过滤器修复

Filters/GlobalActionMonitor.cs

@@ -133,8 +133,9 @@ namespace Middleware
                                                         }
                                                     }
                                                 }
-                                                if(value.ToString() == "-1") value = -1;
-                                                if(value.ToString() == "[]") value = "";
+                                                if(value == null) value = "";
+                                                else if(value.ToString() == "-1") value = -1;
+                                                else if(value.ToString() == "[]") value = "";
                                                 propertyInfos[i].SetValue(entry, value, null);
                                                 break;
                                             }