Changed LogDisplayTraceListener to use DiagnosticsFilter.

Author: Sergey-Vlasov

Source/ExcelDna.Integration/LogDisplayTraceListener.cs

@@ -13,16 +13,15 @@ namespace ExcelDna.Logging
     //           This might allow the source and EventType (and maybe a sequence) to be separate columns.
     public class LogDisplayTraceListener : TraceListener
     {
-        private TraceEventType? filterLevel;
-
         public LogDisplayTraceListener()
         {
         }
 
         public LogDisplayTraceListener(string name, TraceEventType? filterLevel)
             : base(name)
         {
-            this.filterLevel = filterLevel;
+            if (filterLevel.HasValue)
+                Filter = new DiagnosticsFilter(filterLevel.Value);
         }
 
         public override void TraceEvent(TraceEventCache eventCache, string source, TraceEventType eventType, int id, string message)
@@ -35,9 +34,6 @@ public override void TraceEvent(TraceEventCache eventCache, string source, Trace
             if (Filter != null && !Filter.ShouldTrace(eventCache, source, eventType, id, format, args, null, null))
                 return;
 
-            if (filterLevel.HasValue && eventType > filterLevel.Value)
-                return;
-
             string idDescription;
             if (source == "ExcelDna.Integration")
             {