public static void Overload2()
{
// Instantiate the client object
var easyUAClient = new EasyUAClient();
// Obtain objects under "Server" node
UANodeElementCollection nodeElementCollection = easyUAClient.BrowseObjects(
"http://opcua.demo-this.com:51211/UA/SampleServer", // or "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer"
UAObjectIds.Server);
// Display results
foreach (UANodeElement nodeElement in nodeElementCollection)
{
Console.WriteLine();
Console.WriteLine("nodeElement.NodeId: {0}", nodeElement.NodeId);
Console.WriteLine("nodeElement.DisplayName: {0}", nodeElement.DisplayName);
}
// Example output:
//
//nodeElement.NodeId: nsu=http://opcfoundation.org/UA/;i=2268
//nodeElement.DisplayName: ServerCapabilities
//
//nodeElement.NodeId: nsu=http://opcfoundation.org/UA/;i=2274
//nodeElement.DisplayName: ServerDiagnostics
//
//nodeElement.NodeId: nsu=http://opcfoundation.org/UA/;i=2295
//nodeElement.DisplayName: VendorServerInfo
//
//nodeElement.NodeId: nsu=http://opcfoundation.org/UA/;i=2296
//nodeElement.DisplayName: ServerRedundancy
}
static IEnumerable <UANodeElement> GetNode(string server, EasyUAClient client, IEnumerable <string> path, IEnumerable <UANodeElement> currentNodes)
{
var _currentNodes = currentNodes ?? new List <UANodeElement>();
if (!path.Any())
{
return(currentNodes);
}
UANodeElementCollection nodes = new UANodeElementCollection();
if (!_currentNodes.Any())
{
nodes = client.BrowseObjects(server);
}
else
{
nodes = client.BrowseVariables(server, currentNodes.Last());
}
var node = nodes.SingleOrDefault(n => n.BrowseName.Name == path.First());
if (node != null)
{
return(GetNode(server, client, path.Skip(1), _currentNodes.Concat(new List <UANodeElement> {
node
})));
}
return(new List <UANodeElement>());
}
// GET api/<controller>
// GET api/<controller>/5
public object Get([FromUri] string[] path, string query = null)
{
var server = ConfigurationManager.AppSettings["opc-server"];
using (var client = new EasyUAClient())
{
UANodeElementCollection nodes = new UANodeElementCollection();
path = path.Where(p => p != null).ToArray(); //.FirstOrDefault()?.Split('/');
var nodePath = new List <UANodeElement>();
if (!path.Any())
{
nodes = client.BrowseObjects(server);
}
else
{
nodePath = GetNode(server, client, path, null).ToList();
if (!nodePath.Any())
{
return(null);
}
nodes = client.BrowseVariables(server, nodePath.Last());
}
return(new { path = path.Select((p, i) => new {
browseName = p,
node = NodeReturn(nodePath.ElementAtOrDefault(i))
}),
children = nodes.Select(NodeReturn) });
}
}
private static void BrowseFrom(UANodeDescriptor nodeDescriptor)
{
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Parent node: {0}", nodeDescriptor);
// Instantiate the client object
var easyUAClient = new EasyUAClient();
// Obtain notifiers
UANodeElementCollection notifierNodeElementCollection = easyUAClient.BrowseNotifiers(
"opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer",
nodeDescriptor);
// Display notifiers
Console.WriteLine();
Console.WriteLine("Notifiers:");
foreach (UANodeElement notifierNodeElement in notifierNodeElementCollection)
{
Console.WriteLine(notifierNodeElement);
}
// Obtain objects
UANodeElementCollection objectNodeElementCollection = easyUAClient.BrowseObjects(
"opc.tcp://opcua.demo-this.com:62544/Quickstarts/AlarmConditionServer",
nodeDescriptor);
// Recurse
foreach (UANodeElement objectNodeElement in objectNodeElementCollection)
{
BrowseFrom(objectNodeElement);
}
}
