处理空节点的问题。 🔪

Author: PopeyeZhong

externals/opc/samples/client/BrowseCommand.cs

@@ -74,10 +74,11 @@ private static CommandOutletContent Dump(OpcNode node)
 		if(!string.IsNullOrEmpty(node.Label))
 			content.Last.Append(CommandOutletColor.DarkGray, $" {node.Label}");
 
-		content.Last
-			.Append(CommandOutletColor.DarkCyan, '(')
-			.Append(CommandOutletColor.DarkYellow, node.Type)
-			.Append(CommandOutletColor.DarkCyan, ')');
+		if(node.Type != null)
+			content.Last
+				.Append(CommandOutletColor.DarkCyan, '(')
+				.Append(CommandOutletColor.DarkYellow, node.Type)
+				.Append(CommandOutletColor.DarkCyan, ')');
 
 		if(!string.IsNullOrEmpty(node.Description) && !string.Equals(node.Label, node.Description))
 			content.Last.Append(CommandOutletColor.DarkGray, $" {node.Description}");

externals/opc/src/OpcNodeType.cs

@@ -102,6 +102,9 @@ partial class OpcNodeType
 	internal static OpcNodeType Get(ExpandedNodeId id) => Get((NodeId)id);
 	internal static OpcNodeType Get(NodeId id)
 	{
+		if(id == null || id.IsNullNodeId)
+			return null;
+
 		if(_types.TryGetValue(id, out var type))
 			return type;