Thank you very much.

Hello Z,

I am currently working with a customer that is trying to update its local tag data structure whenever a value changes in the OPC UA Server. He used to do it with another toolkit by utilizing the handle return by the call as such:

mTags[handle].Value = e.Attribute.Value;

My question to you is, does the toolkit exposes the handles as System.Int32[]? The customer would like to use the integer for the indexing rather than using the NodeID.identifier String.

Could it be that we can use " e.Arguments.NodeDescriptor.NodeId.Identifier" as a way of identifying the tag that changed? Something like:

static void easyUAClient_DataChangeNotification(object sender, EasyUADataChangeNotificationEventArgs e)
{
mMyOPCTags[e.Arguments.NodeDescriptor.NodeId.Identifier].value = e.AttributeData.Value;
}

I just think that a string based index would not be as efficient though.


I tried to look in the documentation, but unfortunately, I failed to find any clues if this is possible with the toolkit so any guidance will be appreciated. Thank you.