At model change, get the name of the affected node

[MartinO]

Hi,

When subscribing to model change events. How can I get the BrowseName or DisplayName of the affected node?

I can get the nodeId from the BrowseNames.Changes and the parent node name from BrowseNames.SourceName. But I can not figure out how to get the name of the affected node.

I have tried BrowseNames.Name and BrowseNames.EffectiveDisplayName but the all return null.

string parentName = changeEvent.MonitoredItem.Filter.GetValue<string>(changeEvent.Event, BrowseNames.SourceName, "null"); // Returns the name of the parent node

string name = changeEvent.MonitoredItem.Filter.GetValue<string>(changeEvent.Event, BrowseNames.Name, "null"); // Returns "null"
string ename = changeEvent.MonitoredItem.Filter.GetValue<string>(changeEvent.Event, BrowseNames.EffectiveDisplayName, "null"); // Returns "null"

BR,
-Martin

[Support Team]

Hello Martin,

you cannot get the BrowseName of the affected node directly. You need to add the EventField "Changes" to the SelectClauses. The Datatype of this event field is ModelChangeStructureDataType. The structure field Affected represents the NodeId of the affected node. You can use the Read service to get the BrowseName.