Convert range filter dates to universaltime

All dates in the datetime filter were converted to UTC prior to selecting them from the database. Range filters were not considered however, leading to missing entries.

Author: curtisy1

Mvc.JQuery.DataTables.Common/Processing/TypeFilters.cs

@@ -111,12 +111,14 @@ public static string DateTimeOffsetFilter(string query, string columnname, DataT
                 DateTimeOffset start, end;
                 if (DateTimeOffset.TryParse(parts[0] ?? "", out start))
                 {
+                    start = start.ToUniversalTime();
                     filterString = columnname + " >= @" + parametersForLinqQuery.Count;
                     parametersForLinqQuery.Add(start);
                 }
 
                 if (DateTimeOffset.TryParse(parts[1] ?? "", out end))
                 {
+                    end = end.ToUniversalTime();
                     filterString = (filterString == null ? null : filterString + " and ") + columnname + " <= @" + parametersForLinqQuery.Count;
                     parametersForLinqQuery.Add(end);
                 }
@@ -161,12 +163,14 @@ public static string DateTimeFilter(string query, string columnname, DataTablesP
                 DateTime start, end;
                 if (DateTime.TryParse(parts[0] ?? "", out start))
                 {
+                    start = start.ToUniversalTime();
                     filterString = columnname + " >= @" + parametersForLinqQuery.Count;
                     parametersForLinqQuery.Add(start);
                 }
 
                 if (DateTime.TryParse(parts[1] ?? "", out end))
                 {
+                    end = end.ToUniversalTime();
                     filterString = (filterString == null ? null : filterString + " and ") + columnname + " <= @" + parametersForLinqQuery.Count;
                     parametersForLinqQuery.Add(end);
                 }
@@ -254,4 +258,4 @@ public static string EnumFilter(string q, string columnname, DataTablesPropertyI
             return columnname + " == @" + (parametersForLinqQuery.Count - 1);
         }
     }
-}
+}