Add an option to enable reading the display name of a published node.

Default is disabled.

src/OpcSession.cs

@@ -322,16 +322,24 @@ namespace OpcPublisher
                                 currentNodeId = new NodeId((NodeId)item.StartNodeId);
                             }
 
-                            // get the DisplayName for the node, otherwise use the nodeId
-                            Node node = Session.ReadNode(currentNodeId);
-                            item.DisplayName = node.DisplayName.Text ?? currentNodeId.ToString();
+                            // if configured, get the DisplayName for the node, otherwise use the nodeId
+                            Node node;
+                            if (FetchOpcNodeDisplayName == true)
+                            {
+                                node = Session.ReadNode(currentNodeId);
+                                item.DisplayName = node.DisplayName.Text ?? currentNodeId.ToString();
+                            }
+                            else
+                            {
+                                item.DisplayName = currentNodeId.ToString();
+                            }
 
                             // add the new monitored item.
                             MonitoredItem monitoredItem = new MonitoredItem()
                             {
                                 StartNodeId = currentNodeId,
                                 AttributeId = item.AttributeId,
-                                DisplayName = node.DisplayName.Text,
+                                DisplayName = item.DisplayName,
                                 MonitoringMode = item.MonitoringMode,
                                 SamplingInterval = item.RequestedSamplingInterval,
                                 QueueSize = item.QueueSize,

src/Program.cs

@@ -72,6 +72,7 @@ namespace OpcPublisher
         public static int OpcKeepAliveIntervalInSec = 2;
         public static int OpcSamplingInterval = 1000;
         public static int OpcPublishingInterval = 0;
+        public static bool FetchOpcNodeDisplayName = false;
 
         public static string PublisherServerSecurityPolicy = SecurityPolicies.Basic128Rsa15;
 
@@ -294,6 +295,9 @@ namespace OpcPublisher
                     // trust own public cert option
                     { "tm|trustmyself=", $"the publisher certificate is put into the trusted certificate store automatically.\nDefault: {TrustMyself}", (bool b) => TrustMyself = b },
 
+                    // read the display name of the nodes to publish from the server and publish them instead of the node id
+                    { "fd|fetchdisplayname=", $"enable to read the display name of a published node from the server. this will increase the runtime.\nDefault: {FetchOpcNodeDisplayName}", (bool b) => FetchOpcNodeDisplayName = b },
+
                     // own cert store options
                     { "at|appcertstoretype=", $"the own application cert store type. \n(allowed values: Directory, X509Store)\nDefault: '{OpcOwnCertStoreType}'", (string s) => {
                             if (s.Equals(X509Store, StringComparison.OrdinalIgnoreCase) || s.Equals(Directory, StringComparison.OrdinalIgnoreCase))