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);
}
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);
}
}
