }

Source/TrackableEntities.Client.Net4/TrackableEntities.Client.Net4.csproj

@@ -73,6 +73,9 @@
     <Compile Include="..\TrackableEntities.Client\EntityBasePortable.cs">
       <Link>EntityBasePortable.cs</Link>
     </Compile>
+    <Compile Include="..\TrackableEntities.Client\EntityChangedEventArgs.cs">
+      <Link>EntityChangedEventArgs.cs</Link>
+    </Compile>
     <Compile Include="..\TrackableEntities.Client\IIdentifiable.cs">
       <Link>IIdentifiable.cs</Link>
     </Compile>

Source/TrackableEntities.Client.Net45/TrackableEntities.Client.Net45.csproj

@@ -71,6 +71,9 @@
     <Compile Include="..\TrackableEntities.Client\EntityBase.cs">
       <Link>EntityBase.cs</Link>
     </Compile>
+    <Compile Include="..\TrackableEntities.Client\EntityChangedEventArgs.cs">
+      <Link>EntityChangedEventArgs.cs</Link>
+    </Compile>
     <Compile Include="..\TrackableEntities.Client\IIdentifiable.cs">
       <Link>IIdentifiable.cs</Link>
     </Compile>

Source/TrackableEntities.Client/ChangeTrackingCollection.cs

@@ -157,7 +157,7 @@ private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
                     if (entity.TrackingState == TrackingState.Unchanged)
                     {
                         entity.TrackingState = TrackingState.Modified;
-                        if (EntityChanged != null) EntityChanged(this, EventArgs.Empty);
+                        if (EntityChanged != null) EntityChanged(this, new EntityChangedEventArgs(entity, null, e.PropertyName));
                     }
 
                     // Add prop to modified props, and fire EntityChanged event
@@ -171,7 +171,7 @@ private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
                     }
                 }
             }
-        }
+        }        
 
         /// <summary>
         /// Insert item at specified index.
@@ -201,7 +201,7 @@ protected override void InsertItem(int index, TEntity item)
                 item.SetState(TrackingState.Added, visitationHelper.Clone());
 
                 // Fire EntityChanged event
-                if (EntityChanged != null) EntityChanged(this, EventArgs.Empty);
+                if (EntityChanged != null) EntityChanged(this, new EntityChangedEventArgs(item, Parent, null));
             }
             base.InsertItem(index, item);
         }
@@ -239,7 +239,7 @@ protected override void RemoveItem(int index)
                 item.SetState(TrackingState.Deleted, visitationHelper.Clone());
 
                 // Fire EntityChanged event
-                if (EntityChanged != null) EntityChanged(this, EventArgs.Empty);
+                if (EntityChanged != null) EntityChanged(this, new EntityChangedEventArgs(item, Parent, null));
 
                 // Cache deleted item if not added or already cached
                 if (item.TrackingState != TrackingState.Added

Source/TrackableEntities.Client/EntityChangedEventArgs.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TrackableEntities.Client
+{
+    /// <summary>
+    /// Supplies data about the object that raised the event.
+    /// </summary>
+    public class EntityChangedEventArgs : EventArgs
+    {
+        /// <summary>
+        /// Initializes a new instance of <see cref="EntityChangedEventArgs"/>.    /// </summary>
+        /// <param name="entity"></param>
+        /// <param name="parent"></param>
+        /// <param name="propertyName"></param>
+        public EntityChangedEventArgs(ITrackable entity, ITrackable parent, string propertyName)
+        {
+            Entity = entity;
+            Parent = parent;
+            PropertyName = propertyName;
+        }
+
+        /// <summary>
+        /// To be added.
+        /// </summary>
+        public ITrackable Entity { get;  }
+        /// <summary>
+        /// To be added.
+        /// </summary>
+        public ITrackable Parent { get; }
+        /// <summary>
+        /// To be added.
+        /// </summary>
+        public string PropertyName { get; }
+    }
+}

Source/TrackableEntities.Client/TrackableEntities.Client.csproj

@@ -70,6 +70,7 @@
     <Compile Include="Constants.cs" />
     <Compile Include="EntityBase.cs" />
     <Compile Include="EntityBasePortable.cs" />
+    <Compile Include="EntityChangedEventArgs.cs" />
     <Compile Include="IIdentifiable.cs" />
     <Compile Include="IRefPropertyChangeTrackerResolver.cs" />
     <Compile Include="ITrackingCollection.cs" />