OPC UA .net标准重新连接

Question

I'm working on an opc client using the .net standard stack from the opc foundation. Everything seems to work as expected. I can establish a session, add subscriptions, items, get notifications when data changes...

The issue I'm having is I can't find an event in the Session that fires when the Session is closed from the server side.

I'm testing with Kepserver EX 6. When i reinitialize or turn off the runtime in the server, my SessionClosing event isn't firing, so i supposed the Server isnt notifying the client. I don't know if it would fire after a timeout or something?

After this, my Opc.Ua.Client.Session object in the client code still shows the Connected property as true. Only when when i try do do something like adding a new subscription do i get a Bad session exception .

I could catch the exception and reestablish a new Session or try to fix the current one, but i'd rather know that the Session has gone bad beforehand. I don't even know if this is possible.

Thanks.

wrapped.Create

Answer 1

This is the config. I guess i must've picked it from an example:

var config = new ApplicationConfiguration() { ApplicationName = AppName, ApplicationUri = Utils.Format($@"urn:{0}:{AppName}", System.Net.Dns.GetHostName()), ApplicationType = ApplicationType.Client, SecurityConfiguration = new SecurityConfiguration { ApplicationCertificate = new CertificateIdentifier { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\\OPC Foundation\\CertificateStores\\MachineDefault", SubjectName = Utils.Format(@"CN={0}, DC={1}", "MyHomework", System.Net.Dns.GetHostName()) }, TrustedIssuerCertificates = new CertificateTrustList { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\\OPC Foundation\\CertificateStores\\UA Certificate Authorities" }, TrustedPeerCertificates = new CertificateTrustList { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\\OPC Foundation\\CertificateStores\\UA Applications" }, RejectedCertificateStore = new CertificateTrustList { StoreType = @"Directory", StorePath = @"%CommonApplicationData%\\OPC Foundation\\CertificateStores\\RejectedCertificates" }, AutoAcceptUntrustedCertificates = true, AddAppCertToTrustedStore = true, RejectSHA1SignedCertificates = false, MinimumCertificateKeySize = 1024 }, TransportConfigurations = new TransportConfigurationCollection(), TransportQuotas = new TransportQuotas { OperationTimeout = 15000 }, ClientConfiguration = new ClientConfiguration { DefaultSessionTimeout = 60000 }, TraceConfiguration = new TraceConfiguration() }

Then i use the config object in the Session constructor:

Session.Create(config, new ConfiguredEndpoint(null, selectedEndpoint, EndpointConfiguration.Create(config)), false, "", 60000, credentials, null) It seems that 60000 is specified twice.