awcullen
commented
7 years ago When using version 2.0.0-RC2, you can build a UaApplication in app.cs.
protected override void OnStart()
{
// Setup a logger.
this.loggerFactory = new LoggerFactory();
this.loggerFactory.AddDebug(LogLevel.Trace);
// 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)
.Build();
this.application.Run();
// Show the MainPage
this.MainPage = new NavigationPage(new MainPage());
}
Then you create 10 view-models, each with a specific name and Subscription attribute with the ipAddress of the server.
/// <summary>
/// A model for PLC1MainView.
/// </summary>
[Subscription(endpointUrl: "opc.tcp://plc1:26543", publishingInterval: 500, keepAliveCount: 20)]
public class PLC1MainViewModel : SubscriptionBase
{
/// <summary>
/// Gets or sets the value of Axis1.
/// </summary>
[MonitoredItem(nodeId: "ns=2;s=Axis1")]
public float Axis1
{
get { return this.axis1; }
set { this.SetProperty(ref this.axis1, value); }
}
private float axis1;
}The last thing is the MainView, which shows the 10 view-models
<ScrollView>
<StackLayout>
<StackLayout>
<StackLayout.BindingContext>
<local:PLC1MainViewModel />
</StackLayout.BindingContext>
<Label Text="PLC1Axis1" />
<Slider Minimum="-180"
Maximum="180"
Value="{Binding Axis1, Mode=TwoWay}"/>
</StackLayout>
<StackLayout>
<StackLayout.BindingContext>
<local:PLC2MainViewModel />
</StackLayout.BindingContext>
<Label Text="PLC2Axis1" />
<Slider Minimum="-180"
Maximum="180"
Value="{Binding Axis1, Mode=TwoWay}"/>
</StackLayout>
<!--repeat 8 more times-->
</StackLayout>
</ScrollView>
tejasklodha
Dear Sir,
I am looking for that multiple opc ua server fetch and display on same page of mobile application
Example: I have 10 OPC UA server and fetch some 5 variables from each server and display 5 variable of each opc ua server on same page of android application. can you demonstrate this in Workstation.MobileHmi ?
Thanks,