Update IOrmLiteConverter.GetValue() to handle retrieving value from object[] values

Author: mythz

src/ServiceStack.OrmLite.Sqlite/Converters/SqliteDateTimeConverter.cs

@@ -59,16 +59,19 @@ public override object FromDbValue(Type fieldType, object value)
             return base.FromDbValue(dateTime);
         }
 
-        public override object GetValue(IDataReader reader, int columnIndex)
+        public override object GetValue(IDataReader reader, int columnIndex, object[] values)
         {
             try
             {
+                if (values != null && values[columnIndex] == DBNull.Value)
+                    return null;
+
                 return reader.GetDateTime(columnIndex);
             }
             catch (Exception ex)
             {
-                var value = reader.GetValue(columnIndex);
-                if (value == DBNull.Value)
+                var value = base.GetValue(reader, columnIndex, values);
+                if (value == null)
                     return null;
 
                 var dateStr = value as string;

src/ServiceStack.OrmLite.Sqlite/Converters/SqliteGuidConverter.cs

@@ -20,8 +20,19 @@ public override string ToQuotedString(Type fieldType, object value)
             return fmt;
         }
 
-        public override object GetValue(IDataReader reader, int columnIndex)
+        public override object GetValue(IDataReader reader, int columnIndex, object[] values)
         {
+            if (values != null)
+            {
+                if (values[columnIndex] == DBNull.Value)
+                    return null;
+            }
+            else
+            {
+                if (reader.IsDBNull(columnIndex))
+                    return null;
+            }
+
             return reader.GetGuid(columnIndex);
         }
     }

src/ServiceStack.OrmLite/IOrmLiteConverter.cs

@@ -19,7 +19,7 @@ public interface IOrmLiteConverter
 
         object FromDbValue(Type fieldType, object value);
 
-        object GetValue(IDataReader reader, int columnIndex);
+        object GetValue(IDataReader reader, int columnIndex, object[] values);
     }
 
     public interface IHasColumnDefinitionLength
@@ -87,9 +87,13 @@ public virtual object FromDbValue(Type fieldType, object value)
         /// <summary>
         /// Retrieve Value from ADO.NET IDataReader. Defaults to reader.GetValue()
         /// </summary>
-        public virtual object GetValue(IDataReader reader, int columnIndex)
+        public virtual object GetValue(IDataReader reader, int columnIndex, object[] values)
         {
-            return reader.GetValue(columnIndex);
+            var value = values != null 
+                ? values[columnIndex]
+                : reader.GetValue(columnIndex);
+
+            return value == DBNull.Value ? null : value;
         }
     }