How to make these parameter can modify

[Savoyyang]

Dear sir, How to make these parameter can modify in View, seemingly cannot use class variables.

[Subscription(endpointUrl: "opc.tcp://192.168.11.18:4840", publishingInterval: 500, keepAliveCount: 20)]

[awcullen]

You can change the endpointUrl using the 'map' method of the UaApplicationBuilder. I'll give two examples. First, you can add a .Map(x, y) method to the builder that will replace all requests for endpoint 'x' with endpoint 'y' instead.

            // Build and run an OPC UA application instance.
            this.application = new UaApplicationBuilder()
                .UseApplicationUri($"urn:{Dns.GetHostName()}:Workstation.MobileHmi")
                .UseDirectoryStore(Path.Combine(
                    Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
                    "pki"))
                .UseIdentity(this.ShowSignInDialog)
                .UseLoggerFactory(this.loggerFactory)
                .Map("opc.tcp://localhost:26543", "opc.tcp://10.0.2.2:26543")
                .Build();

            this.application.Run();

Second, you can add a .Map(configuration) method to the builder that will read a text file for the mappings.

            // Read 'appSettings.json' for endpoint configuration
            var config = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appSettings.json", true)
                .Build();

            // Build and run an OPC UA application instance.
            this.application = new UaApplicationBuilder()
                .UseApplicationUri($"urn:{Dns.GetHostName()}:Workstation.RobotHmi")
                .UseDirectoryStore(Path.Combine(
                    Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
                    "Workstation.RobotHmi",
                    "pki"))
                .UseIdentity(this.ShowSignInDialog)
                .UseLoggerFactory(this.loggerFactory)
                .Map(config)
                .Build();

            this.application.Run();

Lastly, with either mapping can specify the SecurityPolicyUri, which will select an endpoint with matching policy.

[Savoyyang]

First, That appSettings.json can contain more than one endpointUrl ? and can contain publishingInterval keepAliveCount ? If can,you can give me a examples of appSetting.json.

Second, Would use the first .Map("opc.tcp://localhost:26543", "opc.tcp://10.0.2.2:26543") rather than [Subscription(endpointUrl: "opc.tcp://192.168.11.18:4840"]， Or What is the relationship between them?

[awcullen]

appSettings.json

{
  "maps": [
    {
      "requestedUrl": "opc.tcp://localhost:26543",
      "endpoint": {
        "endpointUrl": "opc.tcp://andrew-think:26543",
        "securityPolicyUri": "http://opcfoundation.org/UA/SecurityPolicy#None"
      }
    }
  ]
}

publishingInterval and keepAliveCount are not configurable.

[Savoyyang]

I know this code is in the inside of the RobotHmi ,I forgot I was going to use is on the android App, Don't know whether you have the plan add this in Android App(and the SignInDialog next week?). Thank you very much.