- add methods to handle entries

- first implementation of OnGBaseEntryChanged

GBase/GBaseTable.cs

@@ -119,14 +119,46 @@ namespace GBase
             return Columns.Remove(column);
         }
 
+        private bool AddEntry(object entry) //TODO: Write to file
+        {
+            Entries.Add(entry);
+            return true;
+        }
+
+        private bool ModifyEntry(object entry, string propertyName, object value) //TODO: Write to file
+        {
+            PropertyInfo property = entry.GetType().GetProperty(propertyName);
+            if (property == null)
+                return false;
+
+            property.SetValue(entry, value);
+            return true;
+        }
+
+        private bool RemoveEntry(object entry) //TODO: remove from file
+        {
+            if (!Entries.Contains(entry))
+                return false;
+
+            return Entries.Remove(entry);
+        }
+
         /// <summary>
         /// A <see cref="IGBase"/> entry changed
         /// </summary>
-        /// <param name="sender">The sender</param>
+        /// <param name="entry">The entry (sender)</param>
         /// <param name="args">The <see cref="GBaseEntryChangedEventArgs"/></param>
-        private void OnGBaseEntryChanged(object sender, GBaseEntryChangedEventArgs args)
+        private void OnGBaseEntryChanged(object entry, GBaseEntryChangedEventArgs args)
         {
-            //TODO: Implement function, depending on #23
+            //TODO: Might change, depending on #23
+            bool success;
+            if (!Entries.Contains(entry))
+                success = AddEntry(entry);
+            else
+                success = ModifyEntry(entry, args.ColumnName, args.Value);
+
+            if (!success)
+                throw new Exception("Failed to handle EntryChanged"); //TODO: Decide what to do here
         }
 
         /// <summary>