public static async Task <IEnumerable <ReferenceDescription[]> > BrowseOpcServerAsync(UaTcpSessionChannel channel, NodeId BrowseRoot)
{
BrowseRequest browseRequest = new BrowseRequest()
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription()
{
NodeId = BrowseRoot, BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
var browseResponse = await channel.BrowseAsync(browseRequest);
var temp = browseResponse.Results.Select((a) => a.References ?? new ReferenceDescription[0]);
return(temp);
}
public async Task BrowseObjects()
{
var channel = new UaTcpSessionChannel(
localDescription,
certificateStore,
new AnonymousIdentity(),
EndpointUrl,
SecurityPolicyUris.None,
loggerFactory: loggerFactory);
await channel.OpenAsync();
var rds = new List <ReferenceDescription>();
var browseRequest = new BrowseRequest {
NodesToBrowse = new[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(ExpandedNodeId.Parse(ObjectIds.ObjectsFolder), channel.NamespaceUris), ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), ResultMask = (uint)BrowseResultMask.TargetInfo, NodeClassMask = (uint)NodeClass.Unspecified, BrowseDirection = BrowseDirection.Forward, IncludeSubtypes = true
} }, RequestedMaxReferencesPerNode = 1000
};
var browseResponse = await channel.BrowseAsync(browseRequest).ConfigureAwait(false);
rds.AddRange(browseResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
var continuationPoints = browseResponse.Results.Select(br => br.ContinuationPoint).Where(cp => cp != null).ToArray();
while (continuationPoints.Length > 0)
{
var browseNextRequest = new BrowseNextRequest {
ContinuationPoints = continuationPoints, ReleaseContinuationPoints = false
};
var browseNextResponse = await channel.BrowseNextAsync(browseNextRequest);
rds.AddRange(browseNextResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
continuationPoints = browseNextResponse.Results.Select(br => br.ContinuationPoint).Where(cp => cp != null).ToArray();
}
rds
.Should().NotBeEmpty();
logger.LogInformation("+ Objects, 0:Objects, Object");
foreach (var rd in rds)
{
logger.LogInformation(" + {0}, {1}, {2}", rd.DisplayName, rd.BrowseName, rd.NodeClass);
}
logger.LogInformation($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
public async Task BrowseRoot()
{
var channel = new UaTcpSessionChannel(
this.localDescription,
this.certificateStore,
new AnonymousIdentity(),
EndpointUrl,
SecurityPolicyUris.None,
loggerFactory: this.loggerFactory);
await channel.OpenAsync();
var rds = new List <ReferenceDescription>();
var browseRequest = new BrowseRequest {
NodesToBrowse = new[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(ExpandedNodeId.Parse(ObjectIds.RootFolder), channel.NamespaceUris), ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), ResultMask = (uint)BrowseResultMask.TargetInfo, NodeClassMask = (uint)NodeClass.Unspecified, BrowseDirection = BrowseDirection.Forward, IncludeSubtypes = true
} }, RequestedMaxReferencesPerNode = 1000
};
var browseResponse = await channel.BrowseAsync(browseRequest).ConfigureAwait(false);
rds.AddRange(browseResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
var continuationPoints = browseResponse.Results.Select(br => br.ContinuationPoint).Where(cp => cp != null).ToArray();
while (continuationPoints.Length > 0)
{
var browseNextRequest = new BrowseNextRequest {
ContinuationPoints = continuationPoints, ReleaseContinuationPoints = false
};
var browseNextResponse = await channel.BrowseNextAsync(browseNextRequest);
rds.AddRange(browseNextResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
continuationPoints = browseNextResponse.Results.Select(br => br.ContinuationPoint).Where(cp => cp != null).ToArray();
}
Assert.IsTrue(rds.Count == 3);
Console.WriteLine($"Closing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
private async Task <IList <ReferenceDescription> > BrowseTree(NodeId tree)
{
var browseRequest = new BrowseRequest {
NodesToBrowse = new[] {
new BrowseDescription {
NodeId = tree,
ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences),
ResultMask = (uint)BrowseResultMask.TargetInfo,
NodeClassMask = (uint)NodeClass.Object | (int)NodeClass.Variable,
BrowseDirection = BrowseDirection.Forward,
IncludeSubtypes = true
}
},
RequestedMaxReferencesPerNode = 1000
};
var rds = new List <ReferenceDescription>();
BrowseResponse browseResponse = await connection.BrowseAsync(browseRequest);
rds.AddRange(browseResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
var continuationPoints = browseResponse.Results.Select(br => br.ContinuationPoint).Where(cp => cp != null).ToArray();
while (continuationPoints.Length > 0 && connection != null)
{
var browseNextRequest = new BrowseNextRequest {
ContinuationPoints = continuationPoints, ReleaseContinuationPoints = false
};
var browseNextResponse = await connection.BrowseNextAsync(browseNextRequest);
rds.AddRange(browseNextResponse.Results.Where(result => result.References != null).SelectMany(result => result.References));
continuationPoints = browseNextResponse.Results.Select(br => br.ContinuationPoint).Where(cp => cp != null).ToArray();
}
return(rds);
}
private static async Task TestAsync()
{
var loggerFactory = new LoggerFactory();
loggerFactory.AddDebug(LogLevel.Trace);
var discoveryUrl = "opc.tcp://localhost:26543"; // Workstation.NodeServer
//var discoveryUrl = "opc.tcp://localhost:48010"; // UaCppServer - see http://www.unified-automation.com/
//var discoveryUrl = "opc.tcp://localhost:16664"; // open62541
Console.WriteLine("Step 1 - Describe this app.");
var appDescription = new ApplicationDescription()
{
ApplicationName = "MyHomework",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:MyHomework",
ApplicationType = ApplicationType.Client,
};
Console.WriteLine("Step 2 - Create a certificate store.");
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
Console.WriteLine("Step 3 - Create a session with your server.");
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
ShowSignInDialog,
discoveryUrl,
loggerFactory: loggerFactory);
try
{
await channel.OpenAsync();
Console.WriteLine($" Opened channel with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($" SecurityPolicyUri: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($" SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($" UserIdentity: '{channel.UserIdentity}'.");
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 4 - Browse the server namespace.");
Console.WriteLine("+ Root");
BrowseRequest browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd1.DisplayName, rd1.BrowseName, rd1.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd2.DisplayName, rd2.BrowseName, rd2.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd3.DisplayName, rd3.BrowseName, rd3.NodeClass);
}
}
}
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 5 - Create a subscription.");
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await channel.CreateSubscriptionAsync(subscriptionRequest);
var id = subscriptionResponse.SubscriptionId;
Console.WriteLine("Step 6 - Add items to the subscription.");
var itemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await channel.CreateMonitoredItemsAsync(itemsRequest);
Console.WriteLine("Step 7 - Subscribe to PublishResponse stream.");
var token = channel.Where(pr => pr.SubscriptionId == id).Subscribe(pr =>
{
// loop thru all the data change notifications
var dcns = pr.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"sub: {pr.SubscriptionId}; handle: {min.ClientHandle}; value: {min.Value}");
}
}
});
Console.WriteLine("Press any key to delete the subscription...");
while (!Console.KeyAvailable)
{
await Task.Delay(500);
}
Console.ReadKey(true);
Console.WriteLine("Step 8 - Delete the subscription.");
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await channel.DeleteSubscriptionsAsync(request);
token.Dispose();
Console.WriteLine("Press any key to close the session...");
Console.ReadKey(true);
Console.WriteLine("Step 9 - Close the session.");
await channel.CloseAsync();
}
catch (ServiceResultException ex)
{
if ((uint)ex.HResult == StatusCodes.BadSecurityChecksFailed)
{
Console.WriteLine("Error connecting to endpoint. Did the server reject our certificate?");
}
await channel.AbortAsync();
throw;
}
}
private static async Task TestAsync()
{
var discoveryUrl = "opc.tcp://*****:*****@"%LOCALAPPDATA%\Workstation.ConsoleApp\pki")),
userIdentity,
remoteEndpoint))
{
try
{
await session.OpenAsync();
}
catch (ServiceResultException ex)
{
if ((uint)ex.HResult == StatusCodes.BadSecurityChecksFailed)
{
Console.WriteLine("Error connecting to endpoint. Did the server reject our certificate?");
}
throw ex;
}
Console.WriteLine("Step 5 - Browse the server namespace.");
Console.WriteLine("+ Root");
BrowseRequest browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await session.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd1.DisplayName, rd1.BrowseName, rd1.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, session.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await session.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd2.DisplayName, rd2.BrowseName, rd2.NodeClass);
browseRequest = new BrowseRequest
{
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, session.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await session.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0])
{
Console.WriteLine(" + {0}: {1}, {2}", rd3.DisplayName, rd3.BrowseName, rd3.NodeClass);
}
}
}
Console.WriteLine("Press any key to continue...");
Console.ReadKey(true);
Console.WriteLine("Step 6 - Create a subscription.");
var subscriptionRequest = new CreateSubscriptionRequest
{
RequestedPublishingInterval = 1000,
RequestedMaxKeepAliveCount = 10,
RequestedLifetimeCount = 30,
PublishingEnabled = true
};
var subscriptionResponse = await session.CreateSubscriptionAsync(subscriptionRequest).ConfigureAwait(false);
var id = subscriptionResponse.SubscriptionId;
Console.WriteLine("Step 7 - Add items to the subscription.");
var itemsToCreate = new MonitoredItemCreateRequest[]
{
new MonitoredItemCreateRequest {
ItemToMonitor = new ReadValueId {
NodeId = NodeId.Parse("i=2258"), AttributeId = AttributeIds.Value
}, MonitoringMode = MonitoringMode.Reporting, RequestedParameters = new MonitoringParameters {
ClientHandle = 12345, SamplingInterval = -1, QueueSize = 0, DiscardOldest = true
}
}
};
var itemsRequest = new CreateMonitoredItemsRequest
{
SubscriptionId = id,
ItemsToCreate = itemsToCreate,
};
var itemsResponse = await session.CreateMonitoredItemsAsync(itemsRequest).ConfigureAwait(false);
Console.WriteLine("Step 8 - Publish the subscription.");
var publishRequest = new PublishRequest
{
SubscriptionAcknowledgements = new SubscriptionAcknowledgement[0]
};
Console.WriteLine("Press any key to delete the subscription...");
while (!Console.KeyAvailable)
{
var publishResponse = await session.PublishAsync(publishRequest).ConfigureAwait(false);
// loop thru all the data change notifications
var dcns = publishResponse.NotificationMessage.NotificationData.OfType <DataChangeNotification>();
foreach (var dcn in dcns)
{
foreach (var min in dcn.MonitoredItems)
{
Console.WriteLine($"clientHandle: {min.ClientHandle}; value: {min.Value}");
}
}
publishRequest = new PublishRequest
{
SubscriptionAcknowledgements = new[] { new SubscriptionAcknowledgement {
SequenceNumber = publishResponse.NotificationMessage.SequenceNumber, SubscriptionId = publishResponse.SubscriptionId
} }
};
}
Console.ReadKey(true);
Console.WriteLine("Step 9 - Delete the subscription.");
var request = new DeleteSubscriptionsRequest
{
SubscriptionIds = new uint[] { id }
};
await session.DeleteSubscriptionsAsync(request).ConfigureAwait(false);
Console.WriteLine("Press any key to close the session...");
Console.ReadKey(true);
Console.WriteLine("Step 10 - Close the session.");
await session.CloseAsync();
}
}
/// <summary>
/// Most important method - reading the tags.
/// </summary>
public async Task <List <Tag> > OPCReadAsync(string OPCAdress)
{
//Preparing data to connect to OPC server
Tags = new List <Tag>();
var loggerFactory = new LoggerFactory();
var appDescription = new ApplicationDescription()
{
ApplicationName = "OPC",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:OPC",
ApplicationType = ApplicationType.Client,
};
var certificateStore = new DirectoryStore(
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Workstation.ConsoleApp", "pki"));
var channel = new UaTcpSessionChannel(
appDescription,
certificateStore,
new AnonymousIdentity(), //by now doesn't support signing in
OPCAdress,
loggerFactory: loggerFactory);
try
{
Stopwatch stopwatch = new Stopwatch(); //measuring operations time
stopwatch.Start();
await channel.OpenAsync(); //opening channel
OnNewEvent(new LogEventArgs("Connected to OPC Server"));
//opening OPC tree branches to find actual tags - only proper for B&R X20 PLC
BrowseRequest browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = NodeId.Parse(ObjectIds.RootFolder), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[1].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[0].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[1].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(browseResponse.Results[0].References[10].NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
BrowseResponse browseResponse0 = await channel.BrowseAsync(browseRequest);
int nestingLevel = 0; //nesting level counter
Tag tag = new Tag(); //initializing first tag
int allTagsCount = browseResponse0.Results[0].References.Length - 1; //for counting progress percentage
for (int i = browseResponse0.Results[0].References.Length - 1; i >= 0; i--) //first level loop
{
var rd = browseResponse0.Results[0].References[i];
if (Tags.Count > 0 && rd.DisplayName.ToString() == Tags[0].Name)
{
break;
} //to avoid getting the same tags second time
nestingLevel = 0;
ReadValueId[] items = new ReadValueId[1];
items[0] = new ReadValueId {
NodeId = NodeId.Parse(rd.NodeId.ToString()), AttributeId = AttributeIds.DataType
};
ReadRequest readRequest = new ReadRequest {
NodesToRead = items
};
ReadResponse readResponse = await channel.ReadAsync(readRequest);
if (string.IsNullOrEmpty(tag.Name))
{
tag = new Tag(rd.DisplayName.ToString());
}
if (readResponse.Results[0].Value != null)
{
tag.ConversionFunction = Typ(readResponse.Results[0].Value.ToString());
}
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd1 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //second level loop (nesting=1)
{
if (!rd1.NodeId.ToString().Contains("#"))
{
nestingLevel = 1;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1 }, channel, tag);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd1.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd2 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //third level loop (nesting=2)
{
if (!rd2.NodeId.ToString().Contains("#"))
{
nestingLevel = 2;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1, rd2 }, channel, tag);
browseRequest = new BrowseRequest {
NodesToBrowse = new BrowseDescription[] { new BrowseDescription {
NodeId = ExpandedNodeId.ToNodeId(rd2.NodeId, channel.NamespaceUris), BrowseDirection = BrowseDirection.Forward, ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences), NodeClassMask = (uint)NodeClass.Variable | (uint)NodeClass.Object | (uint)NodeClass.Method, IncludeSubtypes = true, ResultMask = (uint)BrowseResultMask.All
} },
};
browseResponse = await channel.BrowseAsync(browseRequest);
foreach (var rd3 in browseResponse.Results[0].References ?? new ReferenceDescription[0]) //fourth level loop (nesting=3)
{
if (!rd3.NodeId.ToString().Contains("#"))
{
nestingLevel = 3;
tag = await ReadTag(new ReferenceDescription[] { rd, rd1, rd2, rd3 }, channel, tag);
}
else if (rd3.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1, rd2, rd3 }, channel, tag);
}
if (nestingLevel == 3 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
}
else if (rd2.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1, rd2 }, channel, tag);
}
if (nestingLevel == 2 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
}
else if (rd1.NodeId.ToString().Contains("#EngineeringUnits"))
{
await ReadUnit(new ReferenceDescription[] { rd, rd1 }, channel, tag);
}
if (nestingLevel == 1 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
}
if (nestingLevel == 0 && !string.IsNullOrEmpty(tag.Name))
{
tag = SaveTag(tag);
}
OnProgressChanged(new ProgressChangedArgs((allTagsCount - i) * 100 / allTagsCount)); //computing progress percentage
}
await channel.CloseAsync(); //closing the channel
stopwatch.Stop();
OnNewEvent(new LogEventArgs(Tags.Count + " tags read, time elapsed: " + stopwatch.Elapsed.TotalSeconds.ToString("F3") + " s"));
}
catch (Exception ex)
{
OnNewEvent(new LogEventArgs("Error connecting to OPC server."));
await channel.AbortAsync();
}
return(Tags);
}
public async Task BrowseObjectFolder()
{
// describe this client application.
var clientDescription = new ApplicationDescription
{
ApplicationName = "Workstation.UaClient.FeatureTests",
ApplicationUri = $"urn:{System.Net.Dns.GetHostName()}:Workstation.UaClient.FeatureTests",
ApplicationType = ApplicationType.Client
};
// place to store certificates
var certificateStore = new DirectoryStore("./pki");
// create a 'UaTcpSessionChannel', a client-side channel that opens a 'session' with the server.
var channel = new UaTcpSessionChannel(
clientDescription,
certificateStore,
new AnonymousIdentity(),
"opc.tcp://localhost:48010"); // the endpoint of Unified Automation's UaCPPServer.
try
{
// try opening a session and reading a few nodes.
await channel.OpenAsync();
Console.WriteLine($"Opened session with endpoint '{channel.RemoteEndpoint.EndpointUrl}'.");
Console.WriteLine($"SecurityPolicy: '{channel.RemoteEndpoint.SecurityPolicyUri}'.");
Console.WriteLine($"SecurityMode: '{channel.RemoteEndpoint.SecurityMode}'.");
Console.WriteLine($"UserIdentityToken: '{channel.UserIdentity}'.");
// build a BrowseRequest. See 'OPC UA Spec Part 4' section 5.8.2
var browseRequest = new BrowseRequest
{
NodesToBrowse = new[] {
new BrowseDescription {
// gather references of this nodeid.
NodeId = NodeId.Parse(ObjectIds.ObjectsFolder),
// include just 'Forward' references
BrowseDirection = BrowseDirection.Forward,
// include 'HierarchicalReferences'
ReferenceTypeId = NodeId.Parse(ReferenceTypeIds.HierarchicalReferences),
// include 'HierarchicalReferences' and all subtypes of 'HierarchicalReferences'
IncludeSubtypes = true,
// include all classes of node
NodeClassMask = (uint)NodeClass.Unspecified,
// return reference descriptions with all the fields filled out
ResultMask = (uint)BrowseResultMask.All,
}
},
RequestedMaxReferencesPerNode = 1000
};
// send the request to the server
var browseResponse = await channel.BrowseAsync(browseRequest).ConfigureAwait(false);
Console.WriteLine("\n+ Objects, 0:Objects, Object, i=85");
Assert.IsNotNull(browseResponse.Results[0].References);
foreach (var rd in browseResponse.Results[0].References)
{
Console.WriteLine(" + {0}, {1}, {2}, {3}", rd.DisplayName, rd.BrowseName, rd.NodeClass, rd.NodeId);
}
// it is good practice to be prepared to receive a continuationPoint.
// ContinuationPoints are returned when the server has more information
// than can be delivered in current response.
// To test this code, you can reduce the above RequestedMaxReferencesPerNode
// to 1.
var cp = browseResponse.Results[0].ContinuationPoint;
while (cp != null)
{
var browseNextRequest = new BrowseNextRequest {
ContinuationPoints = new[] { cp }, ReleaseContinuationPoints = false
};
var browseNextResponse = await channel.BrowseNextAsync(browseNextRequest);
Assert.IsNotNull(browseNextResponse.Results[0].References);
foreach (var rd in browseNextResponse.Results[0].References)
{
Console.WriteLine(" + {0}, {1}, {2}", rd.DisplayName, rd.BrowseName, rd.NodeClass);
}
cp = browseNextResponse.Results[0].ContinuationPoint;
}
Console.WriteLine($"\nClosing session '{channel.SessionId}'.");
await channel.CloseAsync();
}
catch (Exception ex)
{
await channel.AbortAsync();
Console.WriteLine(ex.Message);
}
}